Radio pulsars in the Magellanic Clouds

Citation
F. Crawford et al., Radio pulsars in the Magellanic Clouds, ASTROPHYS J, 553(1), 2001, pp. 367-374
Citations number
32
Categorie Soggetti
Space Sciences
Journal title
ASTROPHYSICAL JOURNAL
ISSN journal
0004637X → ACNP
Volume
553
Issue
1
Year of publication
2001
Part
1
Pages
367 - 374
Database
ISI
SICI code
0004-637X(20010520)553:1<367:RPITMC>2.0.ZU;2-E
Abstract
We report the results of a survey of the Small Magellanic Cloud (SMC) for r adio pulsars conducted with the 20 cm multibeam receiver of the Parkes 64 m telescope. This survey targeted a more complete region of the SMC than a p revious pulsar search and had an improvement in sensitivity by a factor of about 2 for most pulsar periods. This survey is much more sensitive to fast young pulsars (with P less than or similar to 100 ms) and is the first sur vey of the SMC with any sensitivity to millisecond pulsars. Two new pulsars were discovered in the survey, one of which is located within the SMC. The number of pulsars found in the survey is consistent with the expected numb er derived using several methods. We also report the serendipitous discover y of a new pulsar in the 30 Doradus region of the Large Magellanic Cloud (L MC). These discoveries bring the total number of rotation-powered pulsars c urrently known in the Magellanic Clouds to eight. We have also made refined timing measurements for the new discoveries as well as for three previousl y known LMC pulsars. The age distribution of luminous Magellanic Cloud puls ars supports the conjecture that pulsars younger than about 5 Myr are more luminous on average than older pulsars.