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| Query : 2013ApJ...765L...1G |
2013ApJ...765L...1G - Astrophys. J., 765, L1 (2013/March-1)
The mass and the radius of the neutron star in the transient low-mass X-ray binary SAX J1748.9-2021.
GUVER T. and OZEL F.
Abstract (from CDS):
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 the Rossi X-ray Timing Explorer 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☉ or R = 10.93±2.09 km and M = 1.33±0.33 M ☉.
Abstract Copyright: ∼
Journal keyword(s): stars: neutron - X-rays: binaries - X-rays: individual: SAX J1748-2021
Simbad objects: 14
| Number of rows : 14 |
| N | Identifier | Otype |
ICRS (J2000) RA |
ICRS (J2000) DEC |
Mag U | Mag B | Mag V | Mag R | Mag I | Sp type |
#ref
1850 - 2026 |
#notes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | NGC 104 | GlC | 00 24 05.359 | -72 04 53.20 | 4.09 | ~ | 4158 | 0 | ||||
| 2 | NGC 2808 | GlC | 09 12 03.10 | -64 51 48.6 | ~ | 1540 | 0 | |||||
| 3 | NGC 5139 | GlC | 13 26 47.28 | -47 28 46.1 | ~ | 3677 | 0 | |||||
| 4 | V* V822 Cen | LXB | 14 58 21.9347842080 | -31 40 07.515432768 | 11.95 | 12.85 | 12.8 | K3-K7V | 555 | 0 | ||
| 5 | V* QX Nor | LXB | 16 12 43.0 | -52 25 26 | ~ | 946 | 1 | |||||
| 6 | M 13 | GlC | 16 41 41.634 | +36 27 40.75 | 5.8 | ~ | 2291 | 0 | ||||
| 7 | KS 1731-260 | LXB | 17 34 13.46 | -26 05 18.6 | 22.8 | 20.9 | ~ | 437 | 0 | |||
| 8 | CGKB B | LXB | 17 40 41.468 | -53 40 04.43 | ~ | 25 | 0 | |||||
| 9 | NGC 6397 | GlC | 17 40 42.09 | -53 40 27.6 | 5.17 | ~ | 2103 | 0 | ||||
| 10 | NAME TER 5 X-1 | LXB | 17 48 05.225 | -24 46 47.66 | ~ | 229 | 1 | |||||
| 11 | [PLV2002] CX1 | LXB | 17 48 52.163 | -20 21 32.40 | ~ | 213 | 1 | |||||
| 12 | NGC 6440 | GlC | 17 48 52.67 | -20 21 34.5 | ~ | 592 | 0 | |||||
| 13 | X Sgr X-4 | LXB | 18 23 40.57 | -30 21 40.6 | 19.06 | 18.81 | ~ | 1056 | 1 | |||
| 14 | V* V4634 Sgr | LXB | 18 29 28.8 | -23 47 48 | 18.90 | 19.40 | 19 | ~ | 399 | 0 |
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