2022ApJ...927..126D

Query : 2022ApJ...927..126D

2022ApJ...927..126D - Astrophys. J., 927, 126-126 (2022/March-1)

Two New Black Widow Millisecond Pulsars in M28.

DOUGLAS A., PADMANABH P.V., RANSOM S.M., RIDOLFI A., FREIRE P., VENKATRAMAN KRISHNAN V., BARR E.D., PALLANCA C., CADELANO M., POSSENTI A., STAIRS I., HESSELS J.W.T., DECESAR M.E., LYNCH R.S., BAILES M., BURGAY M., CHAMPION D.J., KARUPPUSAMY R., KRAMER M., STAPPERS B. and VLEESCHOWER L.

Abstract (from CDS):

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 (∼0.01-0.03 M ☉) 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.

Abstract Copyright: © 2022. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Millisecond pulsars - Radio pulsars - Radio astronomy - Globular star clusters

Simbad objects: 18

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Number of rows : 18
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
2 NGC 1851 GlC 05 14 06.76 -40 02 47.6           ~ 1529 0
3 PSR J1518+0204C Psr 15 18 32.8 +02 04 48           ~ 30 0
4 Cl Terzan 5 Cl* 17 48 05.00 -24 46 48.0           ~ 948 1
5 PSR J1824-2452A Psr 18 24 32.009 -24 52 11.10           ~ 529 2
6 IGR J18245-2452 LXB 18 24 32.50 -24 52 07.8           ~ 253 0
7 PSR J1824-2452J Psr 18 24 32.8 -24 52 11           ~ 16 0
8 PSR J1824-2452F Psr 18 24 32.8 -24 52 11           ~ 15 0
9 PSR J1824-2452C Psr 18 24 32.8 -24 52 11           ~ 23 1
10 PSR J1824-2452H Psr 18 24 32.8 -24 52 11           ~ 29 0
11 PSR J1824-2452K Psr 18 24 32.810 -24 52 11.20           ~ 5 0
12 PSR J1824-2452D Psr 18 24 32.810 -24 52 11.20           ~ 8 0
13 M 28 GlC 18 24 32.89 -24 52 11.4           ~ 821 0
14 2CXO J182433.0-245210 X 18 24 33.070 -24 52 10.45           ~ 4 0
15 PSR J1824-2452N Psr 18 24 33.1418 -24 52 11.890           ~ 5 0
16 PSR J1824-2452M Psr 18 24 33.1835 -24 52 08.200           ~ 6 0
17 2CXO J182433.2-245209 X 18 24 33.2 -24 52 09           ~ 1 0
18 PSR J1953+1846A Psr 19 53 46.44 +18 47 04.7         19.96 ~ 32 0

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