| Issue |
A&A
Volume 462, Number 2, February I 2007
|
|
|---|---|---|
| Page(s) | 699 - 702 | |
| Section | Stellar structure and evolution | |
| DOI | https://doi.org/10.1051/0004-6361:20066125 | |
| Published online | 02 November 2006 | |
Turn-over in pulsar spectra around 1 GHz
1
Institute of Astronomy, University of Zielona Góra, Lubuska 2, Zielona Góra, 65-265 Poland e-mail: jkijak@astro.ia.uz.zgora.pl
2
National Centre for Radio Astrophysics, TIFR, Pune University Campus, Pune, India
Received:
12
December
2005
Accepted:
25
October
2006
Aims.The main aim is to investigate the possibility of a high frequency turn-over in the radio spectrum of pulsars.
Methods.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.
Results.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.
Key words: pulsars: general
© ESO, 2007
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