ARECIBO PALFA SURVEY AND EINSTEIN@HOME: BINARY PULSAR DISCOVERY BY VOLUNTEER COMPUTING

被引：22

作者：

Knispel, B. ^{[1
,2
]}

Lazarus, P. ^{[3
]}

Allen, B. ^{[1
,2
,4
]}

Anderson, D. ^{[5
]}

Aulbert, C. ^{[1
,2
]}

Bhat, N. D. R. ^{[6
]}

Bock, O. ^{[1
,2
]}

Bogdanov, S. ^{[3
]}

Brazier, A. ^{[7
,8
]}

Camilo, F. ^{[9
]}

Chatterjee, S. ^{[7
]}

Cordes, J. M. ^{[7
]}

Crawford, F. ^{[10
]}

Deneva, J. S. ^{[11
]}

Desvignes, G. ^{[12
,13
]}

Fehrmann, H. ^{[1
,2
]}

Freire, P. C. C. ^{[14
]}

Hammer, D. ^{[4
]}

Hessels, J. W. T. ^{[15
,16
]}

Jenet, F. A. ^{[17
]}

Kaspi, V. M. ^{[3
]}

Kramer, M. ^{[14
,18
]}

van Leeuwen, J. ^{[15
,16
]}

Lorimer, D. R. ^{[19
,25
]}

Lyne, A. G. ^{[18
]}

Machenschalk, B. ^{[1
,2
]}

McLaughlin, M. A. ^{[19
,25
]}

Messenger, C. ^{[1
,2
,20
]}

Nice, D. J. ^{[21
]}

Papa, M. A. ^{[4
,22
]}

Pletsch, H. J. ^{[1
,2
]}

Prix, R. ^{[1
,2
]}

Ransom, S. M. ^{[23
]}

Siemens, X. ^{[4
]}

Stairs, I. H. ^{[24
]}

Stappers, B. W. ^{[18
]}

Stovall, K. ^{[17
]}

Venkataraman, A. ^{[11
]}

机构：

[1] Max Planck Inst Gravitat Phys, Albert Einstein Inst, D-30167 Hannover, Germany

[2] Leibniz Univ Hannover, Inst Gravitat Phys, D-30167 Hannover, Germany

[3] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada

[4] Univ Wisconsin, Dept Phys, Milwaukee, WI 53211 USA

[5] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA

[6] Swinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, Australia

[7] Cornell Univ, Dept Astron, Ithaca, NY 14853 USA

[8] Cornell Univ, NAIC, Ithaca, NY 14853 USA

[9] Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA

[10] Franklin & Marshall Coll, Dept Phys & Astron, Lancaster, PA 17604 USA

[11] Arecibo Observ, Arecibo, PR 00612 USA

[12] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA

[13] Univ Calif Berkeley, Radio Astron Lab, Berkeley, CA 94720 USA

[14] Max Planck Inst Radioastron, D-53121 Bonn, Germany

[15] Netherlands Inst Radio Astron ASTRON, NL-7990 AA Dwingeloo, Netherlands

[16] Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands

[17] Univ Texas Brownsville, Ctr Gravitat Wave Astron, Brownsville, TX 78520 USA

[18] Univ Manchester, Sch Phys & Astron, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, Lancs, England

[19] W Virginia Univ, Dept Phys, Morgantown, WV 26506 USA

[20] Cardiff Univ, Cardiff Sch Phys & Astron, Cardiff CF24 3AA, S Glam, Wales

[21] Lafayette Coll, Dept Phys, Easton, PA 18042 USA

[22] Max Planck Inst Gravitat Phys, Albert Einstein Inst, D-14476 Golm, Germany

[23] Natl Radio Astron Observ, Charlottesville, VA 22903 USA

[24] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada

[25] Natl Radio Astron Observ, Green Bank, WV 24944 USA

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2011年 / 732卷 / 01期

基金：

美国国家科学基金会; 加拿大自然科学与工程研究理事会;

关键词：

pulsars: general; pulsars: individual (J1952+2630); stars: neutron; white dwarfs; GENERAL-RELATIVITY; SHAPIRO DELAY; SYSTEMS; TESTS;

D O I：

10.1088/2041-8205/732/1/L1

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the discovery of the 20.7 ms 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 9.4 hr, a projected orbital radius of 2.8 lt-s, and a mass function of f = 0.15M(circle dot) by analysis of spin period measurements. No evidence of orbital eccentricity is apparent; we set a 2 sigma upper limit e less than or similar to 1.7 x 10(-3). The orbital parameters suggest a massive white dwarf companion with a minimum mass of 0.95 M-circle dot, assuming a pulsar mass of 1.4 M-circle dot. 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.

引用

页数：5

共 22 条

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