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EUV/Soft X-ray Spectra for Low B Neutron Stars

Published online by Cambridge University Press:  12 April 2016

Roger W. Romani
Affiliation:
Department of Physics, Stanford University, Stanford, CA 94305-4060, USA
Mohan Rajagopal
Affiliation:
Department of Physics, Stanford University, Stanford, CA 94305-4060, USA
Forrest J. Rogers
Affiliation:
Lawrence Livermore National Laboratory, Livermore, CA 94550, USA
Carlos A. Iglesias
Affiliation:
Lawrence Livermore National Laboratory, Livermore, CA 94550, USA

Abstract

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Recent ROSAT and EUVE detections of spin-powered neutron stars suggest that many emit ‘thermal’ radiation, peaking in the EUV/soft X-ray band. These data constrain the neutron stars’ thermal history, but interpretation requires comparison with model atmosphere computations, since emergent spectra depend strongly on the surface composition and magnetic field. As recent opacity computations show substantial change to absorption cross sections at neutron star photospheric conditions, we report here on new model atmosphere computations employing such data. The results are compared with magnetic atmosphere models and applied to PSR J0437−4715, a low field neutron star.

Type
IX. Neutron Stars
Copyright
Copyright © Kluwer 1996

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