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The Steep Spectrum Pulsar Population

Published online by Cambridge University Press:  12 April 2016

D. L. Kaplan ,
.J. M. Cordes  and
J. J. Condon
D. L. Kaplan
Affiliation:
Cornell University, Space Sciences Bldg., Ithaca, NY 14853
.J. M. Cordes
Affiliation:
Cornell University, Space Sciences Bldg., Ithaca, NY 14853
J. J. Condon
Affiliation:
NRAO, 520 Edgemont Road, Charlottesville, VA 22903

Abstract

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We have sampled the population of compact (θ ≤ 25") radio sources with spectral indices 1.5 ≤ α ≤ 3.2 (where Sv ∝ v—α) using two large scale radio surveys. This yields a statistically useful sample of 74 radio sources with S1.4GHz ≥ 2.5 mJy and S365MHZ ≥ 200 mJy. The majority of the sources appear to be extragalactic, resembling either high redshift radio galaxies or relic radio galaxies. However, six known pulsars were detected, as well as 16 sources of unknown nature that appear too small and have spectra too steep to be extragalactic. We are using VLBA, pulsar searching, optical/IR spectroscopy, and other techniques to definitively classify these sources. If any are new pulsars, they are potentially very interesting as they were missed by previous surveys.

Type
Part 1. Searching for Pulsars
Information
International Astronomical Union Colloquium , Volume 177: Pulsar Astronomy - 2000 and Beyond , 2000 , pp. 35 - 36
Copyright
Copyright © Astronomical Society of the Pacific 2000

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