Surface and Atmospheric Structure on the T Tauri Star V2129 Oph
- Autori: Walter, FM; Falccomio, E; Alencar, S; Argiroffi, C; Bouvier, J; Donati, JF; Getman, K; Gregory, SG; Hussain, GAJ; Ibrahimov, M; Jardine, MM; Skelly, MB
- Anno di pubblicazione: 2011
- Tipologia: eedings
- OA Link: http://hdl.handle.net/10447/76173
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.