Measuring Neutron Star Mass and Radius with Three Mass-Radius Relations

Details Measuring Neutron Star Mass and Radius with Three Mass-Radius Relations Measuring Neutron Star Mass and Radius with Three Mass-Radius Relations

2006-11-21

arxiv.org/abs/astro-ph/0611659v1

Mon.Not.Roy.Astron.Soc.374:232-236,2007

Astronomy and Astrophysics

Astrophysics

8 pages, 3 figures, accepted by MNRAS

Scientific paper

10.1111/j.1365-2966.2006.11133.x

We propose to determine the mass and the radius of a neutron star (NS) using three measurable mass-radius relationships, namely the ``apparent'' radius inferred from neutron star thermal emission, the gravitational redshift inferred from the absorption lines, as well as the averaged stellar mass density inferred from the orbital Keplerian frequency derived from the kilohertz quasi periodic oscillation (kHz QPO) data. We apply the method to constrain the NS mass and the radius of the X-ray sources, 1E 1207.4-5209, Aql X-1 and EXO 0748-676.

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