Further Study of Starspot Activity and Measurement of Differential Rotation for SZ Piscium

doi:10.3847/1538-4357/ad86bd

YNAO OpenIR > 系外行星研究组

	Further Study of Starspot Activity and Measurement of Differential Rotation for SZ Piscium
	Xiang Y(项越)1,2,3 ; Gu SH(顾盛宏)1,2,3,4 ; Cameron, A. Collier 5; Barnes, J. R.6; Cao DT(曹东涛)1,2,3
发表期刊	ASTROPHYSICAL JOURNAL
	2024-12-01
卷号	976 期号:2
DOI	10.3847/1538-4357/ad86bd
产权排序	第1完成单位
收录类别	SCI
摘要	We present a series of nine Doppler images of the magnetically active K component of the RS CVn-type binary SZ Piscium (SZ Psc), based on high-resolution spectroscopic data collected from 2014 to 2018. We apply least-squares deconvolution (LSD) to all spectra to extract the average profiles with high signal-to-noise ratios for Doppler imaging. The surface maps of the K subgiant show starspots widely distributed along its latitude and longitude. A prominent, nonaxisymmetric polar spot around phase 0 is revealed by all images with sufficient phase coverage, which may be a stable feature on the K component. The starspots evolve over a timescale of 1 month. We have determined the surface shear rate of the K component from starspot maps reconstructed 10 days apart in 2017 November-December through the cross-correlation method. The surface differential rotation parameters are Omega eq = 1.591 +/- 0.002 rad day-1 and Delta Omega = 0.035 +/- 0.003 rad day-1. The absorption lines contributed from the tertiary component of SZ Psc are detected in all LSD profiles, and we measure the radial velocity of the binary system and the tertiary component to derive an elliptical orbit with a period of 1530 +/- 3 days and a mass of 0.75 +/- 0.06 M circle dot for the tertiary component.
资助项目	MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[10373023]; MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[10773027]; MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[U1531121]; MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[11603068]; MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[11903074]; MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[12373039]; National Natural Science Foundation of China; China Manned Space Project[202201AT070186]; China Manned Space Project[202305AS350009]; Yunnan Fundamental Research Projects; Yunnan Revitalization Talent Support Program (Young Talent Project)[202302AN360001]; International Centre of Supernovae, Yunnan Key Laboratory; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences; Chinese Academy of Sciences; People's Government of Yunnan Province; Institute of Astronomy RAS in Moscow; University of Vienna
项目资助者	MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[10373023, 10773027, U1531121, 11603068, 11903074, 12373039] ; National Natural Science Foundation of China ; China Manned Space Project[202201AT070186, 202305AS350009] ; Yunnan Fundamental Research Projects ; Yunnan Revitalization Talent Support Program (Young Talent Project)[202302AN360001] ; International Centre of Supernovae, Yunnan Key Laboratory ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; Chinese Academy of Sciences ; People's Government of Yunnan Province ; Institute of Astronomy RAS in Moscow ; University of Vienna
语种	英语
学科领域	天文学 ; 恒星与银河系
文章类型	Article
出版者	IOP Publishing Ltd
出版地	TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN	0004-637X
URL	查看原文
WOS记录号	WOS:001362659800001
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	SOLAR-TYPE STARS ; CHROMOSPHERIC ACTIVITY ; PROMINENCE ACTIVITY ; EVOLUTION ; SYSTEM ; SPOTS ; ANDROMEDAE ; LIFETIMES ; KEPLER
引用统计
文献类型	期刊论文
版本	出版稿
条目标识符	http://ir.ynao.ac.cn/handle/114a53/27830
专题	系外行星研究组中国科学院天体结构与演化重点实验室
作者单位	1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People's Republic of China; [email protected], [email protected]; 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, People's Republic of China; 3.International Centre of Supernovae, Yunnan Key Laboratory, Kunming 650216, People's Republic of China; 4.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 101408, People's Republic of China; 5.School of Physics and Astronomy, University of St Andrews, Fife, KY16 9SS, UK; 6.Department of Physical Sciences, The Open University, Walton Hall, Milton Keynes, MK7 6AA, UK
第一作者单位	中国科学院云南天文台
推荐引用方式 GB/T 7714	Xiang Y,Gu SH,Cameron, A. Collier,et al. Further Study of Starspot Activity and Measurement of Differential Rotation for SZ Piscium[J]. ASTROPHYSICAL JOURNAL,2024,976(2).
APA	项越,顾盛宏,Cameron, A. Collier,Barnes, J. R.,&曹东涛.(2024).Further Study of Starspot Activity and Measurement of Differential Rotation for SZ Piscium.ASTROPHYSICAL JOURNAL,976(2).
MLA	项越,et al."Further Study of Starspot Activity and Measurement of Differential Rotation for SZ Piscium".ASTROPHYSICAL JOURNAL 976.2(2024).

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