期刊
ASTROPHYSICAL JOURNAL
卷 744, 期 2, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/744/2/108
关键词
Galaxy: stellar content; open clusters and associations: general; stars: massive; stars: neutron; supergiants; X-rays: binaries
资金
- Chandra X-ray Observatory Center [G08-9055X]
- National Aeronautics and Space Administration (NASA) [NAS8-03060]
We present the first direct measurement of the spatial cross-correlation function of high-mass X-ray binaries (HMXBs) and active OB star-forming complexes in the Milky Way. This result relied on a sample containing 79 hard X-ray-selected HMXBs and 458 OB associations. Clustering between the two populations is detected with a significance above 7 sigma for distances <1 kpc. Thus, HMXBs closely trace the underlying distribution of the massive star-forming regions that are expected to produce the progenitor stars of HMXBs. The average offset of 0.4 +/- 0.2 kpc between HMXBs and OB associations is consistent with being due to natal kicks at velocities of the order of 100 +/- 50 km s(-1). The characteristic scale of the correlation function suggests an average kinematical age (since the supernova phase) of similar to 4 Myr for the HMXB population. Despite being derived from a global view of our Galaxy, these signatures of HMXB evolution are consistent with theoretical expectations as well as observations of individual objects.
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