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THE MASS AND RADIUS OF THE NEUTRON STAR IN EXO 1745–248
Open accessAbstract
Bursting X-ray binaries in globular clusters are ideal sources for measuring neutron star masses and radii, and hence, for determining the equation of state of cold, ultradense matter. We use time-resolved spectroscopic data from EXO 1745−248 during thermonuclear bursts that show strong evidence for photospheric radius expansion to measure the Eddington flux and the apparent surface area of the neutron star. We combine this with the recent measurement of the distance to the globular cluster Terzan 5, where this source resides, to measure the neutron star mass and radius. We find tightly constrained pairs of values for the mass and radius, which are centered around M = 1.4 M ☉ and R = 11 km or around M = 1.7 M ☉ and R = 9 km. These values favor nucleonic equations of state with symmetry energy that is relatively low and has a weak dependence on density.
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Cites
Schlegel, D. J., Finkbeiner, D. P., & Davis, M. (1998) · The Astrophysical Journal · doi:10.1086/305772 · Cited by 15,126
Neutron Star Structure and the Equation of State
Lattimer, J. M., & Prakash, M. (2001) · The Astrophysical Journal · doi:10.1086/319702 · Cited by 1,665
Neutron star observations: Prognosis for equation of state constraints
LATTIMER, J., & PRAKASH, M. (2007) · Physics Reports · doi:10.1016/j.physrep.2007.02.003 · Cited by 1,399
Thermonuclear (Type I) X‐Ray Bursts Observed by the Rossi X‐Ray Timing Explorer
Galloway, D. K., Muno, M. P., Hartman, J. M., Psaltis, D., & Chakrabarty, D. (2008) · The Astrophysical Journal Supplement Series · doi:10.1086/592044 · Cited by 745
Self-citationGravitationally redshifted absorption lines in the X-ray burst spectra of a neutron star
Cottam, J., Paerels, F., & Mendez, M. (2002) · Nature · doi:10.1038/nature01159 · Cited by 401
A Revised Parallax and Its Implications for RX J185635−3754
Walter, F. M., & Lattimer, J. M. (2002) · The Astrophysical Journal · doi:10.1086/343850 · Cited by 167
Origlia, L., & Rich, R. M. (2004) · The Astronomical Journal · doi:10.1086/420704 · Cited by 87
Ortolani, S., Barbuy, B., Bica, E., et al. (2007) · Astronomy and Astrophysics · doi:10.1051/0004-6361:20066628 · Cited by 78
Cited by
Hinderer, T., Lackey, B. D., Lang, R. N., & Read, J. S. (2010) · Physical Review D · doi:10.1103/physrevd.81.123016 · Cited by 1,048
The Nuclear Equation of State and Neutron Star Masses
Lattimer, J. M. (2012) · Annual Review of Nuclear and Particle Science · doi:10.1146/annurev-nucl-102711-095018 · Cited by 937
Further stable neutron star models from f(R) gravity
Astashenok, A. V., Capozziello, S., & Odintsov, S. D. (2013) · Journal of Cosmology and Astroparticle Physics · doi:10.1088/1475-7516/2013/12/040 · Cited by 379
Maximal neutron star mass and the resolution of the hyperon puzzle in modified gravity
Astashenok, A. V., Capozziello, S., & Odintsov, S. D. (2014) · Physical Review D · doi:10.1103/physrevd.89.103509 · Cited by 255
Metadata
- Authors
- Özel, F., Güver, T., & Psaltis, D.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2009-03-10
- Volume
- 693
- Issue
- 2
- Pages
- 1775-1779
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2069072846
- Cited by
- 306
- References
- 8
- FWCI
- 8.22
- Type
- journal article
- Language
- en
- Open access
- bronze
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