Results 31 to 40 of about 31,062 (274)
TRACING SLOW WINDS FROM T TAURI STARS VIA LOW-VELOCITY FORBIDDEN LINE EMISSION [PDF]
, 2016 Using Keck/HIRES spectra (Δ v ∼ 7 km s−1) we analyze forbidden lines of [O i] 6300 Å, [O i] 5577 Å and [S ii] 6731 Å from 33 T Tauri stars covering a range of disk evolutionary stages.
M. Simon +8 more
semanticscholar +1 more source
Characterising the surface magnetic fields of T Tauri stars with high-resolution near-infrared spectroscopy [PDF]
Astronomy & Astrophysics, 2019 Aims. In this paper, we aim to characterise the surface magnetic fields of a sample of eight T Tauri stars from high-resolution near-infrared spectroscopy.
A. Lavail, O. Kochukhov, G. Hussain
semanticscholar +1 more source
Time-variable Jet Ejections from RW Aur A, RY Tau, and DG Tau
The Astrophysical Journal Supplement Series, 2022 We present Gemini-NIFS, Very Large Telescope-SINFONI, and Keck-OSIRIS observations of near-IR [Fe ii ] emission that are associated with well-studied jets from three active T Tauri stars—RW Aur A, RY Tau, and DG Tau—taken from 2012 to 2021.
Michihiro Takami +19 more
doaj +1 more source
Unveiling extremely veiled T Tauri stars [PDF]
Astronomy & Astrophysics, 2008 Photospheric absorption lines in classical T Tauri stars (CTTS) are weak compared to normal stars. This so-called veiling is normally identified with an excess continuous emission formed in shock-heated gas at the stellar surface below the accretion streams.
Gahm, G. F. +4 more
openaire +3 more sources
The –M disk Relationship for Herbig Ae/Be Stars: A Lifetime Problem for Disks with Low Masses?
The Astronomical Journal, 2023 The accretion of material from protoplanetary disks onto their central stars is a fundamental process in the evolution of these systems and a key diagnostic in constraining the disk lifetime. We analyze the relationship between the stellar accretion rate
Sierra L. Grant +5 more
doaj +1 more source
Spectropolarimetry of the Classical T Tauri Star T Tauri [PDF]
The Astronomical Journal, 2006 High-resolution (R ≈ 60,000) circular spectropolarimetry of the classical T Tauri star T Tau is presented. The star was observed on 1997 November 21 and 22. Analyzing 12 photospheric absorption lines, the mean longitudinal magnetic field is found to be Bz = 12 ± 35 G. The 3 σ upper limit of |Bz| ≤ 105 G.
Antoun G. Daou +2 more
openaire +1 more source
AN OPTICAL SPECTROSCOPIC STUDY OF T TAURI STARS. I. PHOTOSPHERIC PROPERTIES [PDF]
, 2014 Estimates of the mass and age of young stars from their location in the H-R diagram are limited by not only the typical observational uncertainties that apply to field stars, but also by large systematic uncertainties related to circumstellar phenomena ...
G. Herczeg, L. Hillenbrand
semanticscholar +1 more source
Mass accretion on to T Tauri stars [PDF]
Monthly Notices of the Royal Astronomical Society, 2006 17 pages, 10 figures, accepted for publication by ...
Gregory, S. G. +3 more
openaire +4 more sources
Discovery of Seven T Tauri Stars and a Brown Dwarf Candidatein the Nearby TW Hydrae Association [PDF]
, 1998 We report the discovery of five T Tauri star systems, two of which are resolved binaries, in the vicinity of the nearest known region of recent star formation: the TW Hydrae Association.
R. Webb +7 more
semanticscholar +1 more source
The Magnetic Fields of Classical T Tauri Stars [PDF]
, 2007 We report new magnetic field measurements for 14 classical T Tauri stars (CTTSs). We combine these data with one previous field determination in order to compare our observed field strengths with the field strengths predicted by magnetospheric accretion ...
C. Johns–Krull
semanticscholar +1 more source