EDP Sciences
Free access
Volume 508, Number 1, December II 2009
Page(s) 321 - 327
Section Stellar structure and evolution
DOI http://dx.doi.org/10.1051/0004-6361/200912995
Published online 01 October 2009
A&A 508, 321-327 (2009)
DOI: 10.1051/0004-6361/200912995

The Chandra X-ray view of the power sources in Cepheus A

P. C. Schneider, H. M. Günther, and J. H. M. M. Schmitt

Hamburger Sternwarte, Gojenbergsweg 112, 21029 Hamburg, Germany
    e-mail: [cschneider;hguenther;jschmitt]@hs.uni-hamburg.de

Received 27 July 2009 / Accepted 2 September 2009

The central part of the massive star-forming region Cepheus A contains several radio sources which indicates multiple outflow phenomena, yet the driving sources of the individual outflows have not been identified. We present a high-resolution Chandra observation of this region that shows the presence of bright X-ray sources with luminosities of $L_{\rm X} \gtrsim 10^{30}$ erg s-1, consistent with active pre-main sequence stars, while the strong absorption hampers the detection of less luminous objects. A new source has been discovered located on the line connecting H2 emission regions at the eastern and western parts of Cepheus A. This source could be the driving source of HH 168. We present a scenario relating the observed X-ray and radio emission.

Key words: stars: pre-main sequence -- stars: winds, outflows -- X-rays: stars -- stars: individual: Cep A:HW 2 -- ISM: individual objects: Cep A East

© ESO 2009