Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-12-19
Mon.Not.Roy.Astron.Soc. 325 (2001) 979
Astronomy and Astrophysics
Astrophysics
29 pages, 7 figures. Version accepted by MNRAS. Minor changes to text, to one set of calculations and to one figure. Abstract
Scientific paper
10.1046/j.1365-8711.2001.04447.x
We report on the discovery of a binary pulsar, PSR J1740-3052, during the Parkes multibeam survey. Timing observations of the 570-ms pulsar at Jodrell Bank and Parkes show that it is young, with a characteristic age of 350 kyr, and is in a 231-day, highly eccentric orbit with a companion whose mass exceeds 11 M_sun. An accurate position for the pulsar was obtained using the Australia Telescope Compact Array. Near-infrared 2.2-um observations make with the telescopes at the Siding Spring observatory reveal a late-type star coincident with the pulsar position. However, we do not believe that this star is the pulsar's companion, because a typical star of this spectral type and required mass would extend beyond the pulsar's orbit. Furthermore, the measured advance of periastron of the pulsar suggests a more compact companion, for example, a main-sequence star with radius only a few times that of the sun. Such a companion is also more consistent with the small dispersion measure variations seen near periastron. Although we cannot conclusively rule out a black-hole companion, we believe the companion is probably an early B star, making the system similar to the binary PSR J0045-7319.
Bell Jon F.
Camilo Fernando
Cannon Russell D.
Crawford Fronefield
D'Amico Nichi
No associations
LandOfFree
PSR J1740-3052 - a pulsar with a massive companion does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with PSR J1740-3052 - a pulsar with a massive companion, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and PSR J1740-3052 - a pulsar with a massive companion will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-374110