Protostars and Planets VI, Heidelberg, July 15-20, 2013

Poster 2S010

Determining the Absorption towards Classical T Tauri Stars from Hydrogen Emission Lines

Rudolf, Natascha (Hamburger Sternwarte)
Günther, Moritz (Harvard-Smithsonian Center for Astrophysics)
Schneider, Christian (Hamburger Sternwarte)
Schmitt, Jürgen (Hamburger Sternwarte)
Goodman, Alyssa (Harvard-Smithsonian Center for Astrophysics)

Classical T Tauri stars (CTTS) are low-mass pre-main sequence objects surrounded by an accretion disk and still partially embedded in the parent circumstellar cloud. We observed a sample of 20 CTTS covering different ages and evolutionary stages with VLT/X-Shooter. Its wide wavelength coverage allows to simultaneously observe H I lines in the Balmer, Paschen, and Brackett series, which supposedly originate mainly from the accretion funnel. We present the results of our study of reddening in CTTS using ratios of common upper level lines. We determine new extinction values AV for several objects, but cannot find deviations from the standard parametrisation A=AV*lambda^-1.84 (Martin & Whittet 1990) of the reddening at infrared wavelengths.

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