Turn-over in pulsar spectra around 1 GHz

Details Turn-over in pulsar spectra around 1 GHz Turn-over in pulsar spectra around 1 GHz

2006-11-14

arxiv.org/abs/astro-ph/0611445v1

Astronomy and Astrophysics

Astrophysics

4 pages, to be published in Astronomy & Astrophysics

Scientific paper

10.1051/0004-6361:20066125

The main aim is to investigate the possibility of a high frequency turn-over in the radio spectrum of pulsars. Using the GMRT, multi-frequency flux density measurements of several candidate pulsars have been carried out and their spectra have been extended to lower frequencies. We present the first direct evidence for turn-over in pulsar radio spectra at high frequencies. A total of 3 pulsars (including 2 new ones from this study) are now shown to have a turn-over frequency > 1 GHz, and one is shown to have a turn-over at ~600 MHz.

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