Timing observations of three Galactic millisecond pulsars

被引：7

作者：

Lorimer, D. R. ^{[1
,2
]}

Kawash, A. M. ^{[3
]}

Freire, P. C. C. ^{[4
]}

Smith, D. A. ^{[5
,6
]}

Kerr, M. ^{[7
]}

McLaughlin, M. A. ^{[1
,2
]}

Mickaliger, M. B. ^{[8
]}

Spiewak, R. ^{[8
]}

Bailes, M. ^{[9
,10
]}

Barr, E. ^{[4
]}

Burgay, M. ^{[11
]}

Cameron, A. D. ^{[9
,10
]}

Camilo, F. ^{[12
]}

Johnston, S. ^{[13
]}

Jankowski, F. ^{[8
]}

Keane, E. F. ^{[14
]}

Keith, M. ^{[8
]}

Kramer, M. ^{[7
]}

Possenti, A. ^{[9
]}

机构：

[1] West Virginia Univ, Dept Phys & Astron, Morgantown, WV 26506 USA

[2] West Virginia Univ, Ctr Gravitat Waves & Cosmol, Chestnut Ridge Bldg, Morgantown, WV 26505 USA

[3] Michigan State Univ, Ctr Data Intens & Time Domain Astron, Dept Phys & Astron, E Lansing, MI 48824 USA

[4] Max Planck Inst Radioastron MPIfR, Hugel 69, D-53121 Bonn, Germany

[5] Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, IN2P3 CNRS, F-33175 Gradignan, France

[6] Univ Bordeaux, Lab Astrophys Bordeaux, B18N,Allee Geoffroy St Hilaire, F-33615 Pessac, France

[7] Naval Res Lab, Space Sci Div, Washington, DC 20375 USA

[8] Univ Manchester, Jodrell Bank Ctr Astrophys, Oxford Rd, Manchester M13 9PL, Lancs, England

[9] Swinburne Univ Technol, Ctr Astrophys & Supercomp, POB 218, Hawthorn, Vic 3122, Australia

[10] Swinburne Univ Technol, ARC Ctr Excellence Gravitat Wave Discovery OzGrav, Mail H29,POB 218, Hawthorn, Vic 3122, Australia

[11] INAF, Osservatorio Astron Cagliari, Via Sci 5, I-09047 Selargius, CA, Italy

[12] South African Radio Astron Observ SARAO, 2 Fir St,Black River Pk, ZA-7925 Cape Town, South Africa

[13] CSIRO Astron & Space Sci, Australia Telescope Natl Facil, POB 76, Epping, NSW 1710, Australia

[14] Natl Univ Ireland Galway, Ctr Astron, Sch Phys, Univ Rd, Galway H91 TK33, Ireland

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2021年 / 507卷 / 04期

关键词：

pulsars: individual (PSR J0921-5202; PSR J1146-6610; PSR J1546-5925); stars: neutron; DISCOVERY; BINARY; EVOLUTION; SEARCHES; SYSTEMS;

D O I：

10.1093/mnras/stab2474

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report observed and derived timing parameters for three millisecond pulsars (MSPs) from observations collected with the Parkes 64-m telescope, Murriyang. The pulsars were found during reprocessing of archival survey data by Mickaliger et al. One of the new pulsars (PSR J1546-5925) has a spin period P = 7.8ms and is isolated. The other two (PSR J0921-5202 with P = 9.7ms and PSR J1146-6610 with P = 3.7ms) are in binary systems around low-mass (>0.2 M-circle dot) companions. Their respective orbital periods are 38.2 and 62.8d. While PSR J0921-5202 has a low orbital eccentricity e = 1.3 x 10(-5), in keeping with many other Galactic MSPs, PSR J1146-6610 has a significantly larger eccentricity, e = 7.4 x 10(-3). This makes it a likely member of a group of eccentric MSP-helium white dwarf binary systems in the Galactic disc whose formation is poorly understood. Two of the pulsars are co-located with previously unidentified point sources discovered with the Fermi satellite's Large Area Telescope, but no gamma-ray pulsations have been detected, likely due to their low spin-down powers. We also show that, particularly in terms of orbital diversity, the current sample of MSPs is far from complete and is subject to a number of selection biases.

引用

页码：5303 / 5309

页数：7

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