Details
| Original language | English |
|---|---|
| Article number | 165 |
| Journal | Astrophysical Journal |
| Volume | 881 |
| Issue number | 2 |
| Publication status | Published - 23 Aug 2019 |
Abstract
In this paper, we present the results of timing observations of PSRs J1949+3106 and J1950+2414, two binary millisecond pulsars (MSPs) discovered in data from the Arecibo ALFA pulsar survey (PALFA). The timing parameters include precise measurements of the proper motions of both pulsars, which show that PSR J1949 +3106 has a transversal motion very similar to that of an object in the local standard of rest. The timing also includes measurements of the Shapiro delay and the rate of advance of periastron for both systems. Assuming general relativity, these allow estimates of the masses of the components of the two systems; for PSR J1949+3106, the pulsar mass is Mp = 1.34-0.15 +0.17 M⊙ and the companion mass Mc = 0.81-0.05 +0.06 M⊙; for PSR J1950+2414 Mp = 1.496 ± 0.023 M⊙ and Mc = 0.280-0.004 +0.005 M⊙ (all values have 68.3% confidence limits). We use these masses and proper motions to investigate the evolutionary history of both systems: PSR J1949+3106 is likely the product of a low-kick supernova; PSR J1950+2414 is a member of a new class of eccentric MSP binaries with an unknown formation mechanism. We discuss the proposed hypotheses for the formations of these systems in light of our new mass measurements.
Keywords
- binaries: general, pulsars: general, pulsars: individual (PSR J1949+3106, PSR J1950+2414), stars: neutron
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Astronomy and Astrophysics
- Earth and Planetary Sciences(all)
- Space and Planetary Science
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In: Astrophysical Journal, Vol. 881, No. 2, 165, 23.08.2019.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Mass Measurements for Two Binary Pulsars Discovered in the PALFA Survey
AU - Zhu, W. W.
AU - Freire, P. C.C.
AU - Knispel, B.
AU - Allen, Bruce
AU - Stappers, B. W.
AU - Lyne, A. G.
AU - Chatterjee, S.
AU - Cordes, J. M.
AU - Crawford, F.
AU - Deneva, J. S.
AU - Ferdman, R. D.
AU - Hessels, J. W.T.
AU - Kaspi, V. M.
AU - Lazarus, P.
AU - Lynch, R.
AU - Ransom, S. M.
AU - Stovall, K.
AU - Donner, J. Y.
N1 - Funding Information: 2019-08-20 2019-08-23 16:43:13 cgi/release: Article released bin/incoming: New from .zip National Key RD program of China 2017YFA0402600. European Research Council FP/2007-2013/27970/337062 Chinese Academy of Science XDB23000000 11690024 11743002 1187306 National Science Foundation 1430284 Canadian Institute of Advanced Research NSERC Discovery Grants yes
PY - 2019/8/23
Y1 - 2019/8/23
N2 - In this paper, we present the results of timing observations of PSRs J1949+3106 and J1950+2414, two binary millisecond pulsars (MSPs) discovered in data from the Arecibo ALFA pulsar survey (PALFA). The timing parameters include precise measurements of the proper motions of both pulsars, which show that PSR J1949 +3106 has a transversal motion very similar to that of an object in the local standard of rest. The timing also includes measurements of the Shapiro delay and the rate of advance of periastron for both systems. Assuming general relativity, these allow estimates of the masses of the components of the two systems; for PSR J1949+3106, the pulsar mass is Mp = 1.34-0.15 +0.17 M⊙ and the companion mass Mc = 0.81-0.05 +0.06 M⊙; for PSR J1950+2414 Mp = 1.496 ± 0.023 M⊙ and Mc = 0.280-0.004 +0.005 M⊙ (all values have 68.3% confidence limits). We use these masses and proper motions to investigate the evolutionary history of both systems: PSR J1949+3106 is likely the product of a low-kick supernova; PSR J1950+2414 is a member of a new class of eccentric MSP binaries with an unknown formation mechanism. We discuss the proposed hypotheses for the formations of these systems in light of our new mass measurements.
AB - In this paper, we present the results of timing observations of PSRs J1949+3106 and J1950+2414, two binary millisecond pulsars (MSPs) discovered in data from the Arecibo ALFA pulsar survey (PALFA). The timing parameters include precise measurements of the proper motions of both pulsars, which show that PSR J1949 +3106 has a transversal motion very similar to that of an object in the local standard of rest. The timing also includes measurements of the Shapiro delay and the rate of advance of periastron for both systems. Assuming general relativity, these allow estimates of the masses of the components of the two systems; for PSR J1949+3106, the pulsar mass is Mp = 1.34-0.15 +0.17 M⊙ and the companion mass Mc = 0.81-0.05 +0.06 M⊙; for PSR J1950+2414 Mp = 1.496 ± 0.023 M⊙ and Mc = 0.280-0.004 +0.005 M⊙ (all values have 68.3% confidence limits). We use these masses and proper motions to investigate the evolutionary history of both systems: PSR J1949+3106 is likely the product of a low-kick supernova; PSR J1950+2414 is a member of a new class of eccentric MSP binaries with an unknown formation mechanism. We discuss the proposed hypotheses for the formations of these systems in light of our new mass measurements.
KW - binaries: general
KW - pulsars: general
KW - pulsars: individual (PSR J1949+3106, PSR J1950+2414)
KW - stars: neutron
UR - http://www.scopus.com/inward/record.url?scp=85072309401&partnerID=8YFLogxK
U2 - 10.48550/arXiv.1907.05046
DO - 10.48550/arXiv.1907.05046
M3 - Article
AN - SCOPUS:85072309401
VL - 881
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 2
M1 - 165
ER -