Magnetic variability in the young solar analog KIC 10644253 - Observations from the Kepler satellite and the HERMES spectrograph
Magnetic variability in the young solar analog KIC 10644253 - Observations from the Kepler satellite and the HERMES spectrograph
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年轻太阳模拟 KIC 10644253 中的磁变率 - 来自开普勒卫星和 HERMES 摄谱仪的观测
DOI：
10.1051/0004-6361/201527978
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发表时间：
2016
影响因子：
6.5
通讯作者：
P. Pallé
中科院分区：
文献类型：
--
作者：
D. Salabert;D. Salabert;C. Régulo;C. Régulo;R. A. García;Paul Beck;J. Ballot;J. Ballot;O. Creevey;F. P. Hernández;F. P. Hernández;J. D. D. Nascimento;J. D. D. Nascimento;E. Corsaro;E. Corsaro;E. Corsaro;R. Egeland;R. Egeland;S. Mathur;T. Metcalfe;L. Bigot;Tugdual Ceillier;P. Pallé;P. Pallé
开普勒卫星历时4年的连续光度观测为研究200万多颗恒星的恒星演化提供了数量和质量无与伦比的丰富数据。此外，数据集的长度为检测磁活动和声振荡的相关时间变化提供了独特的信息源。对此，人们对开普勒任务寄予厚望。在名义任务结束两年多后，对类太阳脉动中磁活动变化特征的搜索仍然没有成果。然而，在这里，我们报告了年轻（1 吉里）太阳模拟 KIC 10644253 的低度声频的时间变化的发现，调制约为 1.5 年，在开普勒观测期间具有显着的时间变化。这些变化与导出的光度活性一致。为 KIC 10644253 提取的频移被证明是由与太阳内部地下层相同的物理机制产生的。与此同时，根据安装在墨卡托望远镜上的 HERMES 仪器收集的补充地面高分辨率观测数据，对 KIC 10644253 进行了详细的光谱分析。它的锂丰度和色球活性？指数证实KIC 10644253是一颗比太阳更年轻、更活跃的恒星。
The continuous photometric observations collected by the Kepler satellite over 4 yr provide a wealth of data with an unequalled quantity and quality for the study of stellar evolution of more than 200 000 stars. Moreover, the length of the dataset provides a unique source of information for detecting magnetic activity and associated temporal variability in the acoustic oscillations. In this regards, the Kepler mission was awaited with great expectations. The search for the signature of magnetic activity variability in solar-like pulsations still remained unfruitful more than 2 yr after the end of the nominal mission. Here, however, we report the discovery of temporal variability in the low-degree acoustic frequencies of the young (1 Gyr-old) solar analog KIC 10644253 with a modulation of about 1.5 yr with significant temporal variations for the duration of the Kepler observations. The variations agree with the derived photometric activity. The frequency shifts extracted for KIC 10644253 are shown to result from the same physical mechanisms involved in the inner subsurface layers as in the Sun. In parallel, a detailed spectroscopic analysis of KIC 10644253 is performed based on complementary ground-based, high-resolution observations collected by the HERMES instrument mounted on the Mercator telescope. Its lithium abundance and chromospheric activity ? index confirm that KIC 10644253 is a young and more active star than the Sun.
影响因子：
6.5
作者：
T. Appourchaux;W. Chaplin;R. García;M. Gruberbauer;G. Verner;H. M. Antia;O. Benomar;T. Campante;G. Davies;S. Deheuvels;R. Handberg;S. Hekker;R. Howe;C. R'egulo;D. Salabert;T. Bedding;T. White;J. Ballot;S. Mathur;V. S. Aguirre;Y. Elsworth;S. Basu;R. Gilliland;J. Christensen-Dalsgaard;H. Kjeldsen;K. Uddin;Martin C. Stumpe;T. Barclay
通讯作者：
T. Appourchaux;W. Chaplin;R. García;M. Gruberbauer;G. Verner;H. M. Antia;O. Benomar;T. Campante;G. Davies;S. Deheuvels;R. Handberg;S. Hekker;R. Howe;C. R'egulo;D. Salabert;T. Bedding;T. White;J. Ballot;S. Mathur;V. S. Aguirre;Y. Elsworth;S. Basu;R. Gilliland;J. Christensen-Dalsgaard;H. Kjeldsen;K. Uddin;Martin C. Stumpe;T. Barclay
影响因子：
6.5
作者：
J. Ballot;J. Ballot;L. Gizon;R. Samadi;G. Vauclair;G. Vauclair;O. Benomar;O. Benomar;H. Bruntt;B. Mosser;T. Stahn;G. Verner;G. Verner;T. Campante;T. Campante;R. A. García;S. Mathur;D. Salabert;D. Salabert;D. Salabert;P. Gaulme;C. Régulo;C. Régulo;I. Roxburgh;T. Appourchaux;F. Baudin;C. Català;W. Chaplin;S. Deheuvels;Eric Michel;M. Bazot;O. Creevey;O. Creevey;N. Dolez;N. Dolez;Y. Elsworth;K. Sato;S. Vauclair;S. Vauclair;M. Auvergne;A. Baglin
通讯作者：
J. Ballot;J. Ballot;L. Gizon;R. Samadi;G. Vauclair;G. Vauclair;O. Benomar;O. Benomar;H. Bruntt;B. Mosser;T. Stahn;G. Verner;G. Verner;T. Campante;T. Campante;R. A. García;S. Mathur;D. Salabert;D. Salabert;D. Salabert;P. Gaulme;C. Régulo;C. Régulo;I. Roxburgh;T. Appourchaux;F. Baudin;C. Català;W. Chaplin;S. Deheuvels;Eric Michel;M. Bazot;O. Creevey;O. Creevey;N. Dolez;N. Dolez;Y. Elsworth;K. Sato;S. Vauclair;S. Vauclair;M. Auvergne;A. Baglin
太阳磁层变薄：可以预测特殊的太阳极小值
DOI：
10.1088/0004-637x/758/1/43
发表时间：
2012
期刊：
The Astrophysical Journal
影响因子：
--
作者：
Basu S
通讯作者：
Basu S