The Distance and Radius of the Neutron Star PSR B0656+14 | Zendy

Walter Brisken | Zendy; S. E. Thorsett | Zendy; Aaron Golden | Zendy; W. M. Goss | Zendy

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The Distance and Radius of the Neutron Star PSR B0656+14

Author(s) -

Walter Brisken,

S. E. Thorsett,

Aaron Golden,

W. M. Goss

Publication year - 2003

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/378184

Subject(s) - physics , pulsar , neutron star , radius , astrophysics , astronomy , black body radiation , photosphere , millisecond pulsar , parallax , x ray pulsar , star (game theory) , radiation , nuclear physics , spectral line , computer security , computer science

We present the result of astrometric observations of the radio pulsar PSRB0656+14, made using the Very Long Baseline Array. The parallax of the pulsaris pi = 3.47 +- 0.36 mas, yielding a distance of 288 +33 -27 pc. Thisindependent distance estimate has been used to constrain existing models ofthermal x-ray emission from the neutron star's photosphere. Simple blackbodyfits to the x-ray data formally yield a neutron star radius R_inf ~ 7-8.5 km.With more realistic fits to a magnetized hydrogen atmosphere, any radiusbetween ~13 and ~20 km is allowed.Comment: 7 pages including 1 figure. Submitted to ApJL. AASte

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