Results 21 to 30 of about 106 (103)
The Spectral Variability of the Classical T Tauri Star DR Tauri
The Astronomical Journal, 2001 We present the analysis of 103 spectra, collected over more than a decade, of the classical T Tauri star DR Tau observed with the Hamilton echelle spectrograph at Lick Observatory. The star exhibits strong emission lines that show substantial variety and variability in their profile shapes. The emission lines show signatures of both outflow and infall,
Silvia H. P. Alencar +2 more
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The extreme T Tauri star RW Aur: accretion and outflow variability [PDF]
Astronomy & Astrophysics, 2005 We present an analysis of the classical T Tauri star RW Aur A, based on 77 echelle spectra obtained at Lick Observatory over a decade of observations. RW Aur, which has a higher than average mass accretion rate among T Tauri stars, exhibits permitted (Hα ,H β, Ca II, He I, NaD) and forbidden ((OI)6300 A) emission lines with strong variability.
Alencar, S. H. P. +3 more
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Long-term variability of T Tauri stars using WASP [PDF]
Monthly Notices of the Royal Astronomical Society, 2016 15 pages, 11 figures, accepted for publication in ...
Rigon, Laura +3 more
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Radio variability and structure of T Tauri stars
The Astronomical Journal, 1986 Observations of radio variability in V410 Tau and in HP Tau/G2 and /G3, and striking variations in the radio structure of DG Tau, are reported. The position of the radio peak of DG Tau has shown apparent motion between 1982 and 1985 along the flow axis from this star, while its morphology has varied from point-like to bipolar.
Martin Cohen, John H. Bieging
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The weak-line T Tauri star V410 Tau [PDF]
Astronomy & Astrophysics, 2003 We present the results of an intensive coordinated monitoring campaign in the optical and X-ray wavelength ranges of the low-mass, pre-main sequence star V410Tau carried out with the aim to study the relation between various indicators for magnetic activity that probe emission from different atmospheric layers: optical photometric star spot (rotation ...
Stelzer, B. +12 more
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Magnetic cycles and photometric variability of T Tauri stars [PDF]
Monthly Notices of the Royal Astronomical Society, 1995 uuencoded compressed postscript file. 8 pages including 3 figures. To appear in MNRAS.
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Spectral variability of classical T Tauri stars accreting in an unstable regime [PDF]
Monthly Notices of the Royal Astronomical Society, 2013 20 pages, 11 figures, 1 table, accepted for publication in ...
Kurosawa, Ryuichi, Romanova, Marina M.
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Simultaneous Visible and Near-Infrared Variability of Classical T Tauri Stars [PDF]
Proceedings of the International Astronomical Union, 2013 AbstractTemporal structural changes of protoplanetary disks surrounding T Tauri stars (TTSs) can cause magnitude variations of TTSs. On the other hand, variability is also expected due to cool spots and/or hot spots on the surface of the star, thus it is important to distinguish the causes of the observed variability. Our sample consists of 23 TTSs (22
Yukako Aimi +10 more
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High-resolution TNG spectra of T Tauri stars [PDF]
Astronomy & Astrophysics, 2017 15 pages, accepted by A& ...
ANTONIUCCI, Simone +8 more
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Accretion variability from minute to decade timescales in the classical T Tauri star CR Cha
Astronomy & Astrophysics, 2022 Context. Classical T Tauri stars are pre-main-sequence stars that are surrounded by a circumstellar disk from which they accrete material. The mass accretion process is essential in the formation of Sun-like stars. Although often described with simple and static models, the accretion process is inherently time variable. Aims.
Zsidi, G. +8 more
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