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Accretion and outflow-related X-rays in T Tauri stars

  • Manuel Güdel (a1) (a2), Kevin Briggs (a1), Kaspar Arzner (a1), Marc Audard (a3), Jérôme Bouvier (a4), Catherine Dougados (a4), Eric Feigelson (a5), Elena Franciosini (a6), Adrian Glauser (a1), Nicolas Grosso (a4), Sylvain Guieu (a4), François Ménard (a4), Giusi Micela (a6), Jean-Louis Monin (a4), Thierry Montmerle (a4), Deborah Padgett (a7), Francesco Palla (a8), Ignazio Pillitteri (a6) (a9), Thomas Preibisch (a10), Luisa Rebull (a7), Luigi Scelsi (a6) (a9), Bruno Silva (a11), Stephen Skinner (a12), Beate Stelzer (a6) and Alessandra Telleschi (a1)...

Abstract

We report on accretion- and outflow-related X-rays from T Tauri stars, based on results from the “XMM-Newton Extended Survey of the Taurus Molecular Cloud.” X-rays potentially form in shocks of accretion streams near the stellar surface, although we hypothesize that direct interactions between the streams and magnetic coronae may occur as well. We report on the discovery of a “soft excess” in accreting T Tauri stars supporting these scenarios. We further discuss a new type of X-ray source in jet-driving T Tauri stars. It shows a strongly absorbed coronal component and a very soft, weakly absorbed component probably related to shocks in microjets. The excessive coronal absorption points to dust-depletion in the accretion streams.

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Accretion and outflow-related X-rays in T Tauri stars

  • Manuel Güdel (a1) (a2), Kevin Briggs (a1), Kaspar Arzner (a1), Marc Audard (a3), Jérôme Bouvier (a4), Catherine Dougados (a4), Eric Feigelson (a5), Elena Franciosini (a6), Adrian Glauser (a1), Nicolas Grosso (a4), Sylvain Guieu (a4), François Ménard (a4), Giusi Micela (a6), Jean-Louis Monin (a4), Thierry Montmerle (a4), Deborah Padgett (a7), Francesco Palla (a8), Ignazio Pillitteri (a6) (a9), Thomas Preibisch (a10), Luisa Rebull (a7), Luigi Scelsi (a6) (a9), Bruno Silva (a11), Stephen Skinner (a12), Beate Stelzer (a6) and Alessandra Telleschi (a1)...

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