An eccentric binary millisecond pulsar in the galactic plane.
| Title: | An eccentric binary millisecond pulsar in the galactic plane. |
|---|---|
| Authors: | Champion DJ; Department of Physics, McGill University, Montreal, QC H3A 2T8, Canada. David.Champion@atnf.csiro.au; Ransom SM; Lazarus P; Camilo F; Bassa C; Kaspi VM; Nice DJ; Freire PC; Stairs IH; van Leeuwen J; Stappers BW; Cordes JM; Hessels JW; Lorimer DR; Arzoumanian Z; Backer DC; Bhat ND; Chatterjee S; Cognard I; Deneva JS; Faucher-Giguère CA; Gaensler BM; Han J; Jenet FA; Kasian L; Kondratiev VI; Kramer M; Lazio J; McLaughlin MA; Venkataraman A; Vlemmings W |
| Source: | Science (New York, N.Y.) [Science] 2008 Jun 06; Vol. 320 (5881), pp. 1309-12. Date of Electronic Publication: 2008 May 15. |
| Publication Type: | Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. |
| Language: | English |
| Journal Info: | Publisher: American Association for the Advancement of Science Country of Publication: United States NLM ID: 0404511 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1095-9203 (Electronic) Linking ISSN: 00368075 NLM ISO Abbreviation: Science Subsets: PubMed not MEDLINE |
| Imprint Name(s): | Publication: : Washington, DC : American Association for the Advancement of Science; Original Publication: New York, N.Y. : [s.n.] 1880- |
| Abstract: | 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(middle dot in circle)) 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 solar symbol, an unusually high value. |
| Comments: | Comment in: Science. 2008 Jun 6;320(5881):1298-9. doi: 10.1126/science.1158738.. (PMID: 18483400) |
| Entry Date(s): | Date Created: 20080517 Date Completed: 20080624 Latest Revision: 20090714 |
| Update Code: | 20260130 |
| DOI: | 10.1126/science.1157580 |
| PMID: | 18483399 |
| Database: | MEDLINE |
Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.