Irradiated accretion disks around neutron stars: Double-peaked spectrum

Details Irradiated accretion disks around neutron stars: Double-peaked spectrum Irradiated accretion disks around neutron stars: Double-peaked spectrum

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993pasj...45..831f&link_type=abstract

PASJ: Publications of the Astronomical Society of Japan, vol. 45, no. 6, p. 831-833

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Accretion Disks, Irradiation, Neutron Stars, X Ray Binaries, X Ray Stars, Stellar Luminosity, Ultraviolet Spectra

Scientific paper

In the outer part of the accretion disks around neutron stars irradiation heating dominates viscous heating. We found that the expected spectrum from such an irradiated disk becomes typically double-peaked. In the high-frequency part where radiation from the inner viscous disk is dominant, the observed flux Snu varies as nu Snu alpha nu4/3 and there exists one peak in the X-ray region (nu approximately 1018.5 Hz). In the low-frequency part where radiation from the outer irradiated disk is dominant, on the other hand, the flux varies as nu Snu alpha nu-2/3 and another peak appears in the ultraviolet region (nu approximately 1015-16 Hz). UV observation is the clue to detect such irradiated disks around neutron stars.

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