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

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

In: Proceedings of the International Astronomical Union, 2007, vol. 3, no. S243, p. 155-162

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    Titre
    • Accretion and outflow-related X-rays in T Tauri stars
    Auteur
    • Güdel, Manuel. Paul Scherrer Institut, Würenlingen and Villigen, 5232 Villigen PSI, Switzerland email: guedel@astro.phys.ethz.ch
    • Briggs, Kevin. Paul Scherrer Institut, Würenlingen and Villigen, 5232 Villigen PSI, Switzerland email: guedel@astro.phys.ethz.ch
    • Arzner, Kaspar. Paul Scherrer Institut, Würenlingen and Villigen, 5232 Villigen PSI, Switzerland email: guedel@astro.phys.ethz.ch
    • Audard, Marc. Integral Science Data Centre, Ch. d'Ecogia 16, 1290 Versoix, and Geneva Observatory, University of Geneva, Ch. des Maillettes 51, 1290 Sauverny, Switzerland
    • Bouvier, Jérôme. Laboratoire d'Astrophysique de Grenoble, Université Joseph Fourier - CNRS, BP 53, 38041 Grenoble Cedex, France
    • Dougados, Catherine. Laboratoire d'Astrophysique de Grenoble, Université Joseph Fourier - CNRS, BP 53, 38041 Grenoble Cedex, France
    • Feigelson, Eric. Department of Astronomy & Astrophysics, Penn State University, 525 Davey Lab, University Park, PA 16802, USA
    • Franciosini, Elena. INAF - Osservatorio Astronomico di Palermo, Piazza del Parlamento 1, 90134 Palermo, Italy
    • Glauser, Adrian. Paul Scherrer Institut, Würenlingen and Villigen, 5232 Villigen PSI, Switzerland email: guedel@astro.phys.ethz.ch
    • Grosso, Nicolas. Laboratoire d'Astrophysique de Grenoble, Université Joseph Fourier - CNRS, BP 53, 38041 Grenoble Cedex, France
    • Guieu, Sylvain. Laboratoire d'Astrophysique de Grenoble, Université Joseph Fourier - CNRS, BP 53, 38041 Grenoble Cedex, France
    • Ménard, François. Laboratoire d'Astrophysique de Grenoble, Université Joseph Fourier - CNRS, BP 53, 38041 Grenoble Cedex, France
    • Micela, Giusi. INAF - Osservatorio Astronomico di Palermo, Piazza del Parlamento 1, 90134 Palermo, Italy
    • Monin, Jean-Louis. Laboratoire d'Astrophysique de Grenoble, Université Joseph Fourier - CNRS, BP 53, 38041 Grenoble Cedex, France
    • Montmerle, Thierry. Laboratoire d'Astrophysique de Grenoble, Université Joseph Fourier - CNRS, BP 53, 38041 Grenoble Cedex, France
    • Padgett, Deborah. Spitzer Science Center, California Institute of Technology, Mail Code 220-6, Pasadena, CA 91125, USA
    • Palla, Francesco. INAF - Osservatorio Astrofisico di Arcetri, Largo Enrico Fermi, 5, 50125 Firenze, Italy
    • Pillitteri, Ignazio. INAF - Osservatorio Astronomico di Palermo, Piazza del Parlamento 1, 90134 Palermo, Italy
    • Preibisch, Thomas. Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
    • Rebull, Luisa. Spitzer Science Center, California Institute of Technology, Mail Code 220-6, Pasadena, CA 91125, USA
    • Scelsi, Luigi. INAF - Osservatorio Astronomico di Palermo, Piazza del Parlamento 1, 90134 Palermo, Italy
    • Silva, Bruno. Centro de Astrofísica da Universidade do Porto, Rua das Estrelas, 4150 Porto, and Departamento de Matemática Aplicada, Faculdade de Ciêcias da Universidade do Porto, 4169 Porto, Portugal
    • Skinner, Stephen. CASA, UCB 389, University of Colorado, Boulder, CO 80309-0389, USA
    • Stelzer, Beate. INAF - Osservatorio Astronomico di Palermo, Piazza del Parlamento 1, 90134 Palermo, Italy
    • Telleschi, Alessandra. Paul Scherrer Institut, Würenlingen and Villigen, 5232 Villigen PSI, Switzerland email: guedel@astro.phys.ethz.ch
    Type de document
    • Postprint
    Langue
    • Inglese
    Publié dans
    • Proceedings of the International Astronomical Union, 2007, vol. 3, no. S243, p. 155-162. Cambridge University Press
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:301042
    Summary
    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