EDP Sciences
Free access
Issue
A&A
Volume 408, Number 2, September III 2003
Page(s) 693 - 706
Section Formation and evolution of planetary systems
DOI http://dx.doi.org/10.1051/0004-6361:20030637


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. Piskunov

Department 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 ( $R \sim 60\,000$) 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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