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

Published online by Cambridge University Press:  01 May 2007

Manuel Güdel ,
Kevin Briggs ,
Kaspar Arzner ,
Marc Audard ,
Jérôme Bouvier ,
Catherine Dougados ,
Eric Feigelson ,
Elena Franciosini ,
Adrian Glauser  and
Nicolas Grosso
...Show all authors
Manuel Güdel
Affiliation:
Paul Scherrer Institut, Würenlingen and Villigen, 5232 Villigen PSI, Switzerland email: [email protected] Max-Planck-Institute for Astronomy, Königstuhl 17, 69117 Heidelberg, Germany
Kevin Briggs
Affiliation:
Paul Scherrer Institut, Würenlingen and Villigen, 5232 Villigen PSI, Switzerland email: [email protected]
Kaspar Arzner
Affiliation:
Paul Scherrer Institut, Würenlingen and Villigen, 5232 Villigen PSI, Switzerland email: [email protected]
Marc Audard
Affiliation:
Integral Science Data Centre, Ch. d'Ecogia 16, 1290 Versoix, and Geneva Observatory, University of Geneva, Ch. des Maillettes 51, 1290 Sauverny, Switzerland
Jérôme Bouvier
Affiliation:
Laboratoire d'Astrophysique de Grenoble, Université Joseph Fourier – CNRS, BP 53, 38041 Grenoble Cedex, France
Catherine Dougados
Affiliation:
Laboratoire d'Astrophysique de Grenoble, Université Joseph Fourier – CNRS, BP 53, 38041 Grenoble Cedex, France
Eric Feigelson
Affiliation:
Department of Astronomy & Astrophysics, Penn State University, 525 Davey Lab, University Park, PA 16802, USA
Elena Franciosini
Affiliation:
INAF – Osservatorio Astronomico di Palermo, Piazza del Parlamento 1, 90134 Palermo, Italy
Adrian Glauser
Affiliation:
Paul Scherrer Institut, Würenlingen and Villigen, 5232 Villigen PSI, Switzerland email: [email protected]
Nicolas Grosso
Affiliation:
Laboratoire d'Astrophysique de Grenoble, Université Joseph Fourier – CNRS, BP 53, 38041 Grenoble Cedex, France
Sylvain Guieu
Affiliation:
Laboratoire d'Astrophysique de Grenoble, Université Joseph Fourier – CNRS, BP 53, 38041 Grenoble Cedex, France
François Ménard
Affiliation:
Laboratoire d'Astrophysique de Grenoble, Université Joseph Fourier – CNRS, BP 53, 38041 Grenoble Cedex, France
Giusi Micela
Affiliation:
INAF – Osservatorio Astronomico di Palermo, Piazza del Parlamento 1, 90134 Palermo, Italy
Jean-Louis Monin
Affiliation:
Laboratoire d'Astrophysique de Grenoble, Université Joseph Fourier – CNRS, BP 53, 38041 Grenoble Cedex, France
Thierry Montmerle
Affiliation:
Laboratoire d'Astrophysique de Grenoble, Université Joseph Fourier – CNRS, BP 53, 38041 Grenoble Cedex, France
Deborah Padgett
Affiliation:
Spitzer Science Center, California Institute of Technology, Mail Code 220-6, Pasadena, CA 91125, USA
Francesco Palla
Affiliation:
INAF – Osservatorio Astrofisico di Arcetri, Largo Enrico Fermi, 5, 50125 Firenze, Italy
Ignazio Pillitteri
Affiliation:
INAF – Osservatorio Astronomico di Palermo, Piazza del Parlamento 1, 90134 Palermo, Italy Dipartimento di Scienze Fisiche ed Astronomiche, Università di Palermo, Piazza del Parlamento 1, 90134 Palermo, Italy
Thomas Preibisch
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
Luisa Rebull
Affiliation:
Spitzer Science Center, California Institute of Technology, Mail Code 220-6, Pasadena, CA 91125, USA
Luigi Scelsi
Affiliation:
INAF – Osservatorio Astronomico di Palermo, Piazza del Parlamento 1, 90134 Palermo, Italy Dipartimento di Scienze Fisiche ed Astronomiche, Università di Palermo, Piazza del Parlamento 1, 90134 Palermo, Italy
Bruno Silva
Affiliation:
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
Stephen Skinner
Affiliation:
CASA, UCB 389, University of Colorado, Boulder, CO 80309-0389, USA
Beate Stelzer
Affiliation:
INAF – Osservatorio Astronomico di Palermo, Piazza del Parlamento 1, 90134 Palermo, Italy
Alessandra Telleschi
Affiliation:
Paul Scherrer Institut, Würenlingen and Villigen, 5232 Villigen PSI, Switzerland email: [email protected]
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Abstract

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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.

Keywords

Accretionstars: activitystars: coronaestars: formationstars: magnetic fieldsstars: pre–main-sequencestars: windsoutflows
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S243: Star-Disk Interaction in Young Stars , May 2007 , pp. 155 - 162
Copyright
Copyright © International Astronomical Union 2007

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