New Galactic High Mass X-ray Binaries discovered with INTEGRAL

Details New Galactic High Mass X-ray Binaries discovered with INTEGRAL New Galactic High Mass X-ray Binaries discovered with INTEGRAL

2010-10-11

arxiv.org/abs/1010.2070v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

Invited talk to appear in the Proceedings of the International Conference on Binaries "Binary Star Evolution: Mass Loss, Accre

Scientific paper

I will review the main observational properties of the new Galactic High Mass X-ray Binaries discovered by the INTEGRAL satellite in the hard energy range 17-100 keV. About 70% of the newly discovered HMXBs host OB supergiant companions and show peculiar properties with respect to classical HMXBs detected with previous missions: some of them display huge local absorptions, in excess of 1E23 cm^-2 (the so-called obscured sources), while others show fast transient X-ray emission, leading to the definition of a new sub-class of HMXBs, the so-called Supergiant Fast X-ray Transients. Their peculiar behavior is still poorly understood and represents a challenge to theory.

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