An eccentric binary millisecond pulsar in the galactic plane

被引：156

作者：

Champion, David J. ^{[1
,2
]}

Ransom, Scott M. ^{[3
]}

Lazarus, Patrick ^{[1
]}

Camilo, Fernando ^{[4
]}

Bassa, Cees ^{[1
]}

Kaspi, Victoria M. ^{[1
]}

Nice, David J. ^{[5
]}

Freire, Paulo C. C. ^{[6
]}

Stairs, Ingrid H. ^{[7
]}

van Leeuwen, Joeri ^{[8
]}

Stappers, Ben W. ^{[9
]}

Cordes, James M. ^{[10
]}

Hessels, Jason W. T. ^{[11
]}

Lorimer, Duncan R. ^{[12
]}

Arzoumanian, Zaven ^{[13
,14
]}

Backer, Don C. ^{[8
]}

Bhat, N. D. Ramesh ^{[15
]}

Chatterjee, Shami ^{[16
]}

Cognard, Ismael ^{[17
]}

Deneva, Julia S. ^{[10
]}

Faucher-Giguere, Claude-Andre ^{[18
]}

Gaensler, Bryan M. ^{[16
]}

Han, JinLin ^{[19
]}

Jenet, Fredrick A. ^{[20
]}

Kasian, Laura ^{[7
]}

Kondratiev, Vlad I. ^{[12
]}

Kramer, Michael ^{[9
]}

Lazio, Joseph ^{[21
]}

McLaughlin, Maura A. ^{[12
]}

Venkataraman, Arun ^{[6
]}

Vlemmings, Wouter ^{[22
]}

机构：

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

[2] CSIRO, Australia Telescope Natl Facil, Epping, NSW 1710, Australia

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

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

[5] Bryn Mawr Coll, Dept Phys, Bryn Mawr, PA 19010 USA

[6] Natl Astron & Ionosphere Ctr, Arecibo Observ, Arecibo, PR 00612 USA

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

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

[9] Univ Manchester, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, England

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

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

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

[13] NASA, Ctr Res & Explorat Space Sci & Technol, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[14] NASA, Xray Astrophys Lab, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[15] Swinburne Univ Technol, Hawthorn, Vic 3122, Australia

[16] Univ Sydney, Sch Phys, Sydney, NSW 2006, Australia

[17] CNRS, Lab Phys & Chim Environm, UMR 6115, F-45071 Orleans 2, France

[18] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[19] Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China

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

[21] USN, Res Lab, Washington, DC 20375 USA

[22] Univ Bonn, Argelander Inst Astron, D-53121 Bonn, Germany

来源：

SCIENCE | 2008年 / 320卷 / 5881期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1126/science.1157580

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Binary pulsar systems are superb probes of stellar and binary evolution and the physics of extreme environments. In a survey with the Arecibo telescope, we have found PSR J1903+ 0327, a radio pulsar with a rotational period of 2.15 milliseconds in a highly eccentric ( e = 0.44) 95- day orbit around a solar mass ( M.) companion. Infrared observations identify a possible main- sequence companion star. Conventional binary stellar evolution models predict neither large orbital eccentricities nor main- sequence companions around millisecond pulsars. Alternative formation scenarios involve recycling a neutron star in a globular cluster, then ejecting it into the Galactic disk, or membership in a hierarchical triple system. A relativistic analysis of timing observations of the pulsar finds its mass to be 1.74 +/- 0.04 M. an unusually high value.

引用

页码：1309 / 1312

页数：4

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