Letter to the Editor
On the persistent X-ray emission from the soft -ray repeaters
Received 19 September 1996 / Accepted 12 November 1996
It is suggested that the persistent X-ray emission from the soft -ray repeaters is the thermal radiation of neutron stars which is enhanced by a factor of 10 or more due to the effect of a very strong magnetic field on the thermal structure of the neutron star envelope. For the thermal luminosity to be consistent with the persistent X-ray luminosity, the field strength at the neutron star surface has to be of the order of G. If it is confirmed that the soft -ray repeaters are neutron stars with negligible accretion, then the presence of such a strong magnetic field is inevitable.
Key words: gamma-rays: bursters - stars: neutron - magnetic fields - radiation mechanisms: thermal
Send offprint requests to: V.V. Usov
© European Southern Observatory (ESO) 1997
Online publication: July 8, 1998