Magnetospheric accretion on the T Tauri star BP Tauri
نویسندگان
چکیده
منابع مشابه
Time Dependent Magnetospheric Accretion in T Tauri Stars
We review recent observational results which suggest that magnetically channeled accretion in T Tauri stars is a highly time dependent process on timescales ranging from hours to months.
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SU Aurigae is a T Tauri star that was well monitored during the MUSICOS 96 multi-site campaign. We present the results of the spectroscopic analysis of the circumstellar environment of this star, particularly of the Hα, Hβ, Na i D and He i D3 line profiles. The signatures of modulated outflows and mass accretion events are analysed, as well as transient spectral features. We compute the cross-c...
متن کاملMagnetically modulated accretion in T Tauri stars
We examine how accretion on to T Tauri stars may be modulated by a time-dependent ‘magnetic gate’ where the inner edge of the accretion disc is disrupted by a varying stellar field. We show that magnetic field variations on time-scales ≪ 10 yr can modulate the accretion flow, thus providing a possible mechanism both for the marked photometric variability of T Tauri stars and for the possible co...
متن کاملMass Accretion onto T Tauri Stars
It is now accepted that accretion onto classical T Tauri stars is controlled by the stellar magnetosphere, yet to date most accretion models have assumed that their magnetic fields are dipolar. By considering a simple steady state accretion model with both dipolar and complex magnetic fields we find a correlation between mass accretion rate and stellar mass of the form Ṁ ∝ Mα ∗ , with our resul...
متن کاملBeat Frequency Modulation of T Tauri Accretion
A general model of magnetically controlled accretion onto T Tauri stars is presented. In this model the magnetic eld is oriented arbitrarily in relation to the star's rotation axis. The resultant interplay between the magnetic eld and accretion disc causes a variable accretion rate. The dominant timescale of this variability is the beat frequency between the stellar rotation frequency and the o...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2008
ISSN: 0035-8711,1365-2966
DOI: 10.1111/j.1365-2966.2008.13111.x