Tauri stars
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 ...T Tauri stars with spot-like light curves correspond mostly to systems with a low mass-accretion rate and low mid-IR ...T ...
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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 this ...
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The surface magnetic activity of the weak-line T Tauri stars TWA 9Aand V1095 Sco
... 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 Young Stars ...
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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 modulation ...
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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 ...
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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 of ...
5
Magnetic activity and hot Jupiters of young Suns : the weak line T Tauri stars V819 Tau and V830 Tau
... 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 spectropolarimeter ...
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Stellar energetic particle ionization in protoplanetary disks around T Tauri stars
... young stars than coronal effects ...T Tauri stars implies an increase of their stellar energetic par- ticle (SP) ...young stars produce more powerful flares, Feigelson et ...T Tauri ...
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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 ...
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Magnetic activity and radial velocity filtering of young Suns : the weak line T Tauri stars Par 1379 and Par 2244
... 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 similar mass ...
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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 di ff ...
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Long term variability of T Tauri stars using WASP
... young stars using data from the WASP ...T Tauri stars (CTTS), mostly in ...young stars monitoring over a month is sufficient to constrain the total amount of variability over timescales up to ...
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T Tauri stars : mass accretion and X ray emission
... T Tauri stars appears to show ev- idence for X-ray emission from accretion shocks ...800 stars and find little evidence for any correlation between X-ray and optical ...
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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 ...
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Magnetically Controlled Accretion on the Classical T Tauri Stars GQ Lupi and TW Hydrae
... Table 1 gives the equivalent width of the two He i lines studied here for all our target stars. As mentioned before, previous investigators have noted that these lines often appear to have two distinct components ...
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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] ...
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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 ...
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The mysterious dimmings of the T Tauri star V1334 Tau
... We also fi nd a double-peaked H α emission line, which may be an indication of an accretion disk ( See Figure 5 ) . The H α feature has an equivalent width of ∼ 5 Å , which could be taken to mean that the star still ...
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The Physical Structure of Protoplanetary Disks: The Serpens Cluster Compared with Other Regions
... non-accreting stars (based on Hα data) in Serpens show very similar distributions in fractional disk luminosities, differing only in the brighter tail dominated by strongly accreting ...Ae/Be stars, the T ...
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Joergens, Viki (2003): The Formation of Brown Dwarfs: Fundamental properties of very young objects near and below the substellar limit. Dissertation, LMU München: Fakultät für Physik
... active stars and it is still unclear what kind of dynamo is generating the magnetic fields in ...T Tauri stars have been carried out but the rotation-activity relation in the pre-main sequence regime ...
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