First Chromospheric Activity and Doppler Imaging Study of PW And Using a New Doppler Imaging Code: SpotDIPy

doi:10.3847/1538-4357/ad055d

	First Chromospheric Activity and Doppler Imaging Study of PW And Using a New Doppler Imaging Code: SpotDIPy
	Bahar, Engin 6; Şenavcı, Hakan V.6; Işık, Emre 7,8; Hussain, Gaitee A. J.3; Kochukhov, Oleg 4; Montes, David 1; Xiang Y(项越)2,5
刊名	ASTROPHYSICAL JOURNAL
	2024
卷号	960 期号:1
ISSN号	0004-637X
DOI	10.3847/1538-4357/ad055d
产权排序	第7完成单位
文献子类	Article
英文摘要	Measuring the coverage of dark spots on cool stars is important to understanding how stellar magnetic activity scales with the rotation rate and convection zone depth. In this respect, it is crucial to infer surface magnetic patterns on G and K stars, to reveal solar-like stellar dynamos in action. Molecular bands serve as invaluable indicators of cool spots on the surfaces of stars, as they play a crucial role in enabling accurate assessments of the extent of spot coverage across the stellar surface. Therefore, more reliable surface images can be obtained considering the inversion of atomic lines with molecular bands. In this context, we simultaneously carry out Doppler imaging (DI) using atomic lines as well as titanium oxide band profiles of PW And (K2 V) and also investigate chromospheric activity indicators for the first time in the literature, using high-resolution spectra. The surface spot distribution obtained from the inversion process represents both atomic line and TiO-band profiles quite accurately. The chromospheric emission is also correlated with photospheric spot coverage, except during a possible flare event during the observations. We detect frequent flare activity, using TESS photometry. We also introduce a new open-source, Python-based DI code SpotDIPy that allows performing surface reconstructions of single stars using the maximum entropy method. We test the code by comparing surface reconstruction simulations with the extensively used DoTS code. We show that the surface brightness distribution maps reconstructed via both codes using the same simulated data are consistent with each other.
学科主题	天文学
URL标识	查看原文
出版地	TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
资助项目	Scientific And Technological Research Council of Turkiye (TUBIdot;TAK)[1001-115F033]; Agencia Estatal de Investigacion of the Spanish Ministerio de Ciencia e Innovacion; Swedish Research Council[2019-03548]
WOS关键词	RADIAL-VELOCITIES ; YOUNG ; STARS ; ASTROPY ; DISTRIBUTIONS ; SPECTROSCOPY ; ALGORITHM ; PACKAGE ; PROJECT ; MEMBERS
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:001128967000001
资助机构	Scientific And Technological Research Council of Turkiye (TUBIdot ; TAK)[1001-115F033] ; Agencia Estatal de Investigacion of the Spanish Ministerio de Ciencia e Innovacion[PID2019-109522GB-C5[1:4]] ; Swedish Research Council[2019-03548]
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ynao.ac.cn/handle/114a53/26455]
专题	云南天文台_系外行星研究组
作者单位	1.Departamento de Física de la Tierra y Astrofísica & IPARCOS-UCM (Instituto de Física de Partículas y del Cosmos de la UCM), Facultad de Ciencias Físicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain; 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, People's Republic of China 3.European Space Agency (ESA), European Space Research and Technology Centre (ESTEC), Keplerlaan 1, 2201 AZ Noordwijk, The Netherlands; 4.Department of Physics and Astronomy, Uppsala University, Box 516, SE-75120 Uppsala, Sweden; 5.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People's Republic of China; 6.Department of Astronomy and Space Sciences, Faculty of Science, Ankara University, Beşevler 06100, Ankara, Türkiye; enbahar@ankara.edu.tr; 7.Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg 3, D-37077 Göttingen, Germany; 8.Department of Computer Science, Turkish-German University, Beykoz 34820, Istanbul, Türkiye;
推荐引用方式 GB/T 7714	Bahar, Engin,Şenavcı, Hakan V.,Işık, Emre,et al. First Chromospheric Activity and Doppler Imaging Study of PW And Using a New Doppler Imaging Code: SpotDIPy[J]. ASTROPHYSICAL JOURNAL,2024,960(1).
APA	Bahar, Engin.,Şenavcı, Hakan V..,Işık, Emre.,Hussain, Gaitee A. J..,Kochukhov, Oleg.,...&项越.(2024).First Chromospheric Activity and Doppler Imaging Study of PW And Using a New Doppler Imaging Code: SpotDIPy.ASTROPHYSICAL JOURNAL,960(1).
MLA	Bahar, Engin,et al."First Chromospheric Activity and Doppler Imaging Study of PW And Using a New Doppler Imaging Code: SpotDIPy".ASTROPHYSICAL JOURNAL 960.1(2024).