ACTIVITY ANALYSES FOR SOLAR-TYPE STARS OBSERVED WITH KEPLER. I. PROXIES OF MAGNETIC ACTIVITY
文献类型：期刊论文
| 作者 | He, Han ; Wang, Huaning; Yun, Duo
|
| 刊名 | ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
 |
| 出版日期 | 2015-11-01 |
| 卷号 | 221期号:1 |
| 关键词 | stars: activity stars: magnetic field stars: rotation stars: solar-type starspots Sun: activity |
| 英文摘要 | Light curves of solar-type stars often show gradual fluctuations due to rotational modulation by magnetic features (starspots and faculae) on stellar surfaces. Two quantitative measures of modulated light curves are employed as the proxies of magnetic activity for solar-type stars observed with Kepler telescope. The first is named autocorrelation index iAC, which describes the degree of periodicity of the light curve; the second is the effective fluctuation range of the light curve Reff, which reflects the depth of rotational modulation. The two measures are complementary and depict different aspects of magnetic activities on solar-type stars. By using the two proxies iAC and R-eff, we analyzed activity properties of two carefully selected solar-type stars observed with Kepler (Kepler ID: 9766237 and 10864581), which have distinct rotational periods (14.7 versus 6.0 days). We also applied the two measures to the Sun for a comparative study. The result shows that both the measures can reveal cyclic activity variations (referred to as i(AC)-cycle and R-eff-cycle) on the two Kepler stars and the Sun. For the Kepler star with the faster rotation rate, i(AC)-cycle and R-eff-cycle are in the same phase, while for the Sun (slower rotator), they are in the opposite phase. By comparing the solar light curve with simultaneous photospheric magnetograms, it is identified that the magnetic feature that causes the periodic light curve during solar minima is the faculae of the enhanced network region, which can also be a candidate of magnetic features that dominate the periodic light curves on the two Kepler stars. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000366620600018 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5501]  |
| 专题 | 国家天文台_太阳物理研究部 |
| 作者单位 | Chinese Acad Sci, Key Lab Solar Act, Natl Astron Observ, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | He, Han,Wang, Huaning,Yun, Duo. ACTIVITY ANALYSES FOR SOLAR-TYPE STARS OBSERVED WITH KEPLER. I. PROXIES OF MAGNETIC ACTIVITY[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2015,221(1). |
| APA | He, Han,Wang, Huaning,&Yun, Duo.(2015).ACTIVITY ANALYSES FOR SOLAR-TYPE STARS OBSERVED WITH KEPLER. I. PROXIES OF MAGNETIC ACTIVITY.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,221(1). |
| MLA | He, Han,et al."ACTIVITY ANALYSES FOR SOLAR-TYPE STARS OBSERVED WITH KEPLER. I. PROXIES OF MAGNETIC ACTIVITY".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 221.1(2015). |
入库方式： OAI收割
来源：国家天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。