Publications
of the
MPIfR
Optical & Infrared
Interferometry Group
Beuther, H., Kerp, J., Preibisch, Th., Stanke, Th.,
Schilke, P.
Hard X-ray emission from a young massive
star-forming cluster
Astronomy and Astrophysics, 395, 169-177 (2002)
Abstract.
We report the detection of hard X-ray emission (>2 keV) from a
number of point sources associated with the very young massive
star-forming region IRAS 19410+2336. The X-ray emission is detected
from several sources located around the central and most deeply
embedded mm continuum source, which remains undetected in the X-ray
regime. All X-ray sources have K-band counterparts, and those likely
belonging to the evolving massive cluster show near-infrared colors in
the 2MASS data indicative of pre-main-sequence stages. The X-ray
luminosities around 10^31 erg/s are at the upper end of luminosities
known for low-mass pre-main-sequence sources, and mass estimates based
on the infrared data indicate that at least some of the X-ray detected
sources are intermediate-mass objects. Therefore, we conclude that the
X-ray emission is due to intermediate-mass pre-main-sequence Herbig
Ae/Be stars or their precursors. The emission process is possibly due
to magnetic star-disk interaction as proposed for their low-mass
counterparts.
You can get this publication ...