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Paper: Surface and Atmospheric Structure on the T Tauri Star V2129 Oph
Volume: 448, 16th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun
Page: 755
Authors: Walter, F. M.; Falccomio, E.; Alencar, S.; Argiroffi, C.; Bouvier, J.; Donati, J.-F.; Getman, K.; Gregory, S. G.; Hussain, G. A. J.; Ibrahimov, M.; Jardine, M. M.; Skelly, M. B.
Abstract: We provide an overview of a multi-wavelength observing campaign focusing on the accretion and coronal processes in the young star V2129 Oph. V2129 Oph is a classical T Tauri star with a 6.5 day rotation period in the ρ Oph star forming region. On 27–29 June 2009 we obtained two 100 ksec Chandra HETG exposures, aiming at opposite hemispheres of the star. We discuss the X-ray data elsewhere. In order to place the coronal X-ray emission in context, we obtained contemporaneous optical and near-IR photometry and high dispersion optical spectroscopy. The photometry shows the existence of dark photospheric spots. The Hα line profiles show a modulation of the mean Hα velocity and the presence of red-shifted absorption, probably from the accretion stream, at certain phases. Zeeman Doppler images reveal the presence of both a cool spot and an accreting region at similar longitudes.
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