Journal article Open Access

The quiescent X-ray emission of three transient X-ray pulsars

Alberto Moretti; Luigi Stella; G. L. Israel; Mauro Orlandini; Sergio Campana; Arvind Parmar

We report on BeppoSAX and Chandra observations of three Hard X-Ray Transients in quiescence containing fast spinning (P 10 higher, testifying that the quiescent emission mechanism is different. Pulsations were not detected in any of the sources, indicating that accretion of matter down to the neutron star surface has ceased. We conclude that the quiescent emission of the three X-ray transients likely originates from accretion onto the magnetospheric boundary in the propeller regime and/or from deep crustal heating resulting from pycnonuclear reactions during the outbursts.

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Publication date:
November 20, 2002
DOI:
10.1086/343074

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NEANIAS Space Research Community Netherlands Space and Planetary Science Astronomy and Astrophysics
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