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Discovery, Timing, and Multiwavelength Observations of the Black Widow Millisecond Pulsar PSR J1555-2908
Authors
Philippe Bruel
Fernando Camilo
+22 more
Colin J. Clark
H. Thankful Cromartie
Paul Demorest
Julia Deneva
Elizabeth C. Ferrara
Dale A. Frail
Sebastien Guillot
Jules P. Halpern
Huib Intema
Preshanth Jagannathan
Matthew Kerr
Andrew Lyne
P.F. Michelson
Mitch Mickaliger
Kunal P. Mooley
Lars Nieder
Scott M. Ransom
Paul S. Ray
Ben W. Stappers
Kevin Stovall
Samuel J. Swihart
Michael T. Wolff
Publication date
1 January 2022
Publisher
London : Institute of Physics Publ.
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Cite
Abstract
We report the discovery of PSR J1555-2908, a 1.79 ms radio and gamma-ray pulsar in a 5.6 hr binary system with a minimum companion mass of 0.052 M ⊙. This fast and energetic ( Ė=3×1035 erg s-1) millisecond pulsar was first detected as a gamma-ray point source in Fermi Large Area Telescope (LAT) sky survey observations. Guided by a steep-spectrum radio point source in the Fermi error region, we performed a search at 820 MHz with the Green Bank Telescope that first discovered the pulsations. The initial radio pulse timing observations provided enough information to seed a search for gamma-ray pulsations in the LAT data, from which we derive a timing solution valid for the full Fermi mission. In addition to the discovery and timing of radio and gamma-ray pulsations, we searched for X-ray pulsations using NICER but no significant pulsations were detected. We also obtained time-series r-band photometry that indicates strong heating of the companion star by the pulsar wind. Material blown off the heated companion eclipses the 820 MHz radio pulse during inferior conjunction of the companion for ≈10% of the orbit, which is twice the angle subtended by its Roche lobe in an edge-on system. © 2022. The Author(s). Published by the American Astronomical Society
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Institutionelles Repositorium der Leibniz Universität Hannover
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Last time updated on 01/11/2022