THE MASS AND RADIUS OF THE NEUTRON STAR IN 4U 1820-30

被引：249

作者：

Guver, Tolga ^{[1
]}

Wroblewski, Patricia ^{[1
]}

Camarota, Larry ^{[1
]}

Ozel, Feryal ^{[1
]}

机构：

[1] Univ Arizona, Dept Astron, Tucson, AZ 85721 USA

来源：

ASTROPHYSICAL JOURNAL | 2010年 / 719卷 / 02期

关键词：

stars: neutron; stars: individual (4U 1820-30); X-rays: binaries; X-RAY-BURSTS; QUASI-PERIODIC OSCILLATIONS; GLOBULAR-CLUSTERS; INTERSTELLAR-MEDIUM; NGC; 6624; COMPTONIZED SPECTRA; MODEL ATMOSPHERES; SPECTROSCOPY; 4U-1820-30; ABSORPTION;

D O I：

10.1088/0004-637X/719/2/1807

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report on the measurement of the mass and radius of the neutron star in the low-mass X-ray binary 4U 1820-30. The analysis of the spectroscopic data on multiple thermonuclear bursts yields well-constrained values for the apparent emitting area and the Eddington flux, both of which depend in a distinct way on the mass and radius of the neutron star. The distance to the source is that of the globular cluster NGC 6624, where the source resides. Combining these measurements, we uniquely determine the probability density over the stellar mass and radius. We find the mass to be M = 1.58 +/- 0.06 M(circle dot) and the radius to be R = 9.1 +/- 0.4 km.

引用

页码：1807 / 1812

页数：6

共 50 条

[31] Strong-field gravity and X-ray observations of 4U 1820-30
Kaaret, P
Piraino, S
Bloser, PF
Ford, EC
Grindlay, JE
Santangelo, A
Smale, AP
Zhang, W
ASTROPHYSICAL JOURNAL, 1999, 520 (01): : L37 - L40
[32] The Puzzling Superorbital Period Variation of the Low-mass X-Ray Binary 4U 1820-30
Chou, Yi
Wu, Jun-Lei
Chen, Bo-Chun
Chang, Wei-Yun
ASTROPHYSICAL JOURNAL, 2025, 981 (01):
[33] Binary and long-term (triple?) modulations of 4U 1820-30 in NGC 6624
Chou, Y
Grindlay, JE
ASTROPHYSICAL JOURNAL, 2001, 563 (02): : 934 - 940
[34] On the nature of the flux variability during an expansion stage of a type I X-ray burst: Constraints on neutron star parameters for 4U 1820-30
Shaposhnikov, N
Titarchuk, L
ASTROPHYSICAL JOURNAL, 2004, 606 (01): : L57 - L60
[35] Models of type I X-ray bursts from 4U 1820-30
Cumming, A
ASTROPHYSICAL JOURNAL, 2003, 595 (02): : 1077 - 1085
[36] SPECTRAL STATE EVOLUTION OF 4U 1820-30: THE STABILITY OF THE SPECTRAL INDEX OF THE COMPTONIZATION TAIL
Titarchuk, Lev
Seifina, Elena
Frontera, Filippo
ASTROPHYSICAL JOURNAL, 2013, 767 (02):
[37] An RXTE archival search for coherent X-ray pulsations in LMXB 4U 1820-30
Dib, R
Ransom, S
Ray, P
Kaspi, V
X-RAY TIMING 2003: ROSSI AND BEYOND, 2004, 714 : 232 - 235
[38] On the Dynamics of 4U 1820-30; Resonant Trapping and Tidal Dissipation Rate of the White Dwarf Secondary
Prodan, Snezana
Murray, Norman
EVOLUTION OF COMPACT BINARIES, 2011, 447 : 257 - 262
[39] Radio detections of the neutron star X-ray binaries 4U 1820-30 and Ser X-1 in soft X-ray states
Migliari, S
Fender, RP
Rupen, M
Wachter, S
Jonker, PG
Homan, J
van der Klis, M
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2004, 351 (01) : 186 - 192
[40] GINGA OBSERVATIONS OF 4U 1820-30 IN NGC 6624 - THE 11-MINUTE FLUX MODULATION
SANSOM, AE
WATSON, MG
MAKISHIMA, K
DOTANI, T
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN, 1989, 41 (03) : 591 - 605

← 1 2 3 4 5 →