ROSAT HRI Observations of the Crab Pulsar: An Improved Temperature upper limit for PSR 0531+21

Details ROSAT HRI Observations of the Crab Pulsar: An Improved Temperature upper limit for PSR 0531+21 ROSAT HRI Observations of the Crab Pulsar: An Improved Temperature upper limit for PSR 0531+21

1995-03-02

arxiv.org/abs/astro-ph/9503012v1

Astronomy and Astrophysics

Astrophysics

5 pages, uuencoded postscript, to be published in the Proceedings of the NATO Advanced Study Insitute on "Lives of the Neutron

Scientific paper

ROSAT HRI observations have been used to determine an upper limit of the Crab pulsar surface temperature from the off-pulse count rate. For a neutron star mass of 1.4 \Mo and a radius of 10 km as well as the standard distance and interstellar column density, the redshifted temperature upper limit is\/ $T_s^\infty \le 1.55\times 10^6$ K $(3\sigma)$. This is the lowest temperature upper limit obtained for the Crab pulsar so far. Slightly different values for $T_s^\infty$ are computed for the various neutron star models available in the literature, reflecting the difference in the equation of state.

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