Flux-density spectral analysis for several pulsars and two newly identified gigahertz-peaked spectra pulsars
Abstract
In this paper, we present results from flux-density measurements for 21 pulsars over a wide frequency range, using the Giant Metrewave Radio Telescope (GMRT) and the Effelsberg telescope. Our sample was a set of mostly newly discovered pulsars from the selection of candidates for gigahertz-peaked spectra (GPS) pulsars. Using the results of our observations along with previously published data, we identify two new GPS pulsars. One of them, PSR J1740+1000, with dispersion measure (DM) of 24 pc cm-3, is the first GPS pulsar with such a low DM value. We also selected several strong candidates for objects with high-frequency turnover in their spectra, which require further investigation. We also revisit our source selection criteria for future searches for GPS pulsars.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- December 2014
- DOI:
- 10.1093/mnras/stu1905
- arXiv:
- arXiv:1409.3461
- Bibcode:
- 2014MNRAS.445.3105D
- Keywords:
-
- pulsars: general;
- pulsars: individual: J1740+1000;
- pulsars: individual: J1852-0635;
- Astrophysics - High Energy Astrophysical Phenomena;
- Astrophysics - Astrophysics of Galaxies;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 10 pages, 2 tables, 9 figures, accepted for publication in MNRAS