期刊
ASTROPHYSICAL JOURNAL
卷 757, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/757/1/89
关键词
pulsars: general; pulsars: individual (J1949+3106, J1955+2527)
资金
- Region Centre in France
- NSF [AST-0807151, AST-1100968]
- NSERC
- Canada Foundation for Innovation
- CANARIE
- European Research Council for the ERC Starting Grant BEACON [279702]
- Max Planck Society
- NSERC PGS scholarship
- IMPRS fellowship
- STFC [ST/G002487/1, ST/J001562/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/J001562/1, ST/G002487/1] Funding Source: researchfish
- Direct For Mathematical & Physical Scien
- Division Of Physics [0955929] Funding Source: National Science Foundation
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [0807151] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1104617] Funding Source: National Science Foundation
We present two millisecond pulsar discoveries from the PALFA survey of the Galactic plane with the Arecibo telescope. PSR J1955+2527 is an isolated pulsar with a period of 4.87 ms, and PSR J1949+3106 has a period of 13.14 ms and is in a 1.9 day binary system with a massive companion. Their timing solutions, based on 4 years of timing measurements with the Arecibo, Green Bank, Nancay, and Jodrell Bank telescopes, allow precise determination of spin and astrometric parameters, including precise determinations of their proper motions. For PSR J1949+3106, we can clearly detect the Shapiro delay. From this we measure the pulsar mass to be 1.47-M-+0.43(0.31)circle dot, the companion mass to be 0.85(-0.11)(+0.14)M(circle dot), and the orbital inclination to be i = 79.9(+1.6)(-1.9) deg, where uncertainties correspond to +/- 1 sigma confidence levels. With continued timing, we expect to also be able to detect the advance of periastron for the J1949+3106 system. This effect, combined with the Shapiro delay, will eventually provide very precise mass measurements for this system and a test of general relativity.
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