Magnetic topologies of two weak-line T Tauri stars TAP 4 and TAP 40

doi:10.1093/mnras/stad363

YNAO OpenIR > 系外行星研究组

	Magnetic topologies of two weak-line T Tauri stars TAP 4 and TAP 40
	Xiang Y(项越)1,2 ; Gu SH(顾盛宏)1,2,3 ; Donati, J.-F.4; Hussain, G. A.5; Cameron, A. Collier 6
发表期刊	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2023-02-15
卷号	520 期号:3 页码:3964-3973
DOI	10.1093/mnras/stad363
产权排序	第1完成单位
收录类别	SCI ; EI
关键词	techniques: polarimetric stars: imaging stars: magnetic fields stars: individual: TAP 4 stars: individual: TAP 40
摘要	We present a Zeeman-Doppler imaging study of two weak-line T Tauri stars TAP 4 and TAP 40, based on the high-resolution spectropolarimetric observations with ESPaDOnS at the Canada-France-Hawaii Telescope in November 2013, in the framework of the Magnetic Topologies of Young Stars and Survival of close-in giant Exoplanets large programme. We apply two Zeeman-Doppler imaging codes to the Stokes I and V profiles to reconstruct their brightness and large-scale magnetic field images. The results given by the two imaging codes are in good agreement with each other. TAP 4 shows a large polar cool spot and several intermediate-latitude warm spots on its surface, whereas TAP 40 exhibits very weak variations in its Stokes I profiles, suggesting a mostly unspotted photosphere. We detect Zeeman signatures in the Stokes V profiles of both stars. The reconstructed magnetic maps reveal dominantly toroidal fields, which enclose about 60 percent of the total magnetic energy for both TAP 4 and TAP 40. Both stars show prominent circular ring features of the azimuthal magnetic field. We derive a solar-like surface differential rotation on TAP 4 from the tomographic modelling. The brightness image of TAP 4 is used to predict the radial velocity (RV) jitters induced by its activity. After filtering out the activity jitter, the rms of its RVs is reduced from 1.7 to 0.2 km s(-1), but we do not detect any periodic signals in the filtered RVs of TAP 4, implying that it is unlikely to host a close-in exoplanet more massive than similar to 3.5M(Jup) at 0.1 au.
资助项目	National Natural Science Foundation of China[10373023] ; National Natural Science Foundation of China[10773027] ; National Natural Science Foundation of China[11603068] ; National Natural Science Foundation of China[11903074] ; National Natural Science Foundation of China[U1531121]
项目资助者	National Natural Science Foundation of China[10373023, 10773027, U1531121, 11603068, 11903074] ; China Manned Space Project[CMS-CSST-2021-B07] ; European Research Council (ERC) under the H2020 research & innovation programme[740651]
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	OXFORD UNIV PRESS
出版地	GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN	0035-8711
URL	查看原文
WOS记录号	WOS:001043810000013
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	DIFFERENTIAL ROTATION ; ACTIVE STARS ; YOUNG SUNS ; PHOTOMETRIC VARIABILITY ; HOT JUPITER ; AB-DORADUS ; FIELDS ; EVOLUTION ; PATTERNS ; BINARY
EI入藏号	20232014101119
EI主题词	Stars
EI分类号	657.2 Extraterrestrial Physics and Stellar Phenomena - 701.2 Magnetism: Basic Concepts and Phenomena - 723.2 Data Processing and Image Processing - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ynao.ac.cn/handle/114a53/26027
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, China; 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, 650216, China; 3.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing, 101408, China; 4.IRAP, Université de Toulouse, CNRS, UPS, CNES, Toulouse, F-31400, France; 5.Science Division, European Space Research and Technology Centre (ESA/ESTEC), Keplerlaan 1, Noordwijk, NL-2201 AZ, Netherlands; 6.School of Physics and Astronomy, University of St Andrews, Fife, KY16 9SS, United Kingdom
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,Donati, J.-F.,et al. Magnetic topologies of two weak-line T Tauri stars TAP 4 and TAP 40[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2023,520(3):3964-3973.
APA	Xiang Y,Gu SH,Donati, J.-F.,Hussain, G. A.,&Cameron, A. Collier.(2023).Magnetic topologies of two weak-line T Tauri stars TAP 4 and TAP 40.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,520(3),3964-3973.
MLA	Xiang Y,et al."Magnetic topologies of two weak-line T Tauri stars TAP 4 and TAP 40".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 520.3(2023):3964-3973.

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