Mauerhan, Jon C. and Morris, Mark R. and Muno, Michael P. and Cotera, Angela and Wang, Daniel and Dong, Hui (2011) Revealing the Population of Isolated, Massive Stars in the Central Molecular Zone. In: The Galactic Center: A Window to the Nuclear Environment of Disk Galaxies. ASP Conference Series (439). Astronomical Society of the Pacific , San Francisco, CA, pp. 86-95. ISBN 978-1-58381-758-2 http://resolver.caltech.edu/CaltechAUTHORS:20110713-081312696
Full text not available from this repository.
Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20110713-081312696
We report on the current census of isolated massive stars in the Galactic center region, including recently discovered objects. The latest discoveries were selected for their hard X-ray counterparts, detected with the Chandra X-ray Observatory; or for their Paschen-α emission-line excess, detected in narrowband images with HST/NICMOS. The confirmed stars span a wide range of massive star evolutionary stages: OIa, Of, Ofpe, LBV, WNh, WN, WNE, WC, and WCd. We suspect that the majority of the hard X-ray-emitting, massive stars we have identified are colliding-wind binaries, although some may be HMXBs. Most of the confirmed massive stars have no obvious association with the known, young stellar clusters, but some may have escaped from them. Extrapolation of their numbers suggests the existence of a massive star population, comparable in size to that contained within the clusters collectively, which could account for the integrated far-IR luminosity emerging from the central half-kiloparsec. This additional massive-star population may have been supplemented by the tidal disruption of stellar clusters, or suggests an alternate mode of isolated massive star formation operating in the Galactic center region. Future experiments will constrain their kinematics, binary characteristics, and mode of formation.
|Item Type:||Book Section|
|Additional Information:||© 2011 Astronomical Society of the Pacific.|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||13 Jul 2011 22:14|
|Last Modified:||24 Apr 2012 22:55|
Repository Staff Only: item control page