Surface activity of rapidly rotating stars from simultaneous X-ray and UV observations with AstroSat

IF 1.1 4区 物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS
Lalitha Sairam, Utkarsh Pathak, Kulinder Pal Singh
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引用次数: 0

Abstract

Our study focuses on analysing the coronal, transition and chromospheric activity of four rapidly rotating stars located within 50 pc in the solar neighborhood. We have used the multi-wavelength capabilities of AstroSat to investigate the outer atmospheres of AB Dor, BO Mic, DG CVn and GJ 3331. These stars, classified as M and K type active stars, are known for their short rotation periods, leading to increased surface magnetic activity. Our soft X-ray observations provide the coronal properties, such as emission measures, temperatures and elemental coronal abundances. We reported the detection of X-ray flares from AB Dor, BO Mic and DG CVn, while UV light curves reveal flares in both BO Mic and DG CVn.

Abstract Image

用AstroSat同时进行x射线和紫外线观测快速旋转恒星的表面活动
我们的研究重点是分析四颗快速旋转的恒星的日冕、过渡和色球活动,这些恒星位于太阳附近的50pc内。我们利用AstroSat的多波长功能研究了AB Dor, BO Mic, DG CVn和GJ 3331的外层大气。这些恒星被归类为M型和K型活动恒星,它们的旋转周期很短,导致表面磁活动增加。我们的软x射线观测提供了日冕的特性,如发射测量、温度和元素日冕丰度。我们报道了AB Dor, BO Mic和DG CVn的x射线耀斑的检测,而紫外光曲线显示BO Mic和DG CVn的耀斑。
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来源期刊
Journal of Astrophysics and Astronomy
Journal of Astrophysics and Astronomy 地学天文-天文与天体物理
CiteScore
1.80
自引率
9.10%
发文量
84
审稿时长
>12 weeks
期刊介绍: The journal publishes original research papers on all aspects of astrophysics and astronomy, including instrumentation, laboratory astrophysics, and cosmology. Critical reviews of topical fields are also published. Articles submitted as letters will be considered.
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