PSR J1301+0833: a kinematic study of a black-widow pulsar

Journal Article · Tue Dec 20 04:00:00 EST 2016 · Astrophysical Journal

DOI:https://doi.org/10.3847/1538-4357/833/2/138· OSTI ID:22868328

Romani, Roger W. ^[1]; Graham, Melissa L. ^[2]; Filippenko, Alexei V.; Zheng, WeiKang ^[3]

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1. Department of Physics, Stanford University, Stanford, CA 94305-4060 (United States)
2. Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195-1580 (United States)
3. Department of Astronomy, University of California, Berkeley, CA 94720-3411 (United States)

We have obtained spectroscopic measurements of the P {sub s} = 1.8 ms, P {sub B} = 6.5 hr black-widow (BW) pulsar PSR J1301+0833 as part of a program to investigate optical companions of wind-shrouded pulsars. The derived radial-velocity amplitude (259±4 km s{sup −1}) and inclination (i≈52{sup ∘}) imply a neutron star mass M{sub p}=1.74{sub −0.17}{sup +0.20} M{sub ⊙}, smaller (for similar fit assumptions) than that of the well-studied original BW pulsar PSR J1959+2048, which shares similar values of P {sub s} and P {sub B}. This fit, which assumes d≈1 kpc, indicates a small heated region on the (anomalously faint) companion. With a free distance and full surface heating the best fit is statistically acceptable, but the large inferred d=4.7±0.3 kpc is inconsistent with the observed pulsar proper motion. Improved photometry and heating models will be needed to refine these measurements.

• OSTI ID: 22868328
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 2 Vol. 833; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
DISTANCE
GAMMA RADIATION
HEATING
INCLINATION
MASS
NEUTRON STARS
PHOTOMETRY
PROPER MOTION
PULSARS
RADIAL VELOCITY
SURFACES