Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-11-30
Astrophys.J. 618 (2004) L119-L122
Astronomy and Astrophysics
Astrophysics
Accepted by ApJ Letters. 4 published pages, 3 figures and 2 tables
Scientific paper
10.1086/427776
We report the discovery during the Parkes Multibeam Pulsar Survey of PSR J1756-2251, a 28.5 ms pulsar in a relativistic binary system. Subsequent timing observations showed the pulsar to have an orbital period of 7.67 hrs and an eccentricity of 0.18. They also revealed a significant advance of periastron, 2.585+/-0.002 deg./yr. Assuming this is entirely due to general relativity implies a total system mass (pulsar plus companion) of 2.574+/-0.003 solar mass. This mass and the significant orbital eccentricity suggest that this is a double neutron star system. Measurement of the gravitational redshift, gamma, and an evaluation of the Shapiro delay shape, s, indicate a low companion mass of <1.25 solar mass. The expected coalescence time due to emission of gravitational waves is only ~1.7 Gyr substantially less than a Hubble time. We note an apparent correlation between spin period and eccentricity for normally evolving double neutron star systems.
Burgay Marta
Camilo Fernando
D'Amico Nichi
Faulkner A. J.
Hobbs George
No associations
LandOfFree
PSR J1756-2251: a new relativistic double neutron star system 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 J1756-2251: a new relativistic double neutron star system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and PSR J1756-2251: a new relativistic double neutron star system will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-13644