2020ApJ...902L..46N


Query : 2020ApJ...902L..46N

2020ApJ...902L..46N - Astrophys. J., 902, L46-L46 (2020/October-3)

Discovery of a gamma-ray black widow pulsar by GPU-accelerated

NIEDER L., CLARK C.J., KANDEL D., ROMANI R.W., BASSA C.G., ALLEN B., ASHOK A., COGNARD I., FEHRMANN H., FREIRE P., KARUPPUSAMY R., KRAMER M., LI D., MACHENSCHALK B., PAN Z., PAPA M.A., RANSOM S.M., RAY P.S., ROY J., WANG P., WU J., AULBERT C., BARR E.D., BEHESHTIPOUR B., BEHNKE O., BHATTACHARYYA B., BRETON R.P., CAMILO F., CHOQUET C., DHILLON V.S., FERRARA E.C., GUILLEMOT L., HESSELS J.W.T., KERR M., KWANG S.A., MARSH T.R., MICKALIGER M.B., PLEUNIS Z., PLETSCH H.J., ROBERTS M.S.E., SANPA-ARSA S. and STELTNER B.

Abstract (from CDS):

We report the discovery of 1.97 ms period gamma-ray pulsations from the 75 minute orbital-period binary pulsar now named PSR J1653-0158. The associated Fermi Large Area Telescope gamma-ray source 4FGL J1653.6-0158 has long been expected to harbor a binary millisecond pulsar. Despite the pulsar-like gamma-ray spectrum and candidate optical/X-ray associations-whose periodic brightness modulations suggested an orbit-no radio pulsations had been found in many searches. The pulsar was discovered by directly searching the gamma-ray data using the GPU-accelerated Einstein@Home distributed volunteer computing system. The multidimensional parameter space was bounded by positional and orbital constraints obtained from the optical counterpart. More sensitive analyses of archival and new radio data using knowledge of the pulsar timing solution yield very stringent upper limits on radio emission. Any radio emission is thus either exceptionally weak, or eclipsed for a large fraction of the time. The pulsar has one of the three lowest inferred surface magnetic-field strengths of any known pulsar with Bsurf ≃ 4 x 107 G. The resulting mass function, combined with models of the companion star's optical light curve and spectra, suggests a pulsar mass >=2 M. The companion is lightweight with mass ∼0.01 M, and the orbital period is the shortest known for any rotation-powered binary pulsar. This discovery demonstrates the Fermi Large Area Telescope's potential to discover extreme pulsars that would otherwise remain undetected.

Abstract Copyright: © 2020. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Gamma-ray sources - Millisecond pulsars - Neutron stars - Binary pulsars

VizieR on-line data: <Available at CDS (J/ApJ/902/L46): fig4.dat>

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 PSR J1311-3430 Psr 13 11 47.6 -34 30 35           ~ 135 1
2 PSR J1653-0158 Psr 16 53 38.05381 -01 58 36.8930           ~ 54 0
3 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 13314 0

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2022.11.30-13:06:08

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