2022A&A...661A..35S

Query : 2022A&A...661A..35S

2022A&A...661A..35S - Astronomy and Astrophysics, volume 661A35-35 (2022/5-1)

eROSITA study of the globular cluster 47 Tucanae.

SAEEDI S., LIU T., KNIES J., SASAKI M., BECKER W., BULBUL E., DENNERL K., FREYBERG M., LAKTIONOV R. and MERLONI A.

Abstract (from CDS):


Aims. We present the results of the analysis of five observations of the globular clutser 47 Tucanae (47 Tuc) with the extended Roentgen Survey with an Imaging Telescope Array (eROSITA) on board the Spektrum-Roentgen-Gamma (Spektr-RG, SRG). We study the X-ray population in the field of one of the most massive globular clusters in our Milky Way. We focused on the classification of point-like sources in the field of 47 Tuc. The unresolved dense core of 47 Tuc (1.7 radius) and also sources that show extended emission are excluded from this study.
Methods. We applied different methods of X-ray spectral and timing analysis together with multi-wavelength studies to classify the X-rays sources in the field of 47 Tuc.
Results. We detected 888 point-like sources in the energy range of 0.2-5.0 keV. We identified 126 background active galactic nuclei and 25 foreground stars. One of the foreground stars is classified as a variable M dwarf. We also classified 14 X-ray sources as members of 47 Tuc, including one symbiotic star, two quiescent low-mass X-ray binaries, and four cataclysmic variables. There are also five X-ray sources that can either be a cataclysmic variable or a contact binary, and also one X-ray source can be an active binary (type RS CVn). We identified one X-ray binary that belongs to the Small Magellanic Cloud. Moreover, we calculated the X-ray luminosity function of 47 Tuc. No significant population that seems to belong to the globular cluster is observed in the energy range of 0.5-2.0 keV using eROSITA observations.

Abstract Copyright: © ESO 2022

Journal keyword(s): globular clusters: general - X-rays: binaries - binaries: symbiotic - novae, cataclysmic variables

VizieR on-line data: <Available at CDS (J/A+A/661/A35): tableb1.dat tableb2.dat tableb3.dat>

CDS comments: The identifiers are truncated in order to meet the IAU requirements for acronym SRGE (SRGE JHHMMSS.s+DDMMSS).

Simbad objects: 191

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Number of rows : 191
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 SRGE J001624.3-715206 AGN 00 16 24.39 -71 52 06.3           ~ 1 0
2 SRGE J001707.6-713856 AGN 00 17 07.68 -71 38 56.7           ~ 1 0
3 SRGE J001716.3-715750 AGN 00 17 16.31 -71 57 50.7           ~ 1 0
4 V* AQ Tuc SB* 00 17 21.5137561416 -71 54 56.847230100   10.44 10.12     F3/5(+A) 85 0
5 LEDA 266917 AGN 00 17 26.2274455776 -71 50 31.900907544   17.32   16.03   ~ 6 0
6 SRGE J001732.2-720357 AGN 00 17 32.21 -72 03 57.3           ~ 1 0
7 SRGE J001737.0-722611 AGN 00 17 37.03 -72 26 11.0           ~ 1 0
8 SRGE J001746.4-720456 AGN 00 17 46.42 -72 04 56.5           ~ 1 0
9 SRGE J001756.9-722220 AGN 00 17 56.96 -72 22 20.4           ~ 1 0
10 SRGE J001757.0-714114 AGN 00 17 57.00 -71 41 14.6           ~ 1 0
11 SRGE J001800.9-713807 AGN 00 18 00.91 -71 38 07.9           ~ 1 0
12 SRGE J001801.4-714213 AGN 00 18 01.43 -71 42 13.9           ~ 1 0
13 HD 1446 SB* 00 18 02.5640284872 -71 51 24.106659732   10.43 9.91     F6V 15 0
14 SRGE J001805.8-715552 QSO 00 18 06.5421279576 -71 55 54.166620828           ~ 2 0
15 SRGE J001813.1-722913 AGN 00 18 13.19 -72 29 13.4           ~ 1 0
16 Cl* NGC 104 WSB V60 V* 00 18 21.2085187056 -72 26 24.553354596           ~ 5 0
17 SRGE J001823.9-723123 AGN 00 18 23.90 -72 31 23.0           ~ 1 0
18 SRGE J001844.6-723216 AGN 00 18 44.67 -72 32 16.3           ~ 1 0
19 SRGE J001907.9-715911 AGN 00 19 07.98 -71 59 11.5           ~ 1 0
20 SRGE J001911.4-713834 AGN 00 19 11.49 -71 38 34.1           ~ 1 0
21 SRGE J001914.3-713505 AGN 00 19 14.39 -71 35 05.7           ~ 1 0
22 SRGE J001920.3-721857 AGN 00 19 20.38 -72 18 57.1           ~ 1 0
23 SRGE J001921.0-720000 AGN 00 19 21.07 -72 00 00.5           ~ 1 0
24 SRGE J001923.1-715243 AGN 00 19 23.18 -71 52 43.1           ~ 1 0
25 SRGE J001932.6-721935 AGN 00 19 32.62 -72 19 35.2           ~ 1 0
26 SRGE J001936.3-721847 AGN 00 19 36.34 -72 18 47.4           ~ 1 0
27 Cl* NGC 104 LEE 2307 * 00 19 43.1187290544 -72 10 57.868904028   14.91       ~ 4 0
28 SRGE J001950.4-720600 AGN 00 19 50.40 -72 06 00.2           ~ 1 0
29 SRGE J001958.8-715820 AGN 00 19 58.80 -71 58 20.3           ~ 1 0
30 SRGE J001959.0-715732 AGN 00 19 59.02 -71 57 32.3           ~ 1 0
31 SRGE J001959.4-720950 AGN 00 19 59.42 -72 09 50.9           ~ 1 0
32 SRGE J002009.0-723416 AGN 00 20 09.07 -72 34 16.8           ~ 1 0
33 SRGE J002010.1-714320 AGN 00 20 10.17 -71 43 20.1           ~ 1 0
34 SRGE J002017.4-721048 AGN 00 20 17.47 -72 10 48.7           ~ 1 0
35 Cl* NGC 104 LEE 2407 * 00 20 22.6419456528 -72 10 40.001696724   13.30       ~ 5 0
36 SRGE J002029.1-723745 AGN 00 20 29.11 -72 37 45.0           ~ 1 0
37 SRGE J002038.9-722734 AGN 00 20 38.96 -72 27 34.0           ~ 1 0
38 SRGE J002043.8-723325 AGN 00 20 43.81 -72 33 25.7           ~ 1 0
39 SRGE J002048.8-720814 * 00 20 48.87 -72 08 14.1           ~ 1 0
40 SRGE J002050.5-713229 * 00 20 50.54 -71 32 29.1           ~ 1 0
41 SRGE J002052.5-714103 AGN 00 20 52.57 -71 41 03.5           ~ 1 0
42 Cl* NGC 104 KKM B3 AGN 00 20 54.56 -72 14 33.7   20.39 19.95     ~ 2 0
43 SRGE J002055.2-723908 AGN 00 20 55.22 -72 39 08.7           ~ 1 0
44 SRGE J002102.7-720852 AGN 00 21 02.72 -72 08 52.8           ~ 1 0
45 SRGE J002105.5-721837 AGN 00 21 05.59 -72 18 37.9           ~ 1 0
46 SRGE J002114.4-713307 AGN 00 21 14.40 -71 33 07.5           ~ 1 0
47 SRGE J002115.0-714446 AGN 00 21 15.00 -71 44 46.6           ~ 1 0
48 SRGE J002118.9-715240 AGN 00 21 18.98 -71 52 40.1           ~ 1 0
49 SRGE J002123.4-713915 AGN 00 21 23.44 -71 39 15.6           ~ 1 0
50 2MASS J00212658-7224206 * 00 21 26.5727198064 -72 24 20.793994632           ~ 3 0
51 Cl* NGC 104 TUC 338 XB* 00 21 37.1375823696 -71 38 59.730712692   16.24       ~ 3 0
52 Cl* NGC 104 LEE 2531 XB* 00 21 40.3958182992 -72 15 40.105413000   14.38       ~ 6 0
53 SRGE J002142.1-714439 AGN 00 21 42.12 -71 44 39.7           ~ 1 0
54 SRGE J002143.4-714226 AGN 00 21 43.46 -71 42 26.9           ~ 1 0
55 SRGE J002148.7-713932 AGN 00 21 48.73 -71 39 32.1           ~ 1 0
56 SRGE J002204.7-713349 AGN 00 22 04.78 -71 33 49.5           ~ 1 0
57 SRGE J002205.6-722309 AGN 00 22 05.65 -72 23 09.2           ~ 1 0
58 SRGE J002210.5-714429 AGN 00 22 10.53 -71 44 29.7           ~ 1 0
59 Cl* NGC 104 LEE 1412 * 00 22 13.0348263888 -72 21 32.976331920   12.09 11.64     ~ 3 0
60 SRGE J002221.6-724344 AGN 00 22 21.68 -72 43 44.5           ~ 1 0
61 Cl* NGC 104 LEE 2713 XB* 00 22 26.1602606568 -72 06 43.666046244   14.45       ~ 3 0
62 SRGE J002226.2-720355 AGN 00 22 26.21 -72 03 55.0           ~ 1 0
63 SRGE J002226.4-715027 AGN 00 22 26.40 -71 50 27.2           ~ 1 0
64 SRGE J002227.7-712903 AGN 00 22 27.73 -71 29 03.2           ~ 1 0
65 SRGE J002245.2-715908 XB* 00 22 45.28 -71 59 08.3           ~ 1 0
66 SRGE J002246.0-721022 XB* 00 22 46.04 -72 10 22.8           ~ 1 0
67 SRGE J002252.4-714219 AGN 00 22 52.49 -71 42 19.5           ~ 1 0
68 SRGE J002255.0-714444 AGN 00 22 55.06 -71 44 44.4           ~ 1 0
69 SRGE J002303.6-713524 AGN 00 23 03.61 -71 35 24.1           ~ 1 0
70 SRGE J002307.7-721317 AGN 00 23 07.74 -72 13 17.4           ~ 1 0
71 SRGE J002312.3-713405 AGN 00 23 12.39 -71 34 05.5           ~ 1 0
72 SRGE J002316.8-720224 XB* 00 23 16.89 -72 02 24.3           ~ 1 0
73 Cl* NGC 104 LEE 4411 XB* 00 23 19.1558293944 -71 48 35.546177448   15.14 14.13   13.08 ~ 5 0
74 2MASS J00233026-7211050 XB* 00 23 30.2917024326 -72 11 04.926765388           ~ 2 0
75 6dFGS gJ002330.3-713535 AGN 00 23 30.4179378360 -71 35 35.768910804   16.6       ~ 4 0
76 2MASS J00233071-7220436 AGN 00 23 30.7310522112 -72 20 43.666192608           ~ 7 0
77 SRGE J002340.5-714309 AGN 00 23 40.58 -71 43 09.2           ~ 1 0
78 SRGE J002345.1-713558 AGN 00 23 45.18 -71 35 58.3           ~ 1 0
79 SRGE J002349.5-724033 AGN 00 23 49.50 -72 40 33.1           ~ 1 0
80 SRGE J002351.1-712802 AGN 00 23 51.19 -71 28 02.8           ~ 1 0
81 SRGE J002354.9-721226 AGN 00 23 54.94 -72 12 26.4           ~ 1 0
82 SRGE J002355.0-712936 * 00 23 55.09 -71 29 36.5           ~ 1 0
83 SRGE J002355.6-713153 AGN 00 23 55.67 -71 31 53.0           ~ 1 0
84 CD-73 14 * 00 23 57.7058 -72 18 57.780   10.74 10.08     ~ 7 0
85 LEDA 262277 AGN 00 23 59.4532380336 -72 32 54.290720652   16.74   15.28   ~ 5 0
86 2MASS J00240096-7227073 PM* 00 24 00.9965382456 -72 27 07.385046300           ~ 2 0
87 HD 2041 ** 00 24 01.7808298 -72 15 13.500718   9.391 8.925     F6IV/V 15 0
88 SRGE J002401.8-715116 AGN 00 24 01.83 -71 51 16.5           ~ 1 0
89 SRGE J002401.8-712930 AGN 00 24 01.83 -71 29 30.1           ~ 1 0
90 2MASS J00240336-7155473 AB* 00 24 03.3725561784 -71 55 47.325779616   13.142 11.645 11.305 9.986 ~ 20 0
91 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
92 SRGE J002409.7-713456 AGN 00 24 09.70 -71 34 56.5           ~ 1 0
93 HD 2072 * 00 24 14.4577194336 -71 58 49.256355936   9.85 9.09     G5 11 0
94 SRGE J002414.9-713939 AGN 00 24 14.94 -71 39 39.9           ~ 1 0
95 SRGE J002420.7-721209 * 00 24 20.75 -72 12 09.2           ~ 2 0
96 SRGE J002428.0-712516 AGN 00 24 28.05 -71 25 16.4           ~ 1 0
97 SRGE J002430.7-723136 AGN 00 24 30.78 -72 31 36.2           ~ 1 0
98 Cl* NGC 104 CHUN 3-420 * 00 24 35.5831037715 -72 14 45.146681199   12.395 11.678 11.624   ~ 8 0
99 SRGE J002437.4-714619 AGN 00 24 37.40 -71 46 19.8           ~ 1 0
100 SRGE J002440.1-713328 AGN 00 24 40.13 -71 33 28.1           ~ 1 0
101 SRGE J002444.2-720819 XB* 00 24 44.21 -72 08 19.0           ~ 2 0
102 SRGE J002445.9-720859 XB* 00 24 45.96 -72 08 59.0           ~ 1 0
103 SRGE J002448.2-714916 AGN 00 24 48.29 -71 49 16.2           ~ 1 0
104 SRGE J002452.7-713550 AGN 00 24 52.74 -71 35 50.5           ~ 1 0
105 SRGE J002456.9-720651 XB* 00 24 56.97 -72 06 51.8           ~ 3 0
106 SRGE J002513.8-723132 AGN 00 25 13.85 -72 31 32.1           ~ 1 0
107 SRGE J002517.3-712457 AGN 00 25 17.37 -71 24 57.0           ~ 1 0
108 Cl* NGC 104 LEE 5741 XB* 00 25 18.5858656416 -71 58 08.143627872   16.15       ~ 3 0
109 SRGE J002527.1-712835 AGN 00 25 27.13 -71 28 35.7           ~ 1 0
110 SRGE J002531.3-713259 AGN 00 25 31.38 -71 32 59.9           ~ 1 0
111 SRGE J002542.4-713111 AGN 00 25 42.46 -71 31 11.5           ~ 1 0
112 Cl* NGC 104 LEE 8518 XB* 00 25 44.1753238824 -72 18 53.533195020   14.21 13.11     ~ 7 0
113 SRGE J002548.3-722208 AGN 00 25 48.39 -72 22 08.9           ~ 1 0
114 SRGE J002552.1-722300 AGN 00 25 52.11 -72 23 00.7           ~ 1 0
115 SRGE J002558.2-712542 AGN 00 25 58.21 -71 25 42.6           ~ 1 0
116 SRGE J002600.9-713812 AGN 00 26 00.99 -71 38 12.4           ~ 1 0
117 Cl* NGC 104 LEE 5306 PM* 00 26 05.9745931080 -71 47 28.900356324   13.33       ~ 4 0
118 SRGE J002607.2-721857 AGN 00 26 07.20 -72 18 57.9           ~ 1 0
119 SRGE J002609.1-714247 AGN 00 26 09.10 -71 42 47.8           ~ 1 0
120 SRGE J002614.2-713506 AGN 00 26 14.23 -71 35 06.7           ~ 1 0
121 Cl* NGC 104 LEE 5105 * 00 26 21.9049797648 -71 40 00.614410572   12.98 11.93     ~ 4 0
122 SRGE J002635.6-722128 AGN 00 26 35.67 -72 21 28.6           ~ 1 0
123 SRGE J002643.4-721819 AGN 00 26 43.40 -72 18 19.0           ~ 1 0
124 SRGE J002644.3-722752 AGN 00 26 44.34 -72 27 52.0           ~ 1 0
125 SRGE J002644.9-714042 AGN 00 26 44.92 -71 40 42.4           ~ 1 0
126 SRGE J002647.1-713203 AGN 00 26 47.14 -71 32 03.7           ~ 1 0
127 SRGE J002650.7-721356 AGN 00 26 50.76 -72 13 56.7           ~ 1 0
128 SRGE J002658.6-721855 AGN 00 26 58.68 -72 18 55.6           ~ 1 0
129 SRGE J002700.6-722651 AGN 00 27 00.67 -72 26 51.4           ~ 1 0
130 SRGE J002702.3-713726 AGN 00 27 02.38 -71 37 26.9           ~ 1 0
131 SRGE J002704.2-720353 AGN 00 27 04.26 -72 03 53.8           ~ 1 0
132 SRGE J002705.4-721052 AGN 00 27 05.43 -72 10 52.4           ~ 1 0
133 SRGE J002714.4-714334 QSO 00 27 14.0553219360 -71 43 33.706639236           ~ 2 0
134 SRGE J002715.4-723343 AGN 00 27 15.46 -72 33 43.7           ~ 1 0
135 SRGE J002722.0-714510 AGN 00 27 22.03 -71 45 10.0           ~ 1 0
136 SRGE J002723.6-715010 AGN 00 27 23.61 -71 50 10.5           ~ 1 0
137 SRGE J002725.7-723157 AGN 00 27 25.79 -72 31 57.9           ~ 1 0
138 SRGE J002729.7-723046 AGN 00 27 29.77 -72 30 46.3           ~ 1 0
139 SRGE J002730.7-714606 AGN 00 27 30.79 -71 46 06.2           ~ 1 0
140 SRGE J002731.2-723454 AGN 00 27 31.27 -72 34 54.5           ~ 1 0
141 SRGE J002734.3-720638 AGN 00 27 34.36 -72 06 38.7           ~ 1 0
142 SRGE J002739.6-722812 AGN 00 27 39.61 -72 28 12.5           ~ 1 0
143 SRGE J002743.4-714503 AGN 00 27 43.43 -71 45 03.3           ~ 1 0
144 2MASS J00274425-7228066 AB? 00 27 44.254 -72 28 06.68 19.37 18.33 17.43   14.10 ~ 3 0
145 SRGE J002745.2-723227 AGN 00 27 45.27 -72 32 27.9           ~ 1 0
146 SRGE J002745.3-720919 AGN 00 27 45.36 -72 09 19.4           ~ 1 0
147 SRGE J002751.1-722419 AGN 00 27 51.18 -72 24 19.5           ~ 1 0
148 Cl* NGC 104 LEE 7305 * 00 27 52.8930112752 -72 16 28.023948588   16.40 15.40     ~ 4 0
149 SRGE J002810.0-714017 AGN 00 28 10.02 -71 40 17.1           ~ 1 0
150 SRGE J002811.0-721248 AGN 00 28 11.01 -72 12 48.8           ~ 1 0
151 SRGE J002811.6-715116 AGN 00 28 11.60 -71 51 16.2           ~ 1 0
152 SRGE J002823.5-722642 AGN 00 28 23.57 -72 26 42.8           ~ 1 0
153 SRGE J002830.1-720523 AGN 00 28 30.19 -72 05 23.0           ~ 1 0
154 SRGE J002833.6-714412 AGN 00 28 33.62 -71 44 12.8           ~ 1 0
155 SRGE J002847.3-721426 AGN 00 28 47.37 -72 14 26.7           ~ 1 0
156 SRGE J002855.0-720608 AGN 00 28 55.05 -72 06 08.1           ~ 1 0
157 SRGE J002857.0-723802 AGN 00 28 57.07 -72 38 02.9           ~ 1 0
158 SRGE J002858.7-715430 AGN 00 28 58.70 -71 54 30.8           ~ 1 0
159 SRGE J002902.8-722327 AGN 00 29 02.83 -72 23 27.9           ~ 1 0
160 SRGE J002918.8-715030 AGN 00 29 18.85 -71 50 30.6           ~ 1 0
161 SRGE J002920.5-723016 AGN 00 29 20.57 -72 30 16.0           ~ 1 0
162 SRGE J002930.5-722046 AGN 00 29 30.50 -72 20 46.7           ~ 1 0
163 SRGE J002938.8-720433 AGN 00 29 38.86 -72 04 33.5           ~ 1 0
164 SRGE J002941.3-714710 AGN 00 29 41.35 -71 47 10.3           ~ 1 0
165 SRGE J002949.6-720948 AGN 00 29 49.61 -72 09 48.0           ~ 1 0
166 SRGE J002956.9-714637 QSO 00 29 56.4812266152 -71 46 38.048989800           ~ 2 0
167 SRGE J003000.8-721158 AGN 00 30 00.85 -72 11 58.5           ~ 1 0
168 SRGE J003008.3-723306 AGN 00 30 08.34 -72 33 06.0           ~ 1 0
169 TYC 9137-1597-1 SB* 00 30 16.6540858920 -71 43 15.350038860   13.48 12.32     ~ 2 0
170 SRGE J003018.2-721725 AGN 00 30 18.21 -72 17 25.4           ~ 1 0
171 SRGE J003025.9-715346 AGN 00 30 25.96 -71 53 46.6           ~ 1 0
172 SRGE J003030.0-721308 AGN 00 30 30.04 -72 13 08.2           ~ 1 0
173 SRGE J003037.8-720444 AGN 00 30 37.83 -72 04 44.2           ~ 1 0
174 SRGE J003041.7-714503 AGN 00 30 41.72 -71 45 03.1           ~ 1 0
175 SRGE J003045.8-722910 * 00 30 45.87 -72 29 10.2           ~ 1 0
176 SRGE J003049.2-720148 AGN 00 30 49.27 -72 01 48.3           ~ 1 0
177 SRGE J003052.3-720904 AGN 00 30 52.33 -72 09 04.6           ~ 1 0
178 SRGE J003101.4-721437 AGN 00 31 01.40 -72 14 37.5           ~ 1 0
179 HD 2865 * 00 31 04.9947003888 -71 44 11.447183220   10.725 10.192     F8V 13 0
180 SRGE J003107.3-714609 AGN 00 31 07.33 -71 46 09.5           ~ 1 0
181 SRGE J003108.1-721419 AGN 00 31 08.16 -72 14 19.7           ~ 1 0
182 SRGE J003111.6-721852 AGN 00 31 11.61 -72 18 52.9           ~ 1 0
183 SRGE J003115.8-722843 AGN 00 31 15.88 -72 28 43.5           ~ 1 0
184 HD 2898 * 00 31 21.0617881032 -72 09 56.735619876   9.79 9.38     A9IV/V 17 0
185 SRGE J003125.6-715004 AGN 00 31 25.65 -71 50 04.7           ~ 1 0
186 UCAC4 091-001374 * 00 31 39.9779902635 -71 57 57.166150057   13.199 12.295 12.110   ~ 4 0
187 SRGE J003205.7-720337 AGN 00 32 05.71 -72 03 37.1           ~ 1 0
188 SRGE J003243.1-720908 AGN 00 32 43.18 -72 09 08.6           ~ 1 0
189 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
190 V* RS CVn RS* 13 10 36.9077924448 +35 56 05.584994412 8.57 8.51 7.93 7.7   F6IV+G8IV 753 0
191 V* BY Dra BY* 18 33 55.7720712062 +51 43 08.897780286 10.22 9.23   8.733   K4Ve+K7.5Ve 639 0

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