Results 161 to 170 of about 45,569 (296)

Magnetospheric accretion models for T Tauri stars. 1: Balmer line profiles without rotation

open access: yes, 1994
We argue that the strong emission lines of T Tauri stars are generally produced in infalling envelopes. Simple models of infall constrained to a dipolar magnetic field geometry explain many peculiarities of observed line profiles that are difficult, if ...
L. Hartmann, R. Hewett, N. Calvet
semanticscholar   +1 more source

Analytic and numerical models of the 3D multipolar magnetospheres of pre-main sequence stars

open access: yes, 2011
Traditionally models of accretion of gas on to T Tauri stars have assumed a dipole stellar magnetosphere, partly for simplicity, but also due to the lack of information about their true magnetic field topologies.
Altschuler   +67 more
core   +1 more source

Gone with the Molecular Wind: Photoevaporation in the Compact Dust Disk around CX Tau

open access: yesThe Astrophysical Journal
We present Keck NIRSPEC+AO high-resolution ( R ∼ 25,000), mid-infrared ( M -band: 4.6–5.2 μ m) spectra of the protoplanetary disk CX Tau. CX Tau provides an ideal laboratory to study inner disk chemistry in a disk where the signs of radial drift of ...
Alexa R. Anderson   +7 more
doaj   +1 more source

Spatial and kinematic properties of the forbidden emission line region of T Tauri stars

open access: yes, 1997
We have carried out a long-slit spectroscopic survey for 38 T Tauri stars (TTSs) to study the spatial and kinematic properties of their forbidden emission line (FEL) regions.
G. Hirth, R. Mundt, J. Solf
semanticscholar   +1 more source

Multi-wavelength study of a young open cluster NGC 7419

open access: yes, 2008
Using UBVRI Halpha CCD photometric observations and the archival NIR and X-ray data, we have carried out a multi-wavelength study of a young star cluster NGC 7419.
Avedisova   +88 more
core   +1 more source

Haro 5-2: A New Pre-main-sequence Quadruple Stellar System

open access: yesThe Astronomical Journal
We have discovered that the H α emission-line star Haro 5-2, located in the 3–6 Myr old Ori OB1b association, is a young quadruple system. The system has a 2+2 configuration, with an outer separation of 2.″6 and with resolved subarcsecond inner binary ...
Bo Reipurth   +11 more
doaj   +1 more source

Automated CCD photometry of T Tauri stars [PDF]

open access: bronze, 1992
Matthew J. Richter   +3 more
openalex   +1 more source

Using the Ca ii Lines in T Tauri Stars to Infer the Abundance of Refractory Elements in the Innermost Disk Region

open access: yesThe Astrophysical Journal
We present a study of the abundance of calcium in the innermost disk of 70 T Tauri stars in the star-forming regions of Chamaeleon I, Lupus, and Orion OB1b. We use calcium as a proxy for the refractory material that reaches the inner disk.
Marbely Micolta   +7 more
doaj   +1 more source

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