Mass and radius estimation for the neutron star in the X-ray burster 4U 1820-30

作者：Kusmierek K^*; Madej J; Kuulkers E

来源：Monthly Notices of the Royal Astronomical Society, 2011, 415(4): 3344-3348.

DOI：10.1111/j.1365-2966.2011.18948.x

• stars: individual: 4U 1820-30
• stars: neutron
• X-rays: bursts

We present a new method for determining masses and radii of neutron stars residing in thermonuclear X-ray burst sources. To illustrate this method, we apply it to a burst from the source 4U 1820-30 recorded by the Rossi X-Ray Timing Explorer. Fits of the observed X-ray spectra to grids of Comptonized model atmospheres yield estimates for the mass and radius of the neutron star, M = 1.3 +/- 0.6 M-circle dot and R = 11(-2)(+3) km, respectively.

• 出版日期2011-8