期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 425, 期 3, 页码 2378-2385出版社
OXFORD UNIV PRESS
DOI: 10.1111/j.1365-2966.2012.21691.x
关键词
binaries: general; stars: early-type; stars: mass-loss; pulsars: general; pulsars: individual: PSR J1740-3052
资金
- Commonwealth of Australia
- Netherlands Organisation for Scientific Research (NWO)
- NSERC
- STFC [ST/G002487/1, ST/J001562/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/J001562/1, ST/G002487/1] Funding Source: researchfish
PSR J1740-3052 is a young pulsar in orbit around a companion that is most likely a B-type main-sequence star. Since its discovery more than a decade ago, data have been taken at several frequencies with instruments at the Green Bank, Parkes, Lovell and Westerbork tyelescopes. We measure scattering time-scales in the pulse profiles and dispersion measure changes as a function of binary orbital phase and present evidence that both of these vary as would be expected due to a wind from the companion star. Using pulse arrival times that have been corrected for the observed periodic dispersion measure changes, we find a timing solution spanning from 1997 November to 2011 March. This includes measurements of the advance of periastron, , and the change in the projected semimajor axis of the orbit, x , and sets constraints on the orbital geometry. From these constraints, we estimate that the pulsar received a kick of at least similar to 50 km s-1 at birth. A quasi-periodic signal is present in the timing residuals with a period of 2.2 times the binary orbital period. The origin of this signal is unclear.
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