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CONSTRAINTS ON THE MASS AND RADIUS OF THE ACCRETING NEUTRON STAR IN THE RAPID BURSTER.
- Source :
-
Astrophysical Journal . 6/20/2012, Vol. 752 Issue 2, p1-1. 1p. - Publication Year :
- 2012
-
Abstract
- The Rapid Burster (MXB 1730-335) is a unique object, showing both type I and type II X-ray bursts. A type I burst of the Rapid Burster was observed with Swift/X-Ray Telescope on 2009 March 5, showing photospheric radius expansion (PRE) for the first time in this source. We report here on the mass and radius determination from this PRE burst using a Bayesian approach. After marginalization over the likely distance of the system (5.8-10 kpc), we obtain M = 1.1 ± 0.3 M☼ and R = 9.6 ± 1.5 km (1σ uncertainties) for the compact object, ruling out the stiffest equations of state for the neutron star. We study the sensitivity of the results to the distance, the color correction factor, and the hydrogen mass fraction in the envelope. We find that only the distance plays a crucial role. [ABSTRACT FROM AUTHOR]
- Subjects :
- *X-ray bursts
*SPACE telescopes
*GAMMA ray bursts
*NEUTRON stars
*BINARY stars
Subjects
Details
- Language :
- English
- ISSN :
- 0004637X
- Volume :
- 752
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Astrophysical Journal
- Publication Type :
- Academic Journal
- Accession number :
- 97997867
- Full Text :
- https://doi.org/10.1088/0004-637X/752/2/158