SIMBAD references

2012ApJ...744..108B - Astrophys. J., 744, 108 (2012/January-2)

Clustering between high-mass X-ray binaries and OB associations in the Milky Way.


Abstract (from CDS):

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 7σ 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. The characteristic scale of the correlation function suggests an average kinematical age (since the supernova phase) of ∼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.

Abstract Copyright:

Journal keyword(s): Galaxy: stellar content - open clusters and associations: general - stars: massive - stars: neutron - supergiants - X-rays: binaries

Simbad objects: 86

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