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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: 19
