IDENTIFICATION OF THE OPTICAL COUNTERPART OF FERMI BLACK WIDOW MILLISECOND PULSAR PSR J1544+4937

被引：20

作者：

Tang, Sumin ^{[1
,2
]}

Kaplan, David L. ^{[3
]}

Phinney, E. Sterl ^{[1
]}

Prince, Thomas A. ^{[1
]}

Breton, Rene P. ^{[4
]}

Bellm, Eric ^{[1
]}

Bildsten, Lars ^{[2
,5
]}

Cao, Yi ^{[1
]}

Kong, Albert K. H. ^{[6
,7
]}

Perley, Daniel A. ^{[1
]}

Sesar, Branimir ^{[8
]}

Wolf, William M. ^{[5
]}

Yen, T. -C. ^{[6
,7
]}

机构：

[1] CALTECH, Div Phys Math & Astron, Pasadena, CA 91125 USA

[2] Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA

[3] Univ Wisconsin, Dept Phys, Milwaukee, WI 53211 USA

[4] Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England

[5] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

[6] Natl Tsing Hua Univ, Inst Astron, Hsinchu 30013, Taiwan

[7] Natl Tsing Hua Univ, Dept Phys, Hsinchu 30013, Taiwan

[8] Max Planck Inst Astron, D-69117 Heidelberg, Germany

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2014年 / 791卷 / 01期

基金：

美国国家科学基金会;

关键词：

binaries: general; gamma rays: stars; pulsars: individual (PSR J1544+4937); white dwarfs; STELLAR ASTROPHYSICS MESA; LOW-MASS STARS; BROWN DWARFS; COMPANION; ATMOSPHERES; J1311-3430; TELESCOPE; DISCOVERY; BINARIES; PLANETS;

D O I：

10.1088/2041-8205/791/1/L5

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页数：5

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