X-rays from accretion shocks in T Tauri stars: The case of BP Tau

Details X-rays from accretion shocks in T Tauri stars: The case of BP Tau X-rays from accretion shocks in T Tauri stars: The case of BP Tau

2005-03-07

arxiv.org/abs/astro-ph/0503144v1

Astronomy and Astrophysics

Astrophysics

4 pages, 4 figures, accepted by A&A

Scientific paper

10.1051/0004-6361:200500014

We present an XMM-Newton observation of the classical T Tauri star BP Tau. In the XMM-Newton RGS spectrum the O {\sc 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.

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