恒星风与系外行星等离子体射电发射效率

IF 1.1 4区 物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS Astronomy Letters-A Journal of Astronomy and Space Astrophysics Pub Date : 2024-05-13 DOI:10.1134/S1063773724600188
V. V. Zaitsev, V. E. Shaposhnikov, M. L. Khodachenko, M. S. Rumenskikh
{"title":"恒星风与系外行星等离子体射电发射效率","authors":"V. V. Zaitsev,&nbsp;V. E. Shaposhnikov,&nbsp;M. L. Khodachenko,&nbsp;M. S. Rumenskikh","doi":"10.1134/S1063773724600188","DOIUrl":null,"url":null,"abstract":"<p>We present the results of our study of the influence of stellar activity on the efficiency of the plasma radio emission generation mechanism and the properties of this emission in the atmospheres of exoplanets with a weak magnetic field. The plasma generation mechanism can be efficiently realized in the case where the Langmuir frequency exceeds the electron gyrofrequency, and the electron cyclotron maser is inefficient. This mechanism, which depends significantly on plasma parameters, suggests the generation of plasma (quasi-static) waves by energetic electrons followed by their conversion into electromagnetic radiation. The stellar wind, depending on its intensity, can modify significantly the plasmasphere of an exoplanet and change its parameters. Using the interaction of the exoplanet HD 189733b with a stellar wind of various intensities from the central star as an example, we show that the plasma mechanism can be realized at any stellar wind intensity, only the requirements for the parameters of the plasma mechanism change. In particular, the plasma wave energy density needed to generate a radio flux accessible to detection by modern radio-astronomical means changes, and its frequency range changes. The latter will allow the detected radio emission to be used as an indicator of the activity of the parent star.</p>","PeriodicalId":55443,"journal":{"name":"Astronomy Letters-A Journal of Astronomy and Space Astrophysics","volume":"50 1","pages":"81 - 91"},"PeriodicalIF":1.1000,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Stellar Wind and the Efficiency of Plasma Radio Emission from Exoplanets\",\"authors\":\"V. V. Zaitsev,&nbsp;V. E. Shaposhnikov,&nbsp;M. L. Khodachenko,&nbsp;M. S. Rumenskikh\",\"doi\":\"10.1134/S1063773724600188\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>We present the results of our study of the influence of stellar activity on the efficiency of the plasma radio emission generation mechanism and the properties of this emission in the atmospheres of exoplanets with a weak magnetic field. The plasma generation mechanism can be efficiently realized in the case where the Langmuir frequency exceeds the electron gyrofrequency, and the electron cyclotron maser is inefficient. This mechanism, which depends significantly on plasma parameters, suggests the generation of plasma (quasi-static) waves by energetic electrons followed by their conversion into electromagnetic radiation. The stellar wind, depending on its intensity, can modify significantly the plasmasphere of an exoplanet and change its parameters. Using the interaction of the exoplanet HD 189733b with a stellar wind of various intensities from the central star as an example, we show that the plasma mechanism can be realized at any stellar wind intensity, only the requirements for the parameters of the plasma mechanism change. In particular, the plasma wave energy density needed to generate a radio flux accessible to detection by modern radio-astronomical means changes, and its frequency range changes. The latter will allow the detected radio emission to be used as an indicator of the activity of the parent star.</p>\",\"PeriodicalId\":55443,\"journal\":{\"name\":\"Astronomy Letters-A Journal of Astronomy and Space Astrophysics\",\"volume\":\"50 1\",\"pages\":\"81 - 91\"},\"PeriodicalIF\":1.1000,\"publicationDate\":\"2024-05-13\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Astronomy Letters-A Journal of Astronomy and Space Astrophysics\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://link.springer.com/article/10.1134/S1063773724600188\",\"RegionNum\":4,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ASTRONOMY & ASTROPHYSICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Astronomy Letters-A Journal of Astronomy and Space Astrophysics","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1134/S1063773724600188","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ASTRONOMY & ASTROPHYSICS","Score":null,"Total":0}
引用次数: 0

摘要

摘要 我们介绍了恒星活动对等离子体无线电发射生成机制效率的影响以及这种发射在具有弱磁场的系外行星大气中的特性的研究结果。在朗缪尔频率超过电子回旋频率、电子回旋 maser 效率低下的情况下,等离子体产生机制可以有效实现。这种机制在很大程度上取决于等离子体参数,它表明高能电子产生等离子体(准静态)波,然后将其转化为电磁辐射。恒星风的强度不同,可以极大地改变系外行星的等离子体,并改变其参数。我们以系外行星HD 189733b与来自中心恒星的不同强度的恒星风的相互作用为例,说明等离子体机制可以在任何恒星风强度下实现,只是对等离子体机制参数的要求发生了变化。特别是,产生现代射电天文学手段可以探测到的射电通量所需的等离子体波能量密度会发生变化,其频率范围也会发生变化。后者将使探测到的射电发射被用作母星活动的指标。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

摘要图片

摘要图片

查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
Stellar Wind and the Efficiency of Plasma Radio Emission from Exoplanets

We present the results of our study of the influence of stellar activity on the efficiency of the plasma radio emission generation mechanism and the properties of this emission in the atmospheres of exoplanets with a weak magnetic field. The plasma generation mechanism can be efficiently realized in the case where the Langmuir frequency exceeds the electron gyrofrequency, and the electron cyclotron maser is inefficient. This mechanism, which depends significantly on plasma parameters, suggests the generation of plasma (quasi-static) waves by energetic electrons followed by their conversion into electromagnetic radiation. The stellar wind, depending on its intensity, can modify significantly the plasmasphere of an exoplanet and change its parameters. Using the interaction of the exoplanet HD 189733b with a stellar wind of various intensities from the central star as an example, we show that the plasma mechanism can be realized at any stellar wind intensity, only the requirements for the parameters of the plasma mechanism change. In particular, the plasma wave energy density needed to generate a radio flux accessible to detection by modern radio-astronomical means changes, and its frequency range changes. The latter will allow the detected radio emission to be used as an indicator of the activity of the parent star.

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
CiteScore
1.70
自引率
22.20%
发文量
0
审稿时长
6-12 weeks
期刊介绍: Astronomy Letters is an international peer reviewed journal that publishes the results of original research on all aspects of modern astronomy and astrophysics including high energy astrophysics, cosmology, space astronomy, theoretical astrophysics, radio astronomy, extragalactic astronomy, stellar astronomy, and investigation of the Solar system.
期刊最新文献
Confirmation of the ‘‘Lost’’ Cycle and the Gnevyshev–Ohl Rule in a Series of Sunspot Areas Spanning 410 Years Passage of a Gamma-Ray Burst through a Molecular Cloud: The Absorption of Its Afterglow in the X-ray Wavelength Range Humps on the Profiles of the Radial-Velocity Distribution and the Age of the Galactic Bar Electrostatic Energy of Multicomponent Crystal Mixtures in the Interiors of Degenerate Stars Superluminous Supernova SN 2018ibb: Circumstellar Shell and Spectral Effects
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1