NIR Properties of the UCM Star-Forming Galaxies |
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Authors: | A Gil de Paz J Gallego J Zamorano A Alonso-Herrero A Argón-Salamanca |
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Institution: | (1) Physics Department, Queen Mary & Westfield College London, E1 4NS, United Kingdom;(2) Centro de Astrofísica da, Universidade do Porto Rua do Campo Alegre, 823, 4150 Porto, Portugal |
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Abstract: | We present results from a spectroscopic survey of Paβ & Brγ emission in a sample of T Tauri stars, mostly in the Taurus-Auriga
complex. Velocity resolved spectra (Δv ∼ 15 km s-1) show that, of the 41 stars observed in Paβ emission, 34% display IPC redshifted absorptions, while, of the 29 stars observed
in Brγ emission, 21% display IPC redshifted absorptions. The lines are broad (FWHM ∼ 200 km s-1) and lack blueshifted absorptions. These observations are consistent with the near infrared hydrogen lines forming predominantly
in infalling material, as suggested by magnetospheric accretion column models. Radiative transfer calculations of the Paβ
and Brγ line profiles in a very simplified, spherically symmetric situation are discussed.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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