New Observations of the Crab Nebula and Pulsar

Details New Observations of the Crab Nebula and Pulsar New Observations of the Crab Nebula and Pulsar

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010head...11.2402w&link_type=abstract

American Astronomical Society, HEAD meeting #11, #24.02; Bulletin of the American Astronomical Society, Vol. 41, p.695

Astronomy and Astrophysics

Astronomy

Scientific paper

We present a phase-resolved study of the X-ray spectrum of the Crab Pulsar, using data obtained in a special mode with the Chandra X-ray Observatory. The superb angular resolution easily enables discerning the Pulsar from the surrounding nebulosity, even at pulse minimum. We find that the Pulsar's X-ray spectral index varies sinusoidally with phase---except over the same phase range for which rather abrupt changes in optical polarization magnitude and position angle have been reported. In addition, we use the X-ray data to constrain the surface temperature for various neutron-star equations of state and atmospheres. Finally, we present new data on dynamical variations of structure within the Nebula.

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