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Identification of the optical counterpart of fermi black widow millisecond pulsar PSR J1544+4937

Tang, S, Kaplan, DL, Phinney, ES, Prince, TA, Breton, RP, Bellm, E, Bildsten, L, Cao, Y, Kong, AKH, Perley, DA, Sesar, B, Wolf, WM and Yen, TC (2014) Identification of the optical counterpart of fermi black widow millisecond pulsar PSR J1544+4937. The Astrophysical Journal Letters, 791 (1). ISSN 2041-8205

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We report the optical identification of the companion to the Fermi black widow millisecond pulsar PSR J1544+4937. We find a highly variable source on Keck Low Resolution Imaging Spectrometer images at the nominal pulsar position, with 2 mag variations over orbital period in the B, g, R, and I bands. The nearly achromatic light curves are difficult to explain with a simply irradiated hemisphere model, and suggest that the optical emission is dominated by a nearly isothermal hot patch on the surface of the companion facing the pulsar. We roughly constrain the distance to PSR J1544+4937 to be between 2 and 5 kpc. A more reliable distance measurement is needed in order to constrain the composition of the companion. © 2014. The American Astronomical Society. All rights reserved.

Item Type: Article
Uncontrolled Keywords: 0201 Astronomical And Space Sciences
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Q Science > QD Chemistry
Divisions: Astrophysics Research Institute
Publisher: American Astronomical Society
Date Deposited: 23 May 2017 09:36
Last Modified: 17 May 2022 14:43
DOI or ID number: 10.1088/2041-8205/791/1/L5
URI: https://researchonline.ljmu.ac.uk/id/eprint/6494
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