Magnetic activity of the solar-like star HD 140538
Magnetic activity of the solar-like star HD 140538
复制标题
类太阳恒星 HD 140538 的磁活动
DOI:
10.1051/0004-6361/201935654
复制
发表时间:
2019
影响因子:
6.5
通讯作者:
A.Schröder
中科院分区:
文献类型:
--
作者:
Mittag;M.Schmitt;J. H. M. M;Metcalfe;Hempelmann;A.Schröder
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.
DOI:
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发表时间:
1995
期刊:
影响因子:
--
作者:
Jeffrey C. Hall;G. Lockwood
通讯作者:
G. Lockwood
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.