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

Manuel Güdel, Kevin Briggs, Kaspar Arzner, Marc Audard, Jérôme Bouvier, Catherine Dougados, Eric Feigelson, Elena Franciosini, Adrian Glauser, Nicolas Grosso, Sylvain Guieu, François Ménard, Giusi Micela, Jean Louis Monin, Thierry Montmerle, Deborah Padgett, Francesco Palla, Ignazio Pillitteri, Thomas Preibisch, Luisa RebullLuigi Scelsi, Bruno Silva, Stephen Skinner, Beate Stelzer, Alessandra Telleschi

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Abstract

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.

Original languageEnglish (US)
Pages (from-to)155-162
Number of pages8
JournalProceedings of the International Astronomical Union
Volume3
Issue number1 S243
DOIs
StatePublished - Aug 1 2007

All Science Journal Classification (ASJC) codes

  • Medicine (miscellaneous)
  • Astronomy and Astrophysics
  • Nutrition and Dietetics
  • Public Health, Environmental and Occupational Health
  • Space and Planetary Science

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    Güdel, M., Briggs, K., Arzner, K., Audard, M., Bouvier, J., Dougados, C., Feigelson, E., Franciosini, E., Glauser, A., Grosso, N., Guieu, S., Ménard, F., Micela, G., Monin, J. L., Montmerle, T., Padgett, D., Palla, F., Pillitteri, I., Preibisch, T., ... Telleschi, A. (2007). Accretion and outflow-related X-rays in T Tauri stars. Proceedings of the International Astronomical Union, 3(1 S243), 155-162. https://doi.org/10.1017/S1743921307009519