Pub Date : 2023-08-29DOI: 10.1103/PhysRevD.108.044074
I. de Martino
We have investigated whether the Scalar-Tensor-Vector Gravity theory (STVG) may explain the kinematic of stars in dwarf spheroidal galaxies. STVG modifies General Relativity by adding extra scalar and vector fields with the main aim of replacing dark matter in astrophysical self-gravitating systems. The weak-field limit of STVG brings a Yukawa-like modification to the Newtonian gravitational potential. The modification is modulated by two parameters, $alpha$ and $mu$, that represent a redefinition of the gravitational coupling constant and the mass of the additional vector fields, respectively. Thus, adopting the modified gravitational potential arising in the weak-field limit of STVG, we have solved the spherical Jeans equation to predict the line-of-sight velocity dispersion profiles of eight dwarf spheroidal galaxies orbiting around the Milky Way. The predicted profiles are then compared to the data using a Monte Carlo Markov Chain algorithm. Our results pointed out some tensions on the $alpha$ parameter within the data set, while comparison with previous analysis shows the effectiveness of STVG in replacing dark matter with extra massive fields. Further improvements will require more sophisticated modelling of the line-of-sight velocity dispersion which will be possible as soon as high-precision astrometric data in dwarf spheroidals will become available.
{"title":"Dynamics of dwarf galaxies in scalar-tensor-vector gravity","authors":"I. de Martino","doi":"10.1103/PhysRevD.108.044074","DOIUrl":"https://doi.org/10.1103/PhysRevD.108.044074","url":null,"abstract":"We have investigated whether the Scalar-Tensor-Vector Gravity theory (STVG) may explain the kinematic of stars in dwarf spheroidal galaxies. STVG modifies General Relativity by adding extra scalar and vector fields with the main aim of replacing dark matter in astrophysical self-gravitating systems. The weak-field limit of STVG brings a Yukawa-like modification to the Newtonian gravitational potential. The modification is modulated by two parameters, $alpha$ and $mu$, that represent a redefinition of the gravitational coupling constant and the mass of the additional vector fields, respectively. Thus, adopting the modified gravitational potential arising in the weak-field limit of STVG, we have solved the spherical Jeans equation to predict the line-of-sight velocity dispersion profiles of eight dwarf spheroidal galaxies orbiting around the Milky Way. The predicted profiles are then compared to the data using a Monte Carlo Markov Chain algorithm. Our results pointed out some tensions on the $alpha$ parameter within the data set, while comparison with previous analysis shows the effectiveness of STVG in replacing dark matter with extra massive fields. Further improvements will require more sophisticated modelling of the line-of-sight velocity dispersion which will be possible as soon as high-precision astrometric data in dwarf spheroidals will become available.","PeriodicalId":48711,"journal":{"name":"Physical Review D","volume":" ","pages":""},"PeriodicalIF":5.0,"publicationDate":"2023-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42917803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2023-08-29DOI: 10.1103/physrevd.108.035050
H. Baer, V. Barger, Dakotah Martinez, Shadman Salam
{"title":"Practical naturalness and its implications for weak scale supersymmetry","authors":"H. Baer, V. Barger, Dakotah Martinez, Shadman Salam","doi":"10.1103/physrevd.108.035050","DOIUrl":"https://doi.org/10.1103/physrevd.108.035050","url":null,"abstract":"","PeriodicalId":48711,"journal":{"name":"Physical Review D","volume":" ","pages":""},"PeriodicalIF":5.0,"publicationDate":"2023-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45350032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2023-08-28DOI: 10.1103/physrevd.108.043537
A. Raccanelli, Z. Vlah
{"title":"Observed power spectrum and frequency-angular power spectrum","authors":"A. Raccanelli, Z. Vlah","doi":"10.1103/physrevd.108.043537","DOIUrl":"https://doi.org/10.1103/physrevd.108.043537","url":null,"abstract":"","PeriodicalId":48711,"journal":{"name":"Physical Review D","volume":" ","pages":""},"PeriodicalIF":5.0,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44199124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2023-08-28DOI: 10.1103/physrevd.108.035029
A. Datta, R. Roshan, A. Sil
{"title":"Flavor leptogenesis during the reheating era","authors":"A. Datta, R. Roshan, A. Sil","doi":"10.1103/physrevd.108.035029","DOIUrl":"https://doi.org/10.1103/physrevd.108.035029","url":null,"abstract":"","PeriodicalId":48711,"journal":{"name":"Physical Review D","volume":" ","pages":""},"PeriodicalIF":5.0,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49306666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2023-08-28DOI: 10.1103/physrevd.108.039905
L. Hu, Orkash Amat, Li Wang, Adiljan Sawut, Hong Fan, B. Xie
{"title":"Erratum: Momentum spirals in multiphoton pair production revisited [Phys. Rev. D \u0000107\u0000, 116010 (2023)]","authors":"L. Hu, Orkash Amat, Li Wang, Adiljan Sawut, Hong Fan, B. Xie","doi":"10.1103/physrevd.108.039905","DOIUrl":"https://doi.org/10.1103/physrevd.108.039905","url":null,"abstract":"","PeriodicalId":48711,"journal":{"name":"Physical Review D","volume":" ","pages":""},"PeriodicalIF":5.0,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45848214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2023-08-28DOI: 10.1103/physrevd.108.035048
Jaydeb Das, N. Kumar
{"title":"Veltman criteria in the beyond standard model effective field theory of a complex scalar triplet","authors":"Jaydeb Das, N. Kumar","doi":"10.1103/physrevd.108.035048","DOIUrl":"https://doi.org/10.1103/physrevd.108.035048","url":null,"abstract":"","PeriodicalId":48711,"journal":{"name":"Physical Review D","volume":" ","pages":""},"PeriodicalIF":5.0,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49387203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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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