On the evolutionary status of Isolated Neutron Stars

Details On the evolutionary status of Isolated Neutron Stars On the evolutionary status of Isolated Neutron Stars

Nov 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010vaoa.conf..111h&link_type=abstract

"Evolution of Cosmic Objects through their Physical Activity, Proceedings of the Conference dedicated to Viktor Ambartsumian's 1

Physics

Scientific paper

ROSAT has discovered a new group of isolated neutron stars that are characterized by a soft black-body like spectra (kT ~ 40-120 eV), apparent absence of radio emission and no association with supernova remnants. So far only seven such sources are known. They exhibit X-ray pulsations with relatively long periods of the order of 10 sec. Two very different mechanisms may be envisaged to explain their properties. The neutron stars may be old and re-heated by accretion from the ISM in which case their population properties could provide information on past stellar formation and secular magnetic field decay. Alternatively, this group may be made of relatively young cooling neutron stars possibly descendant from magnetars and/or linked with recently discovered Repeating Radio Transients (RRATS). We review the last observational results and show how they can shed light on the evolutionary path of these objects within the whole class of isolated neutron stars.

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