title   
  

The mass and the radius of the neutron star in the transient low mass X-ray binary SAX J1748.9−2021

Güver, Tolga and Özel, Feryal (2012) The mass and the radius of the neutron star in the transient low mass X-ray binary SAX J1748.9−2021. (Accepted/In Press)

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Abstract

We use time resolved spectroscopy of thermonuclear X-ray bursts observed from SAX J1748.9−2021 to infer the mass and the radius of the neutron star in the binary. Four X-ray bursts observed from the source with RXTE enable us to measure the angular size and the Eddington limit on the neutron star surface. Combined with a distance measurement to the globular cluster NGC 6440, in which SAX J1748.9−2021 resides, we obtain two solutions for the neutron star radius and mass, R = 8.18±1.62 km and M = 1.78±0.3 M_sun or R = 10.93±2.09 km and M = 1.33 ± 0.33 M_sun.

Item Type:Article
Uncontrolled Keywords:stars: neutron - X-ray: individual
Subjects:Q Science > QB Astronomy
Q Science > QC Physics
ID Code:21351
Deposited By:Tolga Güver
Deposited On:10 Jan 2013 12:13
Last Modified:19 Nov 2014 16:03

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