Time variability of emission lines for four active T tauri stars. I. october-december in 2010

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/100970

Title:	Time variability of emission lines for four active T tauri stars. I. october-december in 2010
Authors:	陳文屏;Chou, Mei-Yin;Takami, Michihiro;Manset, Nadine;Beck, Tracy;Pyo, Tae-Soo;Chen, Wen-Ping;Panwar, Neelam;Karr, Jennifer L.;Shang, Hsien;Liu, Hauyu Baobab
Contributors:	理學院天文研究所
Keywords:	ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;Correlation;CORRELATIONS;Ejection;EMISSION;LAUNCHING;LUMINOSITY;Magnetospheres;MAIN SEQUENCE STARS;MASS;Monitoring;RESOLUTION;SPECTROPHOTOMETRY;Stellar winds;T TAURI STARS
Date:	2013-04-01
Issue Date:	2026-04-21 14:19:48 (UTC+8)
Publisher:	IOP Publishing Ltd.;United States
Abstract:	摘要： We present optical spectrophotometric monitoring of four active T Tauri stars (DG Tau, RY Tau, XZ Tau, RW Aur A) at high spectral resolution (R [gap] 1 x 10 super(4)), to investigate the correlation between time variable mass ejection seen in the jet/wind structure of the driving source and time variable mass accretion probed by optical emission lines. This may allow us to constrain the understanding of the jet/wind launching mechanism, the location of the launching region, and the physical link with magnetospheric mass accretion. In 2010, observations were made at six different epochs to investigate how daily and monthly variability might affect such a study. We perform comparisons between the line profiles we observed and those in the literature over a period of decades and confirm the presence of time variability separate from the daily and monthly variability during our observations. This is so far consistent with the idea that these line profiles have a long-term variability (3-20 yr) related to episodic mass ejection suggested by the structures in the extended flow components. We also investigate the correlations between equivalent widths and between luminosities for different lines. We find that these correlations are consistent with the present paradigm of steady magnetospheric mass accretion and emission line regions that are close to the star. 出版者： United States 出版日期： 2013-04-01 出處： The Astronomical journal, 2013-04, Vol.145 (4), p.108-14 資源來源： IOP Journals 識別號： ISSN: 0004-6256 識別號： ISSN: 1538-3881 識別號： EISSN: 1538-3881 識別號： DOI: 10.1088/0004-6256/145/4/108
Appears in Collections:	[Graduate Institute of Astronomy] journal & Dissertation

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