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

1995/03/02 by Becker, W., Aschenbach, B.
#Astrophysics (astro-ph) #FOS: Physical sciences

paper · doi:10.48550/arxiv.astro-ph/9503012

Abstract

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^∞ ≤ 1.55× 10⁶ K (3σ). This is the lowest temperature upper limit obtained for the Crab pulsar so far. Slightly different values for T_s^∞ are computed for the various neutron star models available in the literature, reflecting the difference in the equation of state.

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