Four pulsar discoveries in NGC 6624 by TRAPUM using MeerKAT

被引：23

作者：

Abbate, F. ^{[1
]}

Ridolfi, A. ^{[1
,2
]}

Barr, E. D. ^{[1
]}

Buchner, S. ^{[3
]}

Burgay, M. ^{[2
]}

Champion, D. J. ^{[1
]}

Chen, W. ^{[1
]}

Freire, P. C. C. ^{[1
]}

Gautam, T. ^{[1
]}

Griessmeier, J. M. ^{[4
,5
]}

Kuenkel, L. ^{[6
]}

Kramer, M. ^{[1
,7
]}

Padmanabh, P., V ^{[1
,8
]}

Possenti, A. ^{[2
]}

Ransom, S. ^{[9
]}

Serylak, M. ^{[10
,11
]}

Stappers, B. W. ^{[7
]}

Krishnan, V. Venkatraman ^{[1
]}

Behrend, J. ^{[1
]}

Breton, R. P. ^{[7
]}

Levin, L. ^{[7
]}

Men, Y. ^{[1
]}

机构：

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

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

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

[4] Univ Orleans, CNRS, LPC2E, F-4507 Orleans 2, France

[5] Univ Orleans, PSL Res Univ, CNRS, OSUC,Stn Radioastron Nancay,Observ Paris, F-18330 Nancay, France

[6] Univ Bielefeld, Fak Phys, Postfach 100131, D-33501 Bielefeld, Germany

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

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

[9] Natl Radio Astron Observ, 520 Edgemont Rd, Charlottesville, VA 22903 USA

[10] Jodrell Bank, SKA Observ, Macclesfield SK11 9FT, Cheshire, England

[11] Rhodes Univ, Dept Phys & Elect, POB 94, ZA-6140 Grahamstown, South Africa

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2022年 / 513卷 / 02期

基金：

欧盟地平线“2020”; 欧洲研究理事会;

关键词：

stars: neutron; pulsars: general; globular clusters: individual: NGC 6624; GALACTIC GLOBULAR-CLUSTERS; VELOCITY DISPERSION PROFILES; MILLISECOND PULSARS; RADIO PULSARS; HST;

D O I：

10.1093/mnras/stac1041

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report four new pulsars discovered in the core-collapsed globular cluster (GC) NGC 6624 by the TRAPUM Large Survey Project with the MeerKAT telescope. All of the new pulsars found are isolated. PSR J1823-30211 and PSR J1823-3021K are millisecond pulsars with period of respectively 4.319 and 2.768 ms. PSR J1823-3021J is mildly recycled with a period of 20.899 ms, and PSR J1823-3022 is a long period pulsar with a period of 2.497s. The pulsars J1823-3021I, J1823-3021J, and J1823-3021K have position and dispersion measure (DM) compatible with being members of the GC and are therefore associated with NGC 6624. Pulsar J1823-3022 is the only pulsar bright enough to be re-detected in archival observations of the cluster. This allowed the determination of a timing solution that spans over two decades. It is not possible at the moment to claim the association of pulsar J1823-3022 with the GC given the long period and large offset in position (similar to 3 arcmin) and DM (with a fractional difference of 11 percent compared the average of the pulsars in NGC 6624). The discoveries made use of the beamforming capability of the TRAPUM backend to generate multiple beams in the same field of view which allows sensitive searches to be performed over a few half-light radii from the cluster centre and can simultaneously localize the discoveries. The discoveries reflect the properties expected for pulsars in core-collapsed GCs.

引用

页码：2292 / 2301

页数：10

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