High time resolution infrared observations of the Crab Nebula pulsar

Details High time resolution infrared observations of the Crab Nebula pulsar High time resolution infrared observations of the Crab Nebula pulsar

Aug 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...431l..43r&link_type=abstract

The Astrophysical Journal, Part 2 - Letters, vol. 431, no. 1, p. L43-L46

Astronomy and Astrophysics

Astronomy

15

Infrared Astronomy, Interstellar Extinction, Neutron Stars, Pulsars, Radio Emission, Synchrotron Radiation, Fourier Transformation, Infrared Detectors, Monte Carlo Method, Photodiodes, Photomultiplier Tubes, Pulsar Magnetospheres

Scientific paper

The Crab Nebula pulsar (PSR 0531+21) was observed in the infrared in J(1.2 micrometers), H(1.6 micrometers), K(2.2 micrometers), and a 0.9-2.5 micrometers band on the Las Campanas 2.5 m and Mount Hopkins 1.2 m telescopes. A new detector was used, called the Solid State Photomultiplier (SSPM), which allowed measurements of unprecedented time resolution (approximately 20-50 microseconds) in these bands. The infrared pulse profiles are shown to be qualitatively similar to those at ultraviolet and optical wavelengths, but the main pulse widths and the pulse/interpulse separations increase from the ultraviolet to the infrared. These observations are consistent with the predictions of the outer magnetospheric gap models of high-energy pulsar emission. No evidence was found of the infrared 'shoulder' of the main pulse or the excess infrared flux after the interpulse previously reported.

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