IDENTIFICATION OF THE OPTICAL COUNTERPART OF FERMI BLACK WIDOW MILLISECOND PULSAR PSR J1544+4937
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....
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| Veröffentlicht in: | Astrophysical journal. Letters 2014-08, Vol.791 (1), p.1-5 |
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| container_title | Astrophysical journal. Letters |
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| creator | Tang, Sumin Kaplan, David L Phinney, E Sterl Prince, Thomas A Breton, Rene P BELLM, ERIC Bildsten, Lars Cao, Yi Kong, Albert K H Perley, Daniel A SESAR, BRANIMIR Wolf, William M Yen, T-C |
| 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. |
| doi_str_mv | 10.1088/2041-8205/791/1/L5 |
| format | Article |
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| subjects | ASTROPHYSICS, COSMOLOGY AND ASTRONOMY Band spectra Bands DIAGRAMS Emission GAMMA RADIATION Hemispheres Imaging spectrometers IRRADIATION Mathematical models Millisecond pulsars PULSARS RESOLUTION SPECTROMETERS STAR MODELS SURFACES VARIATIONS VISIBLE RADIATION WHITE DWARF STARS |
| title | IDENTIFICATION OF THE OPTICAL COUNTERPART OF FERMI BLACK WIDOW MILLISECOND PULSAR PSR J1544+4937 |
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