Pub Date : 2022-08-01DOI: 10.22201/ia.14052059p.2022.54.15
T. Madura, C. Christian, T. Wild, D. Hurd, J. Harris, L. Bartolone, K. Silberman, S. McVoy, K. Walker
For students with visual impairments (VI), the possibility of a future in astronomy, or any science, technology, engineering, and mathematics (STEM) field, seems daunting. In order to bolster astronomy and STEM opportunities for high school students with VI in the United States, we developed the STEM Career Exploration Lab (CEL). Our STEM CEL methodology employs tactile astronomy instruction via 3D printing technologies and unique 3D-printed models, professionals with VI acting as role models, and partnerships with local STEM industries that provide insights into possible career paths. In partnership with the South Carolina Commission for the Blind (SCCB) and the Michigan Bureau of Services for Blind Persons (MBSBP), to date we have held four weeklong CELs (June 2017, June & July 2018, August 2019) and a 3D printer build workshop (September 2018), thus far serving about fifty students with VI. We have also held one professional development workshop for teachers of the visually impaired at the Maryland School for the Blind in October 2021. We gathered pre- and post-intervention data via student surveys, assessments of students' astronomy knowledge, and video recordings of the CEL activities in order to study to what extent the CEL model can enhance the students' attitudes towards, interests in, and capacities to participate in astronomy and STEM careers. Once fully tested and refined, we will make our 3D model files and activities freely available for further use and study. This work serves as a testbed for an expanded CEL program aimed at helping increase the representation of persons with VI in astronomy and STEM fields. This work is supported by a generous Innovative Technology Experiences for Students and Teachers (ITEST) grant from the National Science Foundation.
{"title":"ASTRONOMY FOR STUDENTS WITH VISUAL IMPAIRMENTS: DEVELOPMENT OF THE CAREER EXPLORATION LAB","authors":"T. Madura, C. Christian, T. Wild, D. Hurd, J. Harris, L. Bartolone, K. Silberman, S. McVoy, K. Walker","doi":"10.22201/ia.14052059p.2022.54.15","DOIUrl":"https://doi.org/10.22201/ia.14052059p.2022.54.15","url":null,"abstract":"For students with visual impairments (VI), the possibility of a future in astronomy, or any science, technology, engineering, and mathematics (STEM) field, seems daunting. In order to bolster astronomy and STEM opportunities for high school students with VI in the United States, we developed the STEM Career Exploration Lab (CEL). Our STEM CEL methodology employs tactile astronomy instruction via 3D printing technologies and unique 3D-printed models, professionals with VI acting as role models, and partnerships with local STEM industries that provide insights into possible career paths. In partnership with the South Carolina Commission for the Blind (SCCB) and the Michigan Bureau of Services for Blind Persons (MBSBP), to date we have held four weeklong CELs (June 2017, June & July 2018, August 2019) and a 3D printer build workshop (September 2018), thus far serving about fifty students with VI. We have also held one professional development workshop for teachers of the visually impaired at the Maryland School for the Blind in October 2021. We gathered pre- and post-intervention data via student surveys, assessments of students' astronomy knowledge, and video recordings of the CEL activities in order to study to what extent the CEL model can enhance the students' attitudes towards, interests in, and capacities to participate in astronomy and STEM careers. Once fully tested and refined, we will make our 3D model files and activities freely available for further use and study. This work serves as a testbed for an expanded CEL program aimed at helping increase the representation of persons with VI in astronomy and STEM fields. This work is supported by a generous Innovative Technology Experiences for Students and Teachers (ITEST) grant from the National Science Foundation.","PeriodicalId":49602,"journal":{"name":"Revista Mexicana de Astronomia y Astrofisica","volume":"141 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86596174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-01DOI: 10.22201/ia.14052059p.2022.54.20
C. Fuentes-Muñoz, P. Paredes-Sabando
Dedoscopio have developed outreach activities focused on people with visual disabilities since 2018 in Chile. The initiative uses homemade low-cost tactile materials as a medium to represent astronomical concepts and physical phenomena. During the quarantine time, we started a Audio-Reading Club with blind and visually impaired children from two parts of Chile. It was such a success that it crossed the borders and we were able to reach Bolivian children.
{"title":"DEDOSCOPIO: AN INCLUSIVE PROJECT DEDICATED TO BRING TACTILE ASTRONOMY TALKS","authors":"C. Fuentes-Muñoz, P. Paredes-Sabando","doi":"10.22201/ia.14052059p.2022.54.20","DOIUrl":"https://doi.org/10.22201/ia.14052059p.2022.54.20","url":null,"abstract":"Dedoscopio have developed outreach activities focused on people with visual disabilities since 2018 in Chile. The initiative uses homemade low-cost tactile materials as a medium to represent astronomical concepts and physical phenomena. During the quarantine time, we started a Audio-Reading Club with blind and visually impaired children from two parts of Chile. It was such a success that it crossed the borders and we were able to reach Bolivian children.","PeriodicalId":49602,"journal":{"name":"Revista Mexicana de Astronomia y Astrofisica","volume":"295 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76315582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-01DOI: 10.22201/ia.14052059p.2022.54.16
M. Villarreal-Gomez, J. Grisales-Casadiegos, J. Pisco-Guavabe, V. González-Matoma, L. Núñez, C. Scorza
We introduce Astropáramo: an initiative of science clubs in rural educational institutions in very remote regions of the Santurbán páramo. This initiative uses a mobile laboratory of didactic experiments initially developed by the University of Munich within the project "Climate change: understanding and acting". Taking advantage of the innate charisma for stars in the inhabitants of the mountainous areas of Colombia, we use the teaching of astronomy as a bridge to recognize our planet as the only home and understand the science and importance of climate change. The first version was developed with three educational institutions in the paramo area. The students had synchronous encounters with an instructor via WhatsApp: the only means that the pandemic allowed the connection of students in remote areas of the country. Thanks to this medium, the young people could share their experiences and doubts they encountered in the development of the experiments. Thus, despite the adverse conditions of the pandemic, favorable spaces were generated for debate and the construction of knowledge, demonstrating that science is inclusive, fun, and can be available to everyone.
{"title":"ASTROPARAMO. SCIENCE CLUB OF PLANETARY HABITABILITY AND CLIMATE CHANGE","authors":"M. Villarreal-Gomez, J. Grisales-Casadiegos, J. Pisco-Guavabe, V. González-Matoma, L. Núñez, C. Scorza","doi":"10.22201/ia.14052059p.2022.54.16","DOIUrl":"https://doi.org/10.22201/ia.14052059p.2022.54.16","url":null,"abstract":"We introduce Astropáramo: an initiative of science clubs in rural educational institutions in very remote regions of the Santurbán páramo. This initiative uses a mobile laboratory of didactic experiments initially developed by the University of Munich within the project \"Climate change: understanding and acting\". Taking advantage of the innate charisma for stars in the inhabitants of the mountainous areas of Colombia, we use the teaching of astronomy as a bridge to recognize our planet as the only home and understand the science and importance of climate change. The first version was developed with three educational institutions in the paramo area. The students had synchronous encounters with an instructor via WhatsApp: the only means that the pandemic allowed the connection of students in remote areas of the country. Thanks to this medium, the young people could share their experiences and doubts they encountered in the development of the experiments. Thus, despite the adverse conditions of the pandemic, favorable spaces were generated for debate and the construction of knowledge, demonstrating that science is inclusive, fun, and can be available to everyone.","PeriodicalId":49602,"journal":{"name":"Revista Mexicana de Astronomia y Astrofisica","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87492854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-26DOI: 10.22201/ia.01851101p.2022.58.02.12
V. Makarov
The mean parallax of the Pleiades open cluster from the Hipparcos catalog is larger than the true value by approximately 1 mas. The origin of this error, as well as a possible algorithm of correcting it, was proposed by Makarov (2002). The problem is reassessed using the more accurate Gaia data with a focus on the predicted correction to the Pleiades proper motions. The accurately determined differences Gaia − Hipparcos for 52 common stars are close to these estimates within the formal uncertainties for all three parameters, which strongly suggests that the proposed interpretation was correct. With adjustments for the systematic vector field fitted with 126 vector spherical harmonics to degree 7, these differences amount to (+0.39, −0.74) mas yr−1 . The implications of small-scale proper motion and position errors in Hipparcos for present day astrometry are briefly discussed.
依巴谷星表中昴宿星团疏散星团的平均视差比真实值大了大约1 mas。Makarov(2002)提出了这种误差的起源，以及一种可能的修正算法。使用更精确的盖亚数据重新评估了这个问题，重点是对昴宿星团固有运动的预测修正。在所有三个参数的形式不确定性范围内，精确确定的52颗普通恒星的Gaia - Hipparcos差异接近这些估计，这强烈表明所提出的解释是正确的。对系统矢量场进行调整，拟合126次矢量球谐波至7度，这些差异为(+0.39，- 0.74)mas yr - 1。简要讨论了依巴谷望远镜的小尺度固有运动和位置误差对当今天体测量的意义。
{"title":"THE HIPPARCOS PLEIADES PARALLAX ERROR IS ALSO A PROPER MOTION ERROR","authors":"V. Makarov","doi":"10.22201/ia.01851101p.2022.58.02.12","DOIUrl":"https://doi.org/10.22201/ia.01851101p.2022.58.02.12","url":null,"abstract":"The mean parallax of the Pleiades open cluster from the Hipparcos catalog is larger than the true value by approximately 1 mas. The origin of this error, as well as a possible algorithm of correcting it, was proposed by Makarov (2002). The problem is reassessed using the more accurate Gaia data with a focus on the predicted correction to the Pleiades proper motions. The accurately determined differences Gaia − Hipparcos for 52 common stars are close to these estimates within the formal uncertainties for all three parameters, which strongly suggests that the proposed interpretation was correct. With adjustments for the systematic vector field fitted with 126 vector spherical harmonics to degree 7, these differences amount to (+0.39, −0.74) mas yr−1 . The implications of small-scale proper motion and position errors in Hipparcos for present day astrometry are briefly discussed.","PeriodicalId":49602,"journal":{"name":"Revista Mexicana de Astronomia y Astrofisica","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43408382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-23DOI: 10.22201/ia.01851101p.2022.58.02.15
'A. Torregrosa, J. J. Rodes-Roca, J. M. Torrej'on, G. Sanjurjo-Ferr'in, G. Bernabeu
The aim of this work is to study both light curve and orbital phase spectroscopy of Cen X-3 taking advantage of the MAXI/GSC observation strategy. These studies allow delimiting the stellar wind properties and its interactions with the compact object. From the analysis of the light curve, we have estimated the orbital period of the binary system and also found possible QPOs around a superorbital period of Psuperorb = 220 ± 5 days. Both orbital phase-averaged and phaseresolved spectra were extracted and analysed in the 2.0–20.0 keV energy range. Two models have described spectra satisfactorily, a partial absorbed Comptonization of cool photons on hot electrons plus a power law, and a partial absorbed blackbody plus a power law, both modified by adding Gaussian lines. The high value of the X-ray luminosity in the averaged spectrum indicates that the accretion mode is not only due to the stellar wind.
{"title":"CEN X–3 AS SEEN BY MAXI DURING SIX YEARS","authors":"'A. Torregrosa, J. J. Rodes-Roca, J. M. Torrej'on, G. Sanjurjo-Ferr'in, G. Bernabeu","doi":"10.22201/ia.01851101p.2022.58.02.15","DOIUrl":"https://doi.org/10.22201/ia.01851101p.2022.58.02.15","url":null,"abstract":"The aim of this work is to study both light curve and orbital phase spectroscopy of Cen X-3 taking advantage of the MAXI/GSC observation strategy. These studies allow delimiting the stellar wind properties and its interactions with the compact object. From the analysis of the light curve, we have estimated the orbital period of the binary system and also found possible QPOs around a superorbital period of Psuperorb = 220 ± 5 days. Both orbital phase-averaged and phaseresolved spectra were extracted and analysed in the 2.0–20.0 keV energy range. Two models have described spectra satisfactorily, a partial absorbed Comptonization of cool photons on hot electrons plus a power law, and a partial absorbed blackbody plus a power law, both modified by adding Gaussian lines. The high value of the X-ray luminosity in the averaged spectrum indicates that the accretion mode is not only due to the stellar wind.","PeriodicalId":49602,"journal":{"name":"Revista Mexicana de Astronomia y Astrofisica","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42217817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-13DOI: 10.22201/ia.01851101p.2022.58.02.14
T. Yontan, Hikmet C¸akmak, S. Bilir, T. Banks, Michel Ra´ul, R. Canbay, Seliz Ko¸c, Seval Ta¸sdemir, H¨ulya Er¸cay, Bur¸cin Tanık ¨Ozt¨urk, Deniz Cennet Dursun
We present photometric, astrometric, and kinematic studies of the old open star clusters NGC 1193 and NGC 1798. Both of the clusters are investigated by combining data sets from Gaia Early Data Release 3 (EDR3) and CCD UBV observational data. E(B − V ) color excesses are derived for NGC 1193 as 0.150 ± 0.037 and for NGC 1798 as 0.505 ± 0.100 mag through the use of two-color diagrams. Photometric metallicities are also determined from two-color diagrams with the results of [Fe/H]=−0.30 ± 0.06 dex for NGC 1193 and [Fe/H]=−0.20 ± 0.07 dex for NGC 1798. The isochrone fitting distance and age of NGC 1193 are 5562 ± 381 pc and 4.6±1 Gyr, respectively. For NGC 1798, these parameters are 4451±728 pc and 1.3±0.2 Gyr. Kinematic and dynamic orbital calculations indicate that NGC 1193 and NGC 1798 belong to the thick-disk and thin-disk populations, respectively.
{"title":"A STUDY OF THE NGC 1193 AND NGC 1798 OPEN CLUSTERS USING CCD UBV PHOTOMETRIC AND GAIA EDR3 DATA","authors":"T. Yontan, Hikmet C¸akmak, S. Bilir, T. Banks, Michel Ra´ul, R. Canbay, Seliz Ko¸c, Seval Ta¸sdemir, H¨ulya Er¸cay, Bur¸cin Tanık ¨Ozt¨urk, Deniz Cennet Dursun","doi":"10.22201/ia.01851101p.2022.58.02.14","DOIUrl":"https://doi.org/10.22201/ia.01851101p.2022.58.02.14","url":null,"abstract":"We present photometric, astrometric, and kinematic studies of the old open star clusters NGC 1193 and NGC 1798. Both of the clusters are investigated by combining data sets from Gaia Early Data Release 3 (EDR3) and CCD UBV observational data. E(B − V ) color excesses are derived for NGC 1193 as 0.150 ± 0.037 and for NGC 1798 as 0.505 ± 0.100 mag through the use of two-color diagrams. Photometric metallicities are also determined from two-color diagrams with the results of [Fe/H]=−0.30 ± 0.06 dex for NGC 1193 and [Fe/H]=−0.20 ± 0.07 dex for NGC 1798. The isochrone fitting distance and age of NGC 1193 are 5562 ± 381 pc and 4.6±1 Gyr, respectively. For NGC 1798, these parameters are 4451±728 pc and 1.3±0.2 Gyr. Kinematic and dynamic orbital calculations indicate that NGC 1193 and NGC 1798 belong to the thick-disk and thin-disk populations, respectively.","PeriodicalId":49602,"journal":{"name":"Revista Mexicana de Astronomia y Astrofisica","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43995425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-20DOI: 10.22201/ia.14052059p.2022.54.25
E. Pérez-Montero, C. Barnés-Castaño, E. J. G. Gómez-Caro
ASTROACCESIBLE is an outreach project hosted by the Instituto de Astrofísica de Andalucía (CSIC) and leaded by a blind astronomer. It is aimed at the teaching and popularisation of astronomy and astrophysics among all people regardless of their abilities using a wide range of inclusive resources. Audio description is one of the most extended inclusive resources for making films and artworks accessible for blind and partially sighted people. However, its potential for the description of astronomical images has not been widely exploited. In this contribution, we introduce The Universe in words, a series of videos describing images of some of the most popular objects in the Messier catalogue. These audio descriptions do not only have a prominent inclusive aspect, but also imply a better and deeper understanding of the represented objects for everybody. The resulting videos can also be used as a complement to other resources for in-person activities, such as sonifications or tactile models of the same or similar astronomical objects.
astroaccessible是由Astrofísica de Andalucía研究所(CSIC)主办的一个外展项目，由一位盲人天文学家领导。它的目的是利用广泛的包容性资源，在所有人中间教授和普及天文学和天体物理学，无论其能力如何。音频描述是为盲人和弱视人士制作电影和艺术品的最广泛的包容性资源之一。然而，它在描述天文图像方面的潜力还没有得到广泛的开发。在这篇文章中，我们用语言介绍了宇宙，这是一系列视频，描述了梅西耶星表中一些最受欢迎的天体的图像。这些音频描述不仅具有突出的包容性，而且还意味着每个人对所代表的对象有更好更深入的理解。由此产生的视频也可以作为其他面对面活动资源的补充，例如相同或类似天文物体的声音或触觉模型。
{"title":"THE UNIVERSE IN WORDS: ASTRONOMY FOR ALL THROUGH AUDIO DESCRIPTION WITHIN THE OUTREACH PROJECT ASTROACCESIBLE","authors":"E. Pérez-Montero, C. Barnés-Castaño, E. J. G. Gómez-Caro","doi":"10.22201/ia.14052059p.2022.54.25","DOIUrl":"https://doi.org/10.22201/ia.14052059p.2022.54.25","url":null,"abstract":"ASTROACCESIBLE is an outreach project hosted by the Instituto de Astrofísica de Andalucía (CSIC) and leaded by a blind astronomer. It is aimed at the teaching and popularisation of astronomy and astrophysics among all people regardless of their abilities using a wide range of inclusive resources. Audio description is one of the most extended inclusive resources for making films and artworks accessible for blind and partially sighted people. However, its potential for the description of astronomical images has not been widely exploited. In this contribution, we introduce The Universe in words, a series of videos describing images of some of the most popular objects in the Messier catalogue. These audio descriptions do not only have a prominent inclusive aspect, but also imply a better and deeper understanding of the represented objects for everybody. The resulting videos can also be used as a complement to other resources for in-person activities, such as sonifications or tactile models of the same or similar astronomical objects.","PeriodicalId":49602,"journal":{"name":"Revista Mexicana de Astronomia y Astrofisica","volume":"117 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74516166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-25DOI: 10.22201/ia.14052059p.2022.54.06
R. Garc'ia-Benito, E. P'erez-Montero
CosMonic (COSmos harMONIC) is a sonification project with a triple purpose: analysis (by means of sounds) of any type of data, source of inspiration for artistic creations, and pedagogical and dissemination purposes. In this contribution we present the work recently produced by CosMonic in the latter field, creating specific cases for the inclusive astronomy dissemination project Astroaccesible for blind and partially sighted people, but also aimed at a general public that wants to understand astrophysics in an alternative format. For this project, CosMonic seeks to create simple astronomical cases in their acoustic dimension in order to be easily understood. CosMonic's philosophy for these sonifications can be summarized in a simple metaphor: painting graphs with sounds. Sonification is a powerful tool that helps to enhance visual information. Therefore, CosMonic accompanies its audios with animations, using complementary methods to reach a general public. In addition to providing some cases created by CosMonic for inclusive astronomy, we also share our experience with different audiences, as well as suggest some ideas for a better use of sonification in (global) inclusive outreach.
{"title":"PAINTING GRAPHS WITH SOUNDS: COSMONIC SONIFICATION PROJECT","authors":"R. Garc'ia-Benito, E. P'erez-Montero","doi":"10.22201/ia.14052059p.2022.54.06","DOIUrl":"https://doi.org/10.22201/ia.14052059p.2022.54.06","url":null,"abstract":"CosMonic (COSmos harMONIC) is a sonification project with a triple purpose: analysis (by means of sounds) of any type of data, source of inspiration for artistic creations, and pedagogical and dissemination purposes. In this contribution we present the work recently produced by CosMonic in the latter field, creating specific cases for the inclusive astronomy dissemination project Astroaccesible for blind and partially sighted people, but also aimed at a general public that wants to understand astrophysics in an alternative format. For this project, CosMonic seeks to create simple astronomical cases in their acoustic dimension in order to be easily understood. CosMonic's philosophy for these sonifications can be summarized in a simple metaphor: painting graphs with sounds. Sonification is a powerful tool that helps to enhance visual information. Therefore, CosMonic accompanies its audios with animations, using complementary methods to reach a general public. In addition to providing some cases created by CosMonic for inclusive astronomy, we also share our experience with different audiences, as well as suggest some ideas for a better use of sonification in (global) inclusive outreach.","PeriodicalId":49602,"journal":{"name":"Revista Mexicana de Astronomia y Astrofisica","volume":"5 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82327782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-25DOI: 10.22201/ia.01851101p.2022.58.02.07
N. Ahmed, T. M. Kamel, M. Nouh
A matter bouncing entropy-corrected cosmological model has been suggested. The model allows only positive curvature with negative pressure and no violation of the null energy condition. The result obtained in this paper is supported by some recent theoretical works where the combination of positive spatial curvature and vacuum energy leads to non-singular bounces with no violation of the null energy condition. An important feature of the current model is that evolutions of the cosmic pressure, energy density and equation of state parameter are independent of the values of the prefactors α and β in the corrected entropy-area relation. The validity of the classical and the new nonlinear energy conditions has been discussed. The cosmographic parameters have been analyzed.
{"title":"A NON-SINGULAR CLOSED BOUNCING UNIVERSE WITHOUT VIOLATION OF NULL ENERGY CONDITION","authors":"N. Ahmed, T. M. Kamel, M. Nouh","doi":"10.22201/ia.01851101p.2022.58.02.07","DOIUrl":"https://doi.org/10.22201/ia.01851101p.2022.58.02.07","url":null,"abstract":"A matter bouncing entropy-corrected cosmological model has been suggested. The model allows only positive curvature with negative pressure and no violation of the null energy condition. The result obtained in this paper is supported by some recent theoretical works where the combination of positive spatial curvature and vacuum energy leads to non-singular bounces with no violation of the null energy condition. An important feature of the current model is that evolutions of the cosmic pressure, energy density and equation of state parameter are independent of the values of the prefactors α and β in the corrected entropy-area relation. The validity of the classical and the new nonlinear energy conditions has been discussed. The cosmographic parameters have been analyzed.","PeriodicalId":49602,"journal":{"name":"Revista Mexicana de Astronomia y Astrofisica","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46285823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-06DOI: 10.22201/ia.01851101p.2022.58.02.09
G. Arreaga-García
We simulate the collapse of a turbulent gas cloud, in which we choose two sub-clouds. A translational velocity $vec{r}_L$ or $vec{r}_R$ is added, so that the sub-clouds move towards each other to collide. The radius and pre-collision velocity of the sub-clouds are chosen to be unequal, and both head-on and oblique collisions are considered. The simulations are all calibrated to have the same total mass and initial energy ratio α = 0.16, which is defined as the ratio of thermal energy to gravitational energy. We compare low-β models to a high-β models, where β is defined as the ratio of kinetic energy to gravitational energy. Finally, we consider the turbulent cloud to be under the gravitational influence of an object located far enough, in order to approximate the tidal effects by means of an azimuthal velocity Vcir added to the cloud particles apart from the translational and turbulent velocities mentioned above. We compare a low-Vcir model with a high-Vcir one.
{"title":"SIMULATIONS OF UNEQUAL BINARY COLLISIONS EMBEDDED IN A TURBULENT GAS CLOUD FAR FROM A MASSIVE GRAVITATIONAL CENTER","authors":"G. Arreaga-García","doi":"10.22201/ia.01851101p.2022.58.02.09","DOIUrl":"https://doi.org/10.22201/ia.01851101p.2022.58.02.09","url":null,"abstract":"We simulate the collapse of a turbulent gas cloud, in which we choose two sub-clouds. A translational velocity $vec{r}_L$ or $vec{r}_R$ is added, so that the sub-clouds move towards each other to collide. The radius and pre-collision velocity of the sub-clouds are chosen to be unequal, and both head-on and oblique collisions are considered. The simulations are all calibrated to have the same total mass and initial energy ratio α = 0.16, which is defined as the ratio of thermal energy to gravitational energy. We compare low-β models to a high-β models, where β is defined as the ratio of kinetic energy to gravitational energy. Finally, we consider the turbulent cloud to be under the gravitational influence of an object located far enough, in order to approximate the tidal effects by means of an azimuthal velocity Vcir added to the cloud particles apart from the translational and turbulent velocities mentioned above. We compare a low-Vcir model with a high-Vcir one.","PeriodicalId":49602,"journal":{"name":"Revista Mexicana de Astronomia y Astrofisica","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68129220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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