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Some Constraints on Neutron Star Properties from Gamma Ray Burster Observations

Published online by Cambridge University Press:  04 August 2017

K. Hurley
K. Hurley*
Affiliation:
Centre d'Etude Spatiale des Rayonnements (CNRS-UPS), B.P. 4346, 31029 Toulouse Cedex, France

Abstract

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The results of recent soft X-ray and optical searches for quiescent gamma ray burster counterparts are used to constrain the properties of the neutron stars responsible for bursters. Ages are restricted to the range 2×105 y and above based on temperature upper limits and theoretical cooling curves, or 107 y and above if bursters have evolved from pulsars. Velocities are greater than 20 km/s if the neutron stars are unmagnetized. Practically no main sequence star could have escaped detection in the optical/IR searches, so if the neutron stars are in binary systems, the companion is most likely a degenerate, low mass, low temperature object.

Type
VI. Other Manifestations of Neutron Stars and Their Place in Neutron Star Evolution
Information
Symposium - International Astronomical Union , Volume 125: The Origin and Evolution of Neutron Stars , 1987 , pp. 489 - 500
Copyright
Copyright © Reidel 1987 

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