Turn-over in pulsar spectra around 1 GHz

被引：42

作者：

Kijak, J.

Gupta, Y.

Krzeszowski, K.

机构：

[1] Univ Zielona Gora, Astron Inst, PL-65265 Zielona Gora, Poland

[2] Natl Ctr Radio Astrophys, TIFR, Pune, Maharashtra, India

来源：

ASTRONOMY & ASTROPHYSICS | 2007年 / 462卷 / 02期

关键词：

pulsars; general;

D O I：

10.1051/0004-6361:20066125

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 similar to 600 MHz.

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收藏

页码：699 / 702

页数：4

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