Two New Black Widow Millisecond Pulsars in M28

被引：12

作者：

Douglas, Andrew ^{[1
]}

Padmanabh, Prajwal, V ^{[2
]}

Ransom, Scott M. ^{[3
]}

Ridolfi, Alessandro ^{[2
,4
]}

Freire, Paulo ^{[2
]}

Krishnan, Vivek Venkatraman ^{[2
]}

Barr, Ewan D. ^{[2
]}

Pallanca, Cristina ^{[5
,6
]}

Cadelano, Mario ^{[5
,6
]}

Possenti, Andrea ^{[4
]}

Stairs, Ingrid ^{[7
]}

Hessels, Jason W. T. ^{[8
,9
]}

DeCesar, Megan E. ^{[10
,14
]}

Lynch, Ryan S. ^{[11
]}

Bailes, Matthew ^{[12
]}

Burgay, Marta ^{[4
]}

Champion, David J. ^{[2
]}

Karuppusamy, Ramesh ^{[2
]}

Kramer, Michael ^{[2
]}

Stappers, Benjamin ^{[13
]}

Vleeschower, Laila ^{[13
]}

机构：

[1] Univ Virginia, 1826 Univ Ave, Charlottesville, VA 22904 USA

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

[3] NRAO, 520 Edgemont Rd, Charlottesville, VA 22903 USA

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

[5] Univ Bologna, Dipartimento Fis & Astron Augusto Righi, Via Gobetti 93-2, I-40129 Bologna, Italy

[6] INAF, Osservatorio Astrofis & Sci Spazio Bologna, Via Gobetti 93-3, I-40129 Bologna, Italy

[7] Univ British Columbia, Dept Phys & Astron, 6224 Agr Rd, Vancouver, BC V6T 1Z1, Canada

[8] Netherlands Inst Radio Astron, ASTRON, Oude Hoogeveensedijk 4, NL-7991 PD Dwingeloo, Netherlands

[9] Univ Amsterdam, Anton Pannekoek Inst Astron, Postbus 94249, NL-1090 GE Amsterdam, Netherlands

[10] George Mason Univ, Fairfax, VA 22030 USA

[11] Green Bank Observ, POB 2, Green Bank, WV 24944 USA

[12] Swinburne Univ Technol, Ctr Astrophys & Supercomp OzGrav, Mail 74,POB 218, Hawthorn, Vic 3122, Australia

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

[14] US Naval Res Lab, Washington, DC 20375 USA

来源：

ASTROPHYSICAL JOURNAL | 2022年 / 927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：

47; TUCANAE; RADIO PULSARS; GAIA EDR3; CHANDRA; DISCOVERY; ROTATION;

D O I：

10.3847/1538-4357/ac4744

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the discovery of two Black Widow millisecond pulsars in the globular cluster (GC) M28 with the MeerKAT telescope. PSR J1824-2452M (M28M) is a 4.78 ms pulsar in a 5.82 hr orbit, and PSR J1824-2452N (M28N) is a 3.35 ms pulsar in a 4.76 hr orbit. Both pulsars have dispersion measures near 119.30 pc cm(-3) and have low-mass companion stars (similar to 0.01-0.03 M (circle dot)) that do not cause strong radio eclipses or orbital variations. Including these systems, there are now five known black widow pulsars in M28. The pulsar searches were conducted as a part of an initial phase of MeerKAT's GC census (within the TRAPUM Large Survey Project). These faint discoveries demonstrate the advantages of MeerKAT's survey sensitivity over previous searches, and we expect to find additional pulsars in continued searches of this cluster.

引用

页数：8

共 40 条

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ASTROPHYSICAL JOURNAL, 2022, 941 (02)
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