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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 709739.0, MPI für Astronomie / Publikationen_mpia
Identification of the optical counterpart of Fermi black widow millisecond pulsar PSR J1544+4937
Authors:Tang, S.; Kaplan, D. L.; Phinney, E. S.; Prince, T. A.; Breton, R. P.; Bellm, E.; Bildsten, L.; Cao, Y.; Kong, A. K. H.; Perley, D. A.; Sesar, B.; Wolf, W. M.; Yen, T. -. C.
Date of Publication (YYYY-MM-DD):2014
Title of Journal:The Astrophysical Journal Letters
Volume:791
Start Page:id. L5 (5 pp)
Audience:Not Specified
Abstract / Description: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.
Free Keywords:binaries: general; gamma rays: stars; pulsars: individual: PSR J1544+4937; white dwarfs
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:ISSN:0004-637X %R 10.1088/2041-8205/791/1/L5
URL:http://cdsads.u-strasbg.fr/abs/2014ApJ...791L...5T
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