Results 31 to 40 of about 7,097 (207)

A Two-Dimensional Near-Infrared Speckle Imaging Survey of T Tauri Stars in Taurus and Ophiuchus [PDF]

open access: yes, 1992
We present the results of a magnitude limited (K≤8.5 mag) multiplicity survey of T Tauri stars in the two nearest star forming regions, Taurus-Auriga and Ophiuchus-Scorpius (D = 150 pc), observable from the northern hemisphere.
Ghez, A., Matthews, K., Neugebauer, G.
core   +1 more source

A deep XMM-Newton X-ray observation of the Chamaeleon I dark cloud [PDF]

open access: yes, 2006
Methods. The northern-eastern fringe of the Chameleon I dark cloud was observed with XMM-Newton, revisiting a region observed with ROSAT 15 years ago. Centered on the extended X-ray source CHXR49 we are able to resolve it into three major contributing ...
Alcalá   +27 more
core   +3 more sources

Observational Tests of Magnetospheric Accretion Models in Young Stars

open access: yesEPJ Web of Conferences, 2014
Magnetically controlled accretion of disk material onto the surface of Classical T Tauri stars is the dominant paradigm in our understanding of how these young stars interact with their surrounding disks.
Johns–Krull Christopher M.   +1 more
doaj   +1 more source

Pre-main-sequence Brackett Emitters in the APOGEE DR17 Catalog: Line Strengths and Physical Properties of Accretion Columns

open access: yesThe Astrophysical Journal, 2022
Very young ( t ≲ 10 Myr) stars possess strong magnetic fields that channel ionized gas from the interiors of their circumstellar disks to the surface of the star.
Hunter Campbell   +23 more
doaj   +1 more source

Inclination effects in T Tauri star spectra [PDF]

open access: yes, 2013
CONTEXT. Because of the presence of rotation and accretion disks, classical T Tauri stars have symmetry planes that are normally inclined relative to the plane of the sky.
Appenzeller, Immo, Bertout, Claude
core   +1 more source

Proper motion studies of outflows from Classical T Tauri stars [PDF]

open access: yesAstronomy & Astrophysics, 2007
In a previous paper (McGroarty & Ray 2004, 420, 975) we examined the environment of a number of evolved low-mass young stars, i.e. Classical T Tauri Stars, to see if they are capable of driving parsec-scale outflows. These stars - CW Tau, DG Tau, DO Tau, HV Tau C and RW Aur - were previously known to drive only "micro-jets" or small-scale outflows ...
McGroarty, F., Ray, T. P., Froebrich, D.
openaire   +2 more sources

The IC2118 association: new T Tauri stars in high-latitude molecular clouds

open access: yes, 2004
We identified new pre-main sequence stars in the region of high-latitude molecular clouds associated with the reflection nebula IC2118, around l = 208 degr and b = -27 degr. The stars were selected as T Tauri candidates in objective prism plates obtained
Alcalà   +41 more
core   +1 more source

A Hot Wind from the Classical T Tauri Stars: TW Hydrae and T Tauri [PDF]

open access: yesThe Astrophysical Journal, 2005
Spectroscopy of the infrared He I (10830A) line with KECK/NIRSPEC and IRTF/CSHELL, and of the ultraviolet C III (977A) and O VI (1032A) emission with FUSE reveals that the classical T Tauri star TW Hydrae exhibits P Cygni profiles, line asymmetries, and absorption indicative of a continuous, fast (~400 km/s), hot (~300,000 K) accelerating outflow with ...
Dupree, A. K.   +3 more
openaire   +2 more sources

Observable Signatures of Classical T Tauri Stars Accreting in an Unstable Regime

open access: yesEPJ Web of Conferences, 2014
We discuss key observational signatures of Classical T Tauri stars (CTTSs) accreting through Rayleigh-Taylor instability, which occurs at the interface between an accretion disk and a stellar magnetosphere.
Kurosawa Ryuichi, Romanova M. M.
doaj   +1 more source

X-ray emission from MP Muscae: an old classical T Tauri star [PDF]

open access: yes, 2007
We study the properties of X-ray emitting plasma of MP Mus, an old classical T Tauri star. We aim at checking whether an accretion process produces the observed X-ray emission and at deriving the accretion parameters and the characteristics of the shock ...
A. Maggio   +29 more
core   +2 more sources

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