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A&A 408, 693-706 (2003)
DOI: 10.1051/0004-6361:20030637
The photosphere and veiling spectrum of T Tauri stars
H. C. Stempels and N. PiskunovDepartment of Astronomy and Space Physics, Box 515, 751 20 Uppsala, Sweden
(Received 12 February 2003 / Accepted 22 April 2003)
Abstract
Using recent high signal-to-noise and high spectral resolution (
)
observations with VLT/UVES, we have analysed the photosphere and veiling
spectrum of five T Tauri stars. With a grid of 1-dimensional plane-parallel
hydrostatic model atmospheres from the MARCS consortium we have determined
their atmospheric properties, calculated synthetic spectra and determined the
spectrum of the veiling continuum. Our analysis of the veiling spectrum
supports the view that veiling can be represented by a combination of
continuum sources. However, for the most strongly accreting stars we find
a broad region around 5300 Å where the derived level of veiling is
consistently higher than expected from continuum sources.
Key words: stars: pre-main sequence -- stars: atmospheres -- accretion, accretion disks -- methods: numerical
Offprint request: H. C. Stempels, Eric.Stempels@astro.uu.se
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