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

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題名:	Time variability of emission lines for four active T tauri stars. I. october-december in 2010
作者:	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
貢獻者:	理學院天文研究所
關鍵詞:	ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;Correlation;CORRELATIONS;Ejection;EMISSION;LAUNCHING;LUMINOSITY;Magnetospheres;MAIN SEQUENCE STARS;MASS;Monitoring;RESOLUTION;SPECTROPHOTOMETRY;Stellar winds;T TAURI STARS
日期:	2013-04-01
上傳時間:	2026-04-21 14:19:48 (UTC+8)
出版者:	IOP Publishing Ltd.;United States
摘要:	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
顯示於類別:	[天文研究所] 期刊論文

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