منابع مشابه
Rotational modulation of X-ray flares on late-type stars: T Tauri stars and Algol
We present evidence for rotational modulation of Xray flares by an analysis of four outbursts on late-type stars. Two of the flares we discuss are found in ROSAT observations of T Tauri Stars and were obtained between September and October 1991. A flare on the T Tauri Star V773 Tau was observed by ASCA in September 1995. To this sample we add a Ginga observation of a flare on Algol observed in ...
متن کاملA spectroscopic study of flares on T Tauri and zero-age main-sequence stars
Using a multi-object spectrograph on the Schmidt telescope in Tautenburg, we study the flare-activity of T Tauri stars and of zero-age main sequence stars. The sample comprises both classical, and weak-line T Tauri stars (cTTSs, wTTSs) in the Taurus-Auriga star forming region, as well as zero-age mainsequence stars (ZAMSSs) in the open cluster α Persei. The properties of the flares detected on ...
متن کاملASTRONOMY AND ASTROPHYSICS Rotational modulation of X-ray flares on late-type stars: T Tauri Stars and Algol
We present evidence for rotational modulation of Xray flares by an analysis of four outbursts on late-type stars. Two of the flares we discuss are found in ROSAT observations of T Tauri Stars and were obtained between September and October 1991. A flare on the T Tauri Star V773 Tau was observed by ASCA in September 1995. To this sample we add a Ginga observation of a flare on Algol observed in ...
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 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...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1990
ISSN: 0074-1809
DOI: 10.1017/s0074180900187728