X-rays from accretion shocks in T Tauri stars: The case of BP Tau
J. H. M. M. SchmittHamburger Sternwarte, Gojenbergsweg 112, 21029 Hamburg, Germany e-mail: [email protected]J. RobradeHamburger Sternwarte, Gojenbergsweg 112, 21029 Hamburg, Germany e-mail: [email protected]Jan‐Uwe NessUniversity of Oxford, Department of Theoretical Physics, 1 Keble Road, Oxford OX1 3NP, UKF. FavataAstrophysics Division, ESA/ESTEC, PO Box 299, 2200 AG, Noordwijk, The NetherlandsB. StelzerDipartimento di Scienze Fisiche e Astronomiche, Università di Palermo, Piazza del Parlamento 1, 90134 Palermo, Italy
2005en
ABI
Annotatsiya
We present an XMM-Newton observation of the classical T Tauri star BP Tau. In the XMM-Newton RGS spectrum the O vii triplet is clearly detected with a very weak forbidden line indicating high plasma densities and/or a high UV flux environment. At the same time concurrent UV data point to a small hot spot filling factor suggesting an accretion funnel shock as the site of the X-ray and UV emission. Together with the X-ray data on TW Hya these new observations suggest such funnels to be a general feature in classical T Tauri stars.
Hali tarjima qilinmagan
Identifikatorlar
Iqtiboslar va manbalar
2 ta iqtibos0 ta foydalanilgan manba