2021MNRAS.508.2823C

Query : 2021MNRAS.508.2823C

2021MNRAS.508.2823C - Mon. Not. R. Astron. Soc., 508, 2823-2847 (2021/December-1)

A deep search for faint Chandra X-ray sources, radio sources, and optical counterparts in NGC 6752.

COHN H.N., LUGGER P.M., ZHAO Y., TUDOR V., HEINKE C.O., COOL A.M., ANDERSON J., STRADER J. and MILLER-JONES J.C.A.

Abstract (from CDS):

We report the results of a deep search for faint Chandra X-ray sources, radio sources, and optical counterparts in the nearby, core-collapsed globular cluster, NGC 6752. We combined new and archival Chandra imaging to detect 51 X-ray sources (12 of which are new) within the 1.9 arcmin half-light radius. Three radio sources in deep ATCA 5 and 9 GHz radio images match with Chandra sources. We have searched for optical identifications for the expanded Chandra source list using deep Hubble Space Telescope photometry in B435, R625, H α, UV275, and U336. Among the entire sample of 51 Chandra sources, we identify 18 cataclysmic variables (CVs), 9 chromospherically active binaries (ABs), 3 red giants (RGs), 3 galaxies (GLXs), and 6 active galactic nuclei (AGNs). Three of the sources are associated with millisecond pulsars (MSPs). As in our previous study of NGC 6752, we find that the brightest CVs appear to be more centrally concentrated than the faintest CVs, although the effect is no longer statistically significant as a consequence of the inclusion in the faint group of two intermediate brightness CVs. This possible difference in the radial distributions of the bright and faint CV groups appears to indicate that mass segregation has separated them. We note that photometric incompleteness in the crowded central region of the cluster may also play a role. Both groups of CVs have an inferred mass above that of the main-sequence turnoff stars. We discuss the implications for the masses of the CV components.

Abstract Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): binaries: close - novae, cataclysmic variables - globular clusters: individual: NGC 6752 - X-rays: binaries

Simbad objects: 58

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Number of rows : 58
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 Cl* NGC 104 SBG V3 CV* 00 24 06.2943986812 -72 04 45.361338815   13.429 10.622   9.316 ~ 34 0
4 NGC 362 GlC 01 03 14.26 -70 50 55.6     6.58     ~ 1167 0
5 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3677 0
6 M 80 GlC 16 17 02.41 -22 58 33.9           ~ 780 0
7 CGKB A CV* 17 40 38.904 -53 39 51.09   24.73   22.72   ~ 9 0
8 NGC 6397 GlC 17 40 42.09 -53 40 27.6     5.17     ~ 2103 0
9 M 70 GlC 18 43 12.76 -32 17 31.6           ~ 421 0
10 [PLH2002] CX26 G 19 10 39.162 -59 59 45.15   25.16   23.00   ~ 2 0
11 [G93] NGC 6752 A AGN 19 10 40.375 -59 58 41.47   21.76   20.97   ~ 11 0
12 [PLH2002] CX13 CV* 19 10 40.610 -60 00 05.91   24.60   24.32   ~ 9 0
13 [PLH2002] CX30 X 19 10 40.675 +00 06 46.80           ~ 1 0
14 [PLH2002] CX28 X 19 10 42.505 +00 08 27.60           ~ 1 0
15 [PLH2002] CX16 BY* 19 10 42.531 -59 58 43.03   19.39   18.33   ~ 5 0
16 [PLH2002] CX34 ** 19 10 45.694 -59 58 20.09   22.04   20.23   ~ 2 0
17 [PLH2002] CX39 G 19 10 46.352 -59 57 49.92   24.86   22.26   ~ 2 0
18 [PLH2002] CX21 CV? 19 10 49.516 -59 59 43.16   19.06   18.53   ~ 5 0
19 [PLH2002] CX36 CV* 19 10 49.585 -59 58 26.41   24.93   24.85   ~ 5 0
20 [PLH2002] CX40 ** 19 10 50.357 -59 59 13.89   21.18   19.72   ~ 2 0
21 [PLH2002] CX37 ** 19 10 50.509 -59 59 08.77   22.35   20.42   ~ 2 0
22 [PLH2002] CX31 X 19 10 50.515 +00 06 43.20           ~ 1 0
23 Cl* NGC 6752 SAW V27 CV* 19 10 51.0764787837 -59 59 12.157923910           ~ 16 0
24 [PLH2002] CX5 CV* 19 10 51.414 -59 59 05.18   19.65   18.57   ~ 11 0
25 [JVH94] NGC 6752 22 CV* 19 10 51.505 -59 59 27.10   24.07   23.87   ~ 10 0
26 Cl* NGC 6752 BRS 2 CV* 19 10 51.511 -59 58 56.85           ~ 18 0
27 Cl* NGC 6752 SAW V25 CV* 19 10 51.586 -59 59 01.73   21.09   20.10   ~ 18 0
28 [PLH2002] CX9 CV? 19 10 51.766 -59 58 59.25   24.40   22.42   ~ 8 0
29 [PLH2002] CX25 CV? 19 10 51.957 -59 58 40.55   25.73   25.51   ~ 5 0
30 [PLH2002] CX18 X 19 10 52.006 -59 59 03.69           ~ 6 0
31 [PLH2002] CX14 X 19 10 52.039 -59 59 09.12           ~ 6 0
32 PSR J1910-5959B Psr 19 10 52.0556 -59 59 00.861           ~ 20 0
33 [PLH2002] CX27 ** 19 10 52.059 -59 59 00.84   21.65   20.13   ~ 2 0
34 PSR J1910-5959F Psr 19 10 52.066 -59 59 09.30           ~ 6 0
35 NGC 6752 GlC 19 10 52.11 -59 59 04.4           ~ 2121 0
36 PSR J1910-5959E Psr 19 10 52.1572 -59 59 02.087           ~ 19 0
37 [PLH2002] CX35 CV? 19 10 52.165 -59 59 16.73   24.89   24.11   ~ 5 0
38 [PLH2002] CX29 CV? 19 10 52.293 -59 59 01.79   22.49   20.83   ~ 3 0
39 [PLH2002] CX11 CV* 19 10 52.376 -59 59 05.56           ~ 8 0
40 [PLH2002] CX23 CV? 19 10 52.546 -59 59 04.38   20.68   19.58   ~ 5 0
41 [PLH2002] CX24 CV? 19 10 52.670 -59 59 03.21   22.97   22.66   ~ 5 0
42 [PLH2002] CX12 X 19 10 52.694 -59 59 03.27           ~ 6 0
43 [PLH2002] CX20 ** 19 10 52.848 -59 59 02.54   21.99   20.20   ~ 2 0
44 [PLH2002] CX32 CV? 19 10 54.137 -59 59 11.04   22.12   20.54   ~ 5 0
45 [PLH2002] CX10 AGN 19 10 54.754 -59 59 13.86   20.16   19.70   ~ 7 0
46 [PLH2002] CX19 ** 19 10 55.600 -59 59 17.33   18.35   17.58   ~ 8 0
47 [PLH2002] CX15 AGN 19 10 55.847 -59 57 45.78   23.05   22.66   ~ 7 0
48 [G93] NGC 6752 D CV* 19 10 56.005 -59 59 37.33           ~ 12 0
49 [PLH2002] CX38 ** 19 11 02.151 -59 58 11.81   20.34   19.15   ~ 2 0
50 [PLH2002] CX8 CV? 19 11 02.944 -59 59 41.89           ~ 6 0
51 [PLH2002] CX22 X 19 11 02.945 +00 05 42.00           ~ 1 0
52 [PLH2002] CX33 X 19 11 03.285 +00 08 27.60           ~ 1 0
53 [PLH2002] CX17 G 19 11 05.258 -59 59 04.42           ~ 6 0
54 PSR B1907-60C Psr 19 11 05.5561 -60 00 59.680           ~ 33 0
55 PSR J1910-5959A Psr 19 11 42.7562 -59 58 26.900 22.02 22.13 22.03     DA5 99 1
56 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3274 0
57 PSR J2129+1209C Psr 21 30 01.2030 +12 10 38.159           ~ 215 2
58 M 30 GlC 21 40 22.12 -23 10 47.5     7.10     ~ 1121 0

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