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

被引：251

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 38 条

[1] Time-resolved ultraviolet observations of the globular cluster x-ray source in NGC 6624: The shortest known period binary system
Anderson, SF
Margon, B
Deutsch, EW
Downes, RA
Allen, RG
[J]. ASTROPHYSICAL JOURNAL, 1997, 482 (01) : L69 - L72
[2] Arnaud KA, 1996, ASTR SOC P, V101, P17
[3] A REPROCESSING MODEL FOR THE ULTRAVIOLET AND OPTICAL LIGHT FROM 4U-1820-30
ARONS, J
KING, IR
[J]. ASTROPHYSICAL JOURNAL, 1993, 413 (02) : L121 - L124
[4] RXTE studies of long-term X-ray spectral variations in 4U 1820-30
Bloser, PF
Grindlay, JE
Kaaret, P
Zhang, W
Smale, AP
Barret, D
[J]. ASTROPHYSICAL JOURNAL, 2000, 542 (02) : 1000 - 1015
[5] Relativistic iron emission lines in neutron star low-mass X-ray binaries as probes of neutron star radii
Cackett, Edward M.
Miller, Jon M.
Bhattacharyya, Sudip
Grindlay, Jonathan E.
Homan, Jeroen
Van Der Klis, Michiel
Miller, M. Coleman
Strohmayer, Tod E.
Wijnands, Rudy
[J]. ASTROPHYSICAL JOURNAL, 2008, 674 (01) : 415 - 420
[6] RAPIDLY ROTATING NEUTRON-STARS IN GENERAL-RELATIVITY - REALISTIC EQUATIONS OF STATE
COOK, GB
SHAPIRO, SL
TEUKOLSKY, SA
[J]. ASTROPHYSICAL JOURNAL, 1994, 424 (02) : 823 - 845
[7] Models of type I X-ray bursts from 4U 1820-30
Cumming, A
[J]. ASTROPHYSICAL JOURNAL, 2003, 595 (02) : 1077 - 1085
[8] THERMONUCLEAR (TYPE I) X-RAY BURSTS OBSERVED BY THE ROSSI X-RAY TIMING EXPLORER
Galloway, Duncan K.
Muno, Michael P.
Hartman, Jacob M.
Psaltis, Dimitrios
Chakrabarty, Deepto
[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2008, 179 (02) : 360 - 422
[9] DISCOVERY OF INTENSE X-RAY BURSTS FROM GLOBULAR CLUSTER NGC 6624
GRINDLAY, J
GURSKY, H
SCHNOPPER, H
PARSIGNAULT, DR
HEISE, J
BRINKMAN, AC
SCHRIJVER, J
[J]. ASTROPHYSICAL JOURNAL, 1976, 205 (03) : L127 - L130
[10] The relation between optical extinction and hydrogen column density in the Galaxy
Guever, Tolga
Oezel, Feryal
[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2009, 400 (04) : 2050 - 2053

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