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XMM-Newton observation of ρ Oph dark cloud

Published online by Cambridge University Press:  17 November 2003

J. Arnaud ,
N. Meunier ,
H. Ozawa ,
T. Montmerle  and
N. Grosso
H. Ozawa
Affiliation:
Service d'Astrophysique, Centre d'Études de Saclay, France : Laboratoire d'Astrophysique de Grenoble, France
T. Montmerle
Affiliation:
Service d'Astrophysique, Centre d'Études de Saclay, France : Laboratoire d'Astrophysique de Grenoble, France
N. Grosso
Affiliation:
Max-Planck-Institut für extraterrestrische Physik, Garching bei München, Germany : Laboratoire d'Astrophysique de Grenoble, France
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Abstract

We observed the ρ Ophiuchi dark cloud around core F, an active star-forming region, with the XMM-Newton observatory for 30 ks. We detected 107 X-ray sources within the 30' diameter field-of-view of the XMM-Newton observatory. We compared the positions of the XMM-Newton X-ray sources with the Chandra X-ray sources and found 43 X-ray sources detected with both satellites. We had a high rate of X-ray detection of Class I protostars of ~70%. We extracted light curves and spectra from bright 4 Class I sources, YLW16A, EL29, YLW15, and IRS51. They did not show X-ray flare during the observation time of 30 ks. Their X-ray spectra showed high temperature and heavy absorption, which is typical for Class I protostars.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 9: Magnetism and Activity of the Sun and Stars , 2003 , pp. 359
Copyright
© EAS, EDP Sciences, 2003

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