T Tauri stars
T Tauri stars : mass accretion and X ray emission
... T Tauri stars are highly variable, a feature which lead to their discovery by Joy ...young stars in various star forming regions. There are now 1700 stars with rotation period estimates ...
256
Magnetic activity and radial velocity filtering of young Suns : the weak line T Tauri stars Par 1379 and Par 2244
... weak-line T-Tauri stars (wTTSs) Par 1379 and Par 2244, within the MaTYSSE (Magnetic Topologies of Young Stars and the Survival of close-in giant Exoplanets) ...Both stars are of a ...
20
The surface magnetic activity of the weak-line T Tauri stars TWA 9Aand V1095 Sco
... line T Tauri stars (wTTSs) TWA 9A and V1095 Sco as part of a wider survey of magnetic properties and activity in weak-line T Tauri stars, called MaTYSSE (Magnetic Topologies of ...
13
Stellar energetic particle ionization in protoplanetary disks around T Tauri stars
... ical SP flux of f p (E p ≈ 10 MeV) ≈ 10 7 protons cm −2 s −1 (at 1 au) as commonly proposed for T Tauri stars and a particle energy distribution derived from measurements of solar particle events. ...
20
Modelling mid infrared molecular emission lines from T Tauri stars
... Generally speaking, strong mid-IR lines are emitted from ex- posed, irradiated molecules. In our models, such molecules ex- ist when (i) the gas / dust ratio is large, (ii) the dust is unusually transparent in the UV ...
18
Simulations of winds of weak lined T Tauri stars II : The effects of a tilted magnetosphere and planetary interactions
... Despite the existing knowledge of the surface magnetic fields in young stars, the global structure of the stel- lar magnetic field is unknown. Magnetic field extrap- olations from surface magnetograms using the ...
21
Observable Signatures of Classical T Tauri Stars Accreting in an Unstable Regime
... Time-scales of the variability exhibited by Classical T Tauri stars ranges from seconds to decades (e.g., [1], [2]). The cause of the variability in di ff erent times-scales are likely associated with ...
6
CSI 2264 : accretion process in classical T Tauri stars in the young cluster NGC 2264
... burst stars present high mass-accretion rates and optically thick inner ...Classical T Tauri stars with spot-like light curves correspond mostly to systems with a low mass-accretion rate and ...
39
Discovery of new dipper stars with K2 : a window into the inner disc region of T Tauri stars
... Several works have suggested that the photometric vari- ability of young T Tauri stars can be attributed to warps in the disk at the inner edge and/or accretion streams. Bouvier et al. (2003) suggest ...
34
Rotational periods of T Tauri stars in Taurus-Auriga, south of Taurus-Auriga, and in MBM12
... Results. We found periodic variations for most of the targets. The measured periods of the T Tauri stars range from 0.57 to 7.4 days. The photometric variation can be ascribed to rotational ...
23
Role of local absorption on the X-ray emission from MHD accretion shocks in classical T Tauri stars
... Abstract. Accretion processes onto classical T Tauri stars (CTTSs) are believed to gen- erate shocks at the stellar surface due to the impact of supersonic downflowing plasma. Although current models ...
5
Long term variability of T Tauri stars using WASP
... young stars using data from the WASP ...classical T Tauri stars (CTTS), mostly in ...young stars monitoring over a month is sufficient to constrain the total amount of variability over ...
15
Magnetic activity and hot Jupiters of young Suns : the weak line T Tauri stars V819 Tau and V830 Tau
... weak-line T Tauri stars (wTTSs) V819 Tau and V830 Tau within the MaTYSSE (Magnetic Topologies of Young Stars and the Survival of close-in giant Exoplanets) programme, involving the ESPaDOnS ...
14
Magnetic activity and hot Jupiters of young Suns: the weak line T Tauri stars V819 Tau and V830 Tau
... We further checked that the temporal variations of the RV residuals we report here do not correlate with activity (e.g., estimated from the core emission in Ca ii IRT lines, see Fig. 12), indicating that it cannot be ...
15
Understanding the water emission in the mid and far IR from protoplanetary disks around T Tauri stars
... What is still lacking after the history of modeling described above is a detailed systematic study of how the disk and stel- lar parameters affect the key water emission lines in the mid- and far-IR. We want to understand ...
30
The Multiplicity of T Tauri Stars in the Star Forming Regions Taurus Auriga and Ophiucus Scorpius: A 2 2 µm Speckle Imaging Survey
... The number of exposures on a star obtained at one time is determined by a trade off between: 1 needing enough frames to form an ensemble average for the power spectrum and bispectrum and[r] ...
253
Magnetically Controlled Accretion on the Classical T Tauri Stars GQ Lupi and TW Hydrae
... young stars, information can be obtained on the large- scale field controlling the interaction of the star with its disk and the accretion flow by measuring time series of Stokes V profiles in emission lines ...
11
Optical Spectroscopic Monitoring Observations of a T Tauri Star V409 Tau
... Ae/Be stars and some T Tauri stars with early K spectral types ...rate stars are more likely to be observed through the circumstellar disk than low mass-accretion rate ...
14
Photo-reverberation mapping of a protoplanetary accretion disk around a T Tauri star
... newborn stars suggest that protoplantary disks have an inner “ wall ” at a distance set by the disk interaction with the ...Around T Tauri stars, the size of this disk hole is expected to be ...
15
Discovery and observations of ASASSN 13db, an EX lupi type accretion event on a low mass T tauri star
... Among the defining characteristics of EXors are that they erupt every few years with variable peak luminosities, typical visual amplitudes of up to ∼4 mag, and outburst durations of a few months to a year. At minimum ...
6