Details
| Original language | English |
|---|---|
| Article number | L1 |
| Number of pages | 5 |
| Journal | Astrophysical Journal Letters |
| Volume | 732 |
| Issue number | 1 |
| Early online date | 6 Apr 2011 |
| Publication status | Published - 1 May 2011 |
Abstract
We report the discovery of the 20.7ms binary pulsar J1952+2630, made using the distributed computing project Einstein@Home in Pulsar ALFA survey observations with the Arecibo telescope. Follow-up observations with the Arecibo telescope confirm the binary nature of the system. We obtain a circular orbital solution with an orbital period of 9.4hr, a projected orbital radius of 2.8lt-s, and a mass function of f = 0.15 M⊙ by analysis of spin period measurements. No evidence of orbital eccentricity is apparent; we set a 2σ upper limit e ≲ 1.7 × 10-3. The orbital parameters suggest a massive white dwarf companion with a minimum mass of 0.95 M⊙, assuming a pulsar mass of 1.4 M⊙. Most likely, this pulsar belongs to the rare class of intermediate-mass binary pulsars. Future timing observations will aim to determine the parameters of this system further, measure relativistic effects, and elucidate the nature of the companion star.
Keywords
- pulsars: general, stars: neutron, white dwarfs
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 Letters, Vol. 732, No. 1, L1, 01.05.2011.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Arecibo PALFA survey and Einstein@Home
T2 - Binary pulsar discovery by volunteer computing
AU - Knispel, B.
AU - Lazarus, P.
AU - Allen, B.
AU - Anderson, D.
AU - Aulbert, C.
AU - Bhat, N. D.R.
AU - Bock, O.
AU - Bogdanov, S.
AU - Brazier, A.
AU - Camilo, F.
AU - Chatterjee, S.
AU - Cordes, J. M.
AU - Crawford, F.
AU - Deneva, J. S.
AU - Desvignes, G.
AU - Fehrmann, H.
AU - Freire, P. C.C.
AU - Hammer, D.
AU - Hessels, J. W.T.
AU - Jenet, F. A.
AU - Kaspi, V. M.
AU - Kramer, M.
AU - Van Leeuwen, J.
AU - Lorimer, D. R.
AU - Lyne, A. G.
AU - MacHenschalk, B.
AU - McLaughlin, M. A.
AU - Messenger, C.
AU - Nice, D. J.
AU - Papa, M. A.
AU - Pletsch, H. J.
AU - Prix, R.
AU - Ransom, S. M.
AU - Siemens, X.
AU - Stairs, I. H.
AU - Stappers, B. W.
AU - Stovall, K.
AU - Venkataraman, A.
N1 - This work was supported by CFI, CIFAR, FQRNT, MPG, NAIC, NRAO, NSERC, NSF, NWO, and STFC. Arecibo is operated by the National Astronomy and Ionosphere Center under a cooperative agreement with the NSF. This work was supported by NSF grant AST 0807151 to Cornell University. Pulsar research at UBC is supported by an NSERC Discovery Grant and by the CFI. UWM and U. C. Berkeley acknowledge support by NSF grant 0555655. B.K. gratefully acknowledges the support of the Max Planck Society. F.C. acknowledges support from NSF grant AST-0806942. J.W.T.H. is a Veni Fellow of the Netherlands Foundation for Scientific Research (NWO). J.v.L. is supported by EC grant FP7-PEOPLE-2007-4-3-IRG 224838. D.R.L. and M.A.M. acknowledge support from a Research Challenge Grant from WVEPSCoR. D.J.N.
PY - 2011/5/1
Y1 - 2011/5/1
N2 - We report the discovery of the 20.7ms binary pulsar J1952+2630, made using the distributed computing project Einstein@Home in Pulsar ALFA survey observations with the Arecibo telescope. Follow-up observations with the Arecibo telescope confirm the binary nature of the system. We obtain a circular orbital solution with an orbital period of 9.4hr, a projected orbital radius of 2.8lt-s, and a mass function of f = 0.15 M⊙ by analysis of spin period measurements. No evidence of orbital eccentricity is apparent; we set a 2σ upper limit e ≲ 1.7 × 10-3. The orbital parameters suggest a massive white dwarf companion with a minimum mass of 0.95 M⊙, assuming a pulsar mass of 1.4 M⊙. Most likely, this pulsar belongs to the rare class of intermediate-mass binary pulsars. Future timing observations will aim to determine the parameters of this system further, measure relativistic effects, and elucidate the nature of the companion star.
AB - We report the discovery of the 20.7ms binary pulsar J1952+2630, made using the distributed computing project Einstein@Home in Pulsar ALFA survey observations with the Arecibo telescope. Follow-up observations with the Arecibo telescope confirm the binary nature of the system. We obtain a circular orbital solution with an orbital period of 9.4hr, a projected orbital radius of 2.8lt-s, and a mass function of f = 0.15 M⊙ by analysis of spin period measurements. No evidence of orbital eccentricity is apparent; we set a 2σ upper limit e ≲ 1.7 × 10-3. The orbital parameters suggest a massive white dwarf companion with a minimum mass of 0.95 M⊙, assuming a pulsar mass of 1.4 M⊙. Most likely, this pulsar belongs to the rare class of intermediate-mass binary pulsars. Future timing observations will aim to determine the parameters of this system further, measure relativistic effects, and elucidate the nature of the companion star.
KW - pulsars: general
KW - stars: neutron
KW - white dwarfs
UR - http://www.scopus.com/inward/record.url?scp=79955623614&partnerID=8YFLogxK
U2 - 10.48550/arXiv.1102.5340
DO - 10.48550/arXiv.1102.5340
M3 - Article
AN - SCOPUS:79955623614
VL - 732
JO - Astrophysical Journal Letters
JF - Astrophysical Journal Letters
SN - 2041-8205
IS - 1
M1 - L1
ER -