Discovery of Radio Pulsations from the X-Ray Pulsar J0205+6449 in Supernova Remnant 3C 58 with the Green Bank Telescope
Abstract
We report the discovery with the 100 m Green Bank Telescope of 65 ms radio pulsations from the X-ray pulsar J0205+6449 at the center of supernova remnant 3C 58, making this possibly the youngest radio pulsar known. From our observations at frequencies of 820 and 1375 MHz, the free-electron column density to PSR J0205+6449 is found to be 140.7+/-0.3 cm-3 pc. The barycentric pulsar period P and period derivative P determined from a phase-coherent timing solution are consistent with the values previously measured from X-ray observations. The averaged radio profile of PSR J0205+6449 consists of one sharp pulse of width ~3 ms ~ 0.05P. The pulsar is an exceedingly weak radio source, with a pulse-averaged flux density in the 1400 MHz band of ~45 μJy and a spectral index of ~-2.1. Its radio luminosity of ~0.5 mJy kpc2 at 1400 MHz is lower than that of ~99% of known pulsars and is the lowest among known young pulsars.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- May 2002
- DOI:
- 10.1086/341178
- arXiv:
- arXiv:astro-ph/0204219
- Bibcode:
- 2002ApJ...571L..41C
- Keywords:
-
- ISM: Individual: Alphanumeric: 3C 58;
- Stars: Pulsars: Individual: Alphanumeric: PSR J0205+6449;
- ISM: Supernova Remnants;
- Astrophysics
- E-Print:
- 5 pages, 2 included figures, accepted for publication by ApJ Letters