The Orbits of the Gamma-ray Binaries LS I +61 303 and LS 5039

Autor:	Aragona, Christina, McSwain, M. Virginia, Grundstrom, Erika D., Marsh, Amber N., Roettenbacher, Rachael M., Hessler, Katelyn M., Boyajian, Tabetha S., Ray, Paul S.
Rok vydání:	2009
Předmět:	Astrophysics - High Energy Astrophysical Phenomena Astrophysics - Solar and Stellar Astrophysics
Zdroj:	Astrophys.J.698:514-518,2009
Druh dokumentu:	Working Paper
DOI:	10.1088/0004-637X/698/1/514
Popis:	LS I +61 303 and LS 5039 are two of only a handful of known high mass X-ray binaries (HMXBs) that exhibit very high energy emission in the MeV-TeV range, and these "gamma-ray binaries" are of renewed interest due to the recent launch of the Fermi Gamma-ray Space Telescope. Here we present new radial velocities of both systems based on recent red and blue optical spectra. Both systems have somewhat discrepant orbital solutions available in the literature, and our new measurements result in improved orbital elements and resolve the disagreements. The improved geometry of each orbit will aid in studies of the high energy emission region near each source. Comment: Accepted to ApJ, 13 pages, preprint2 style
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0902.4015 Zobrazit plný text záznamu View this record from Arxiv