2021ApJ...922L..13W

Query : 2021ApJ...922L..13W

2021ApJ...922L..13W - Astrophys. J., 922, L13-L13 (2021/November-3)

Unusual emission variations near the eclipse of black widow pulsar PSR J1720-0533.

WANG S.Q., WANG J.B., WANG N., YAO J.M., HOBBS G., DAI S., KOU F.F., MIAO C.C., LI D., FENG Y., DANG S.J., WANG D.H., WANG P., YUAN J.P., ZHANG C.M., ZHANG L., ZHANG S.B. and ZHU W.W.

Abstract (from CDS):

We report on an unusually bright observation of PSR J1720-0533 using the Five-hundred-meter Aperture Spherical radio Telescope (FAST). The pulsar is in a black widow system that was discovered by the Commensal Radio Astronomy FAST Survey (CRAFTS). By coincidence, a bright scintillation maximum was simultaneous with the eclipse in our observation, which allowed for precise measurements of flux density variations, as well as dispersion measure (DM) and polarization. We found that there are quasi-periodic pulse emission variations with a modulation period of ∼22 s during the ingress of the eclipse, which could be caused by plasma lensing. No such periodic modulation was found during the egress of the eclipse. The linear polarization of the pulsar disappears before the eclipse, even before there is a visually obvious change in DM. We also found that the pulse scattering may play an important role in the eclipse of PSR J1720-0533.

Abstract Copyright: © 2021. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Radio pulsars - Millisecond pulsars - Eclipsing binary stars

Simbad objects: 8

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Number of rows : 8
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 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
2 PSR J1720-0533 Psr 17 20.0 -05 33           ~ 15 0
3 PSR B1744-24A Psr 17 48 02.249 -24 46 37.65           ~ 235 0
4 PSR J1810+17 Psr 18 10 37.2791131488 +17 44 37.425884136           ~ 147 1
5 PSR J1816+4510 Psr 18 16 35.9342957160 +45 10 33.917516328           ~ 126 0
6 PSR J1959+2048 Psr 19 59 36.7643141520 +20 48 14.896407996   21.08 20.16 19.53 18.79 G: 854 3
7 V* LY Aqr Psr 20 51 07.52058 -08 27 37.6100           ~ 236 2
8 PSR J2256-1024 Psr 22 56 56.390 -10 24 34.37           ~ 88 0

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