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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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