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Astron. Astrophys. 339, 70-74 (1998)

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Contribution of accretion to the soft X-rays from SN 1987A at the later phase

H. Wu , J.S. Deng , J.R. Shi and J.H. You

Institute for Space Astrophysics, Department of Applied Physics, Shanghai Jiaotong University, Shanghai 200030, P.R.China

Received 15 January 1998 / Accepted 15 June 1998


Based on the accretion model presented in our previous paper (Wu et al. 1998), which gives a satisfactory explanation for the evolution of the bolometric luminosity of SN 1987A in a later phase, we infer that the observed soft X-ray flux also originates from the accretion of the central neutron star. The result of the model calculations is in good agreement with the observed X-ray light curve of SN 1987A. Our calculations show the long-term behavior of the X-ray flux which increases with time until age [FORMULA], and thenceforth begins to decline slowly.

Key words: accretion, accretion disks – supernovae: individual: SN 1987A – stars: neutron – X-rays: star – radiation mechanisms: thermal

Send offprint requests to: J.H. You

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© European Southern Observatory (ESO) 1998

Online publication: September 30, 1998