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Accretion and the Evolution of T Tauri Disks
Using results and calibrations from a previous paper (Gullbring et al. 1997), we estimate disk accretion rates for preEmain-sequence stars in the Taurus and Chamaeleon I molecular cloud complexes.
Disk accretion rates for T tauri stars
We present new measurements of disk accretion rates for T Tauri stars in the Taurus molecular cloud complex. Our results are based on intermediate-resolution spectrophotometry from 3200 to 5200 A,
Infrared Array Camera (IRAC) Colors of Young Stellar Objects
We compare the infrared colors predicted by theoretical models of protostellar envelopes and protoplanetary disks with initial observations of young stellar objects made with the Infrared Array
The Mass Accretion Rates of Intermediate-Mass T Tauri Stars
We present Hubble Space Telescope ultraviolet spectra and supporting ground-based data for a sample of nine intermediate-mass T Tauri stars (IMTTSs; 1.5–4 M⊙). The targets belong to three
A Brγ Probe of Disk Accretion in T Tauri Stars and Embedded Young Stellar Objects
We report on observations of Paβ and Brγ for a sample of classical T Tauri stars in Taurus and find a tight correlation between the emission-line luminosities and the accretion luminosity as measured
We present infrared photometry obtained with the IRAC camera on the Spitzer Space Telescope of a sample of 82 pre-main-sequence stars and brown dwarfs in the Taurus star-forming region. We find a
The Disk Population of the Taurus Star-Forming Region
We have analyzed nearly all images of the Taurus star-forming region at 3.6, 4.5, 5.8, 8.0, and 24??m that were obtained during the cryogenic mission of the Spitzer Space Telescope (46 deg2) and have
We present a study of accretion in a sample of 45 young, low-mass objects in a variety of star-forming regions and young associations, about half of which are likely substellar. Based primarily on
Spectral Analysis and Classification of Herbig Ae/Be Stars
We present an analysis of the optical spectra of 75 early-type emission-line stars, many of which have been classified previously as Herbig Ae/Be (HAeBe) stars. Accurate spectral types were derived
Emission-Line Diagnostics of T Tauri Magnetospheric Accretion. I. Line Profile Observations
We present high-resolution spectra of classical T Tauri stars in Taurus in the range 5800–9000 A to critically examine the current theories of magnetospheric accretion. In this paper, we focus on the