منابع مشابه
The RV Tauri phenomenon and binarity
We present accurate radial velocity measurements on the pulsating extremely iron-deficient post-AGB object HD 52961 and the RV Tauri star EN TrA (HD 131356) proving them to be binaries. Our long-term photometric monitoring campaign shows that the RV Tauri photometric class “b” phenomenon in HD 52961 is due to variable circumstellar extinction during orbital motion. By comparing carefully the ob...
متن کاملMore light on RV Tauri variables
This study confirms the results of the preliminary study (Russell, 1997) indicating that RV Tau variables in globular clusters don’t show the kind of anomalous abundances seen in RV Tau variables observed in the field. By making comparisons with red giants in the same clusters, it has been possible, for the first time, to identify precisely how each element deviates from the normal abundance ra...
متن کاملTauri stars rotate differentially ?
We compute the rotation profile of a T Tauri star from the balance between the different components of the Reynolds stress and the meridional circulation. We first use a simple model to study the influence of the meridional flow on the differential rotation and vice versa. A more realistic model is then presented, which includes the stratification of the turbulence derived from a stellar model....
متن کاملMagnetic Braking of T Tauri Stars
We construct models for the rotation rates of T Tauri stars whose spin is regulated by magnetic linkage between the star and a surrounding accretion disc. Our models utilise a time-dependent disc code to follow the accretion process and include the eeects of pre-main-sequence stellar evolution. We nd that the initial disc mass controls the evolution of the star-disc system. For suuciently massi...
متن کاملThe nature of isolated T Tauri stars
We present the results of a search for young stellar objects around the two isolated T Tauri stars (TTSs) TW Hya and CoD−29◦8887. From the spectroscopic properties of these two objects, it is obvious that they are T Tauri stars, although they are not associated with a star-forming region as it is the case for most of the known TTSs. Especially TW Hya is the only classical TTS that is not locate...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2015
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/stv1627