2025ApJ...988..131D

Query : 2025ApJ...988..131D

2025ApJ...988..131D - Astrophys. J., 988, 131 (2025/July-3)

Radio Continuum Studies of Ultracompact and Short Orbital Period X-Ray Binaries.

DAGE K.C., PANURACH T., OH K., SUDHA M., ARMAS PADILLA M., BAHRAMIAN A., CACKETT E.M., GALVIN T.J., HEINKE C.O., LUDLAM R., MAHIDA A.D., PLOTKIN R.M., RUSSELL T.D., SETT S., SAIKIA P., SHAW A.W. and TETARENKO A.J.

Abstract (from CDS):

We present the radio continuum counterparts to the enigmatic ultracompact X-ray binaries (UCXBs): a black hole or neutron star accreting from a hydrogen-deficient white dwarf donor star with short orbital periods (<80 minutes). For the sample of UCXBs hosted by globular clusters (GCs), we search for whether certain GC properties are more likely to enhance UCXB formation. We determine that GCs that host UCXBs are drawn from a distinct population in terms of cluster concentration, core radius, and half-light radius, but are similar to other well-studied GCs in metallicity and cluster mass. In particular, UCXB-hosting GCs tend to be on average more compact, with a higher concentration than other GCs, with significantly higher encounter rates. We investigate whether a correlation exists between radio luminosity and orbital period, using new and archival observations. We determine that there is not a clear connection between the two observable quantities.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Neutron stars - Black holes - White dwarf stars - Low-mass x-ray binary stars - Galactic radio sources

Simbad objects: 55

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Number of rows : 55
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 RX J0021.8-7221 LXB 00 24 04.263 -72 04 57.97 18.868   19.772   19.316 ~ 78 0
2 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
3 4U 0513-40 LXB 05 14 06.59 -40 02 37.0           ~ 176 1
4 NGC 1851 GlC 05 14 06.76 -40 02 47.6           ~ 1529 0
5 V* V1055 Ori LXB 06 17 07.3565603963 +09 08 13.515857360   18.80 18.5     ~ 594 1
6 GRB 200205A Psr 08 40 40.84 -35 16 24.8           ~ 20 0
7 NGC 2808 GlC 09 12 03.10 -64 51 48.6           ~ 1540 0
8 4U 0919-54 LXB 09 20 26.4818170056 -55 12 24.512806404 20.40 21.30 21.0     ~ 175 0
9 V* BW Ant LXB 09 29 20.19 -31 23 03.2   18.50 18.63     ~ 194 0
10 AX J1538.3-5541 LXB 15 38 14.0 -55 42 19           ~ 15 0
11 V* QU TrA LXB 15 47 53.6 -62 34 11           ~ 168 0
12 V* UW CrB LXB 16 05 45.8746697208 +25 51 45.246497976     19.7     ~ 78 0
13 V* KZ TrA LXB 16 32 16.79 -67 27 39.3 17.40 18.60 18.5     ~ 626 1
14 NGC 6256 GlC 16 59 32.68 -37 07 17.1           ~ 182 0
15 IGR J16597-3704 gam 16 59 32.90230 -37 07 14.2780           ~ 30 0
16 IGR J17062-6143 LXB 17 06 16.2820758768 -61 42 40.593758076           ~ 108 0
17 4U 1705-32 LXB 17 08 55.1 -32 18 49           ~ 66 0
18 RX J1709.5-2639 LXB 17 09 30.5 -26 39 26           ~ 130 0
19 NGC 6293 GlC 17 10 10.42 -26 34 54.2           ~ 309 0
20 [KRL2007b] 228 LXB 17 12 37.0 -37 38 42     12.25     ~ 81 0
21 RX J1718.4-4029 LXB 17 18 24.13 -40 29 30.4           ~ 50 0
22 1H 1715-321 LXB 17 18 47.40 -32 10 40.0           ~ 81 0
23 [KRL2007b] 238 LXB 17 25 25.9 -32 57 13     14.50     ~ 54 0
24 ESO 454-29 GlC 17 27 33.24 -30 48 07.8           ~ 278 0
25 [KRL2007b] 241 LX? 17 28 38.97 -29 21 44.9           ~ 43 0
26 NAME Slow Burster LXB 17 31 58.0 -33 49 58     15.50     ~ 865 1
27 RX J1735.3-3540 LX? 17 35 23.75 -35 40 16.1           ~ 28 0
28 XTE J1737-376 HX? 17 37 59.5 -37 46 20           ~ 58 1
29 1ES 1735-26.9 LXB 17 38 17.6 -26 59 39           ~ 177 0
30 2E 1737.5-2817 LXB 17 40 42.84 -28 18 08.5           ~ 87 0
31 2XMM J174716.1-281047 LXB 17 47 16.17 -28 10 48.2           ~ 56 0
32 AX J1747.4-3000 LXB 17 47 26.0 -30 00 02           ~ 119 0
33 [KRL2007b] 281 LXB 17 48 13.148 -36 07 57.02     20.9     ~ 115 0
34 IGR J17494-3030 LXB 17 48 23.62 -30 29 59.0           ~ 34 0
35 NGC 6440 GlC 17 48 52.67 -20 21 34.5           ~ 592 0
36 [KRL2007b] 291 LXB 17 51 13.49 -30 37 23.4           ~ 262 0
37 [KRL2007b] 294 LXB 17 54 14.60 -27 54 34.3           ~ 38 0
38 SWIFT J1756.9-2508 LXB 17 56 57.35 -25 06 27.8           ~ 118 0
39 1RXS J180408.9-342058 LXB 18 04 08.9 -34 20 58           ~ 75 0
40 [OKM2018] SWIFT J1806.5-2223 LXB 18 06 34 -22 15.1           ~ 58 0
41 [KRL2007b] 304 LXB 18 06 59.8 -29 24 30           ~ 228 0
42 SRGA J181228.0-181235 X 18 12 28.0 -18 12 35           ~ 21 0
43 4U 1812-12 LXB 18 15 06.4 -12 05 48           ~ 124 2
44 NGC 6624 GlC 18 23 40.51 -30 21 39.7           ~ 939 1
45 X Sgr X-4 LXB 18 23 40.57 -30 21 40.6   19.06 18.81     ~ 1056 1
46 Cl* NGC 6652 SAW V11 LXB 18 35 44.551 -32 59 38.38         18.72 ~ 23 0
47 NGC 6652 GlC 18 35 45.63 -32 59 26.6           ~ 474 0
48 NGC 6712 GlC 18 53 04.32 -08 42 21.5           ~ 550 0
49 4U 1850-086 LXB 18 53 04.89 -08 42 19.7 20.40 21.20 21.0     ~ 266 1
50 2MAXI J1900-248 LXB 19 00 08.65 -24 55 13.7     18.09     ~ 226 0
51 V* V1405 Aql LXB 19 18 47.6 -05 14 18 20.90 21.40 21.0     ~ 495 0
52 ICRF J193925.0-634245 Sy2 19 39 25.0245304992 -63 42 45.640373400   18.87 18.37 17.64   ~ 1332 2
53 IGR J19566+0326 LXB 19 56 39.04 +03 26 42.7           ~ 50 0
54 CXOU J212958.1+121002 XB* 21 29 58.06 +12 10 02.6     16.6     ~ 87 1
55 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3274 0

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