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  Solar-type Stars Observed by LAMOST and Kepler

Zhang, J., Shapiro, A., Bi, S., Xiang, M., Reinhold, T., Sowmya, K., et al. (2020). Solar-type Stars Observed by LAMOST and Kepler. The Astrophysical Journal Letters, 894(1): L11. doi:10.3847/2041-8213/ab8795.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-53B2-3 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-53B3-2
Genre: Journal Article

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 Creators:
Zhang, Jinghua, Author
Shapiro, Alexander1, 2, Author              
Bi, Shaolan, Author
Xiang, Maosheng, Author
Reinhold, Timo2, Author              
Sowmya, Krishnamurthy2, Author
Li, Yaguang, Author
Li, Tanda, Author
Yu, Jie1, Author
Du, Minghao, Author
Zhang, Xianfei, Author
Affiliations:
1Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832289              
2ERC Starting Grant: Connecting Solar and Stellar Variabilities (SOLVe), Max Planck Institute for Solar System Research, Max Planck Society, ou_3164811              

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Free keywords: Stellar activity ; Stellar photometry ; Stellar rotation ; Stellar spectral lines ; Solar activity
 Abstract: Obtaining measurements of chromospheric and photometric activity of stars with near-solar fundamental parameters and rotation periods is important for a better understanding of solar–stellar connection. We select a sample of 2603 stars with near-solar fundamental parameters from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST)-Kepler field and use LAMOST spectra to measure their chromospheric activity and Kepler light curves to measure their photospheric activity (i.e., the amplitude of the photometric variability). While the rotation periods of 1556 of these stars could not be measured due to the low amplitude of the photometric variability and highly irregular temporal profile of light curves, 254 stars were further identified as having near-solar rotation periods. We show that stars with near-solar rotation periods have chromospheric activities that are systematically higher than stars with undetected rotation periods. Furthermore, while the solar level of photospheric and chromospheric activity appears to be typical for stars with undetected rotation periods, the Sun appears to be less active than most stars with near-solar rotation periods (both in terms of photospheric and chromospheric activity).

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Language(s): eng - English
 Dates: 2020
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.3847/2041-8213/ab8795
 Degree: -

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Title: The Astrophysical Journal Letters
  Other : Astrophys. J. Lett.
Source Genre: Journal
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Publ. Info: Chicago, IL : University of Chicago Press for the American Astronomical Society
Pages: - Volume / Issue: 894 (1) Sequence Number: L11 Start / End Page: - Identifier: ISSN: 0004-637X
CoNE: https://pure.mpg.de/cone/journals/resource/954922828215