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.
@article{arxiv.astro-ph/0611445,
title = {Turn-over in pulsar spectra around 1 GHz},
author = {J. Kijak and Y. Gupta and K. Krzeszowski},
journal= {arXiv preprint arXiv:astro-ph/0611445},
year = {2009}
}
Comments
4 pages, to be published in Astronomy & Astrophysics