Magnetic activity of the solar-like star HD 140538

Magnetic activity of the solar-like star HD 140538
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类太阳恒星 HD 140538 的磁活动

DOI:
10.1051/0004-6361/201935654
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发表时间:
2019
影响因子:
6.5
通讯作者:
A.Schröder
A.Schröder
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Mittag;M.Schmitt;J. H. M. M;Metcalfe;Hempelmann;A.Schröder

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自转周期和活动周期是晚型主序星中磁发电机最重要的特性之一。本文给出了类太阳星星HD 140538的SMWO指数时间序列,并推导出其活动周期为3.88 ± 0.02年。此外,我们还分析了TIGRE望远镜拍摄的高节奏、季节性的SMWO资料,发现其自转周期为20.71 ± 0.32天。此外,我们通过匹配的演化轨迹估计HD 140538的恒星年龄为3.7 Gyrs。这比根据上述自转周期以及活动-年龄关系从陀螺年代学获得的年龄稍大。这些结果,加上它的恒星参数与年轻太阳非常相似,使HD 140538成为我们了解太阳活动及其随时间演化的相关案例研究。
The periods of rotation and activity cycles are among the most important properties of the magnetic dynamo thought to be operating in late-type, main-sequence stars. In this paper, we present aSMWO-index time series composed from different data sources for the solar-like star HD 140538 and derive a period of 3.88 ± 0.02 yr for its activity cycle. Furthermore, we analyse the high-cadence, seasonalSMWOdata taken with the TIGRE telescope and find a rotational period of 20.71 ± 0.32 days. In addition, we estimate the stellar age of HD 140538 as 3.7 Gyrs via a matching evolutionary track. This is slightly older than the ages obtained from gyrochronology based on the above rotation period, as well as the activity-age relation. These results, together with its stellar parameters that are very similar to a younger Sun, make HD 140538 a relevant case study for our understanding of solar activity and its evolution with time.
太阳恒星摄谱仪:项目描述、数据校准和初步结果
DOI: --
发表时间: 1995
期刊:
影响因子: --
作者:
Jeffrey C. Hall;G. Lockwood
通讯作者: G. Lockwood
太阳和四个太阳双胞胎的色层活动和进化年龄
DOI: 10.1051/0004-6361/201527542
发表时间: 2016
期刊: arXiv: Solar and Stellar Astrophysics
影响因子: --
作者:
M. Mittag;Klaus;A. Hempelmann;J. N. Gonz'alez;J. W. H. Sternwarte;U. Hamburg;Gojenbergsweg 112;21029 Hamburg;H Germany;D. D. Astronomia;U. Guanajuato;Mexico.
通讯作者: Mexico.