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Title:
MSH 15-52 - A supernova remnant containing two compact X-ray sources
Authors:
Seward, F. D.; Harnden, F. R., Jr.; Murdin, P.; Clark, D. H.
Affiliation:
AA(Harvard-Smithsonian Center for Astrophysics, Cambride, MA), AB(Harvard-Smithsonian Center for Astrophysics, Cambride, MA), AC(Royal Greenwich Observatory, Herstmonceux, Sussex, England), AD(Science and Engineering Research Council, Rutherford Appleton Laboratory, Didcot, Oxon, England)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 267, April 15, 1983, p. 698-710. (ApJ Homepage)
Publication Date:
04/1983
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
NEBULAE, PULSARS, RADIO SOURCES (ASTRONOMY), SUPERNOVA REMNANTS, X RAY SOURCES, EMISSION SPECTRA, H ALPHA LINE, HEAO 2, INFRARED SPECTRA, INTERSTELLAR GAS, SHOCK WAVE INTERACTION, STELLAR EVOLUTION
DOI:
10.1086/160907
Bibliographic Code:
1983ApJ...267..698S

Abstract

Einstein observations show two small-diameter, bright X-ray sources within the shell of the Galactic radio supernova remnant (SNR) MSH 15-52. X-ray spectra and optical extinction indicate that both compact sources are at least as distant, 4.2 kpc, as the diffuse emission from the shell. The source closest to the middle of the remnant shows strong regular X-ray pulsations with a period of 0.150 s. The second source is associated with an optical knot within the Hα nebula RCW 89 close to the northwestern rim of the SNR. UK Schmidt telescope photographs of RCW 89 support the hypothesis that the Hα nebula is part of the whole SNR. The authors discuss various possibilities of incorporating the apparently young pulsar (characteristic age ≡1600 years), the apparently old SNR (>10,000 yr), and the bright knot into a single consistent system.

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