Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996rftu.proc..255g&link_type=abstract
International Conference on X-ray Astronomy and Astrophysics: Röntgenstrahlung from the Universe, p. 255 - 256
Astronomy and Astrophysics
Astrophysics
Supernova Remnants: Magellanic Clouds, Supernova Remnants: Pulsars, Supernova Remnants: X Rays
Scientific paper
The authors present new X-ray observations of the supernova remnant N157B. The ROSAT HRI X-ray emission from the remnant can be decomposed into a point-like source, probably representing a pulsar, a resolved nebula, likely powered by the pulsar, and a patchy shell of dimension ≡17 pc. The flat and featureless ASCA SIS spectra above ≡1.5 keV confirm the Crab-like nature of the remnant. However, at lower energies there is strong evidence for a weak thermal spectral component, which accounts for about 20% of the soft X-rays. In particular, the spectra show abundance-enhanced neon and magnesium lines at ≡0.9 and ≡1.3 keV, indicating that the remnant originates in a massive progenitor. By interpreting both the thermal spectral component and the shell as representing the remnant's outer shock, the authors infer the age of the remnant to be about 4×103yr and the energy release in the supernova about 2×1050erg.
Gotthelf Eric Van
Wang Daniel Q.
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