2004A&A...418..509V


Query : 2004A&A...418..509V

2004A&A...418..509V - Astronomy and Astrophysics, volume 418, 509-523 (2004/5-1)

A Chandra observation of the old open cluster M67.

VAN DEN BERG M., TAGLIAFERRI G., BELLONI T. and VERBUNT F.

Abstract (from CDS):

We present the results of a 47-ks Chandra-ACIS observation of the old open cluster M67. We detected 25 proper-motion cluster members (including ten new sources) and 12 sources (all new) that we suspect to be members from their locations close to the main sequence (1<B-V<1.7). Of the detected members, 23 are binaries. Among the new sources that are members and probable members are four spectroscopic binaries with Porb<12d, two contact binaries and two periodic photometric variables with Pph < 8.4 d. Their X-rays are likely the result of coronal activity enhanced by tidally locked rapid rotation. The X-rays of the new source S997, a blue straggler in a wide eccentric orbit, are puzzling. Spectral fits show that the X-rays of the brightest sources S1063 (a binary with a sub-subgiant), S1082 (a triple blue straggler with a close binary) and S1040 (a circular binary of a giant and a cool white dwarf), are consistent with coronal emission. We detected a new bright source that must have brightened at least about ten times since the time of the ROSAT observations. It is not clear whether its faint blue optical counterpart belongs to M67. We discuss the possibility that this source is a low-mass X-ray binary in quiescence, which would be the first of its kind in an open cluster. In addition to cluster members, we detected about 100 background sources, many of which we identify with faint objects in the ESO Imaging Survey.

Abstract Copyright:

Journal keyword(s): stars: activity - stars: binaries: general - stars: blue stragglers - open clusters and associations: individual: M67 - X-rays: binaries

VizieR on-line data: <Available at CDS (J/A+A/418/509): table1.dat notes.dat table4.dat>

Nomenclature: Table 1, col(1): [VTB2004] CX NNN (Nos 1-158). Table 1, last col.: Cl* NGC 2682 EIS NNNN N=43 among (Nos 207-3701).

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 178

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Number of rows : 178
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 NGC 188 OpC 00 47 12 +85 14.6           ~ 878 0
2 NGC 752 OpC 01 56 54 +37 47.6           ~ 599 0
3 [VTB2004] CX 122 X 08 50 49.04 +11 48 16.5           ~ 1 0
4 [VTB2004] CX 130 X 08 50 51.76 +11 49 21.1           ~ 1 0
5 [VTB2004] CX 99 X 08 50 52.25 +11 49 03.0           ~ 1 0
6 [BVM98] M 67 49 AGN 08 50 52.72 +11 47 43.7   22.13 21.86     ~ 4 0
7 NGC 2682 24 SB* 08 50 53.1648732419 +11 47 34.206354717 13.922 13.91 13.307 13.199 12.593 ~ 24 0
8 [VTB2004] CX 46 X 08 50 53.29 +11 49 43.5           ~ 1 0
9 Cl* NGC 2682 SAND 810 SB* 08 50 54.3002161944 +11 55 15.280425588 16.323 15.92 15.114   14.154 G7V 18 0
10 Cl* NGC 2682 SAND 819 RS* 08 50 54.9862572848 +11 56 50.269982215 17.667 16.92 15.905     ~ 21 0
11 [VTB2004] CX 136 X 08 50 55.66 +11 48 40.5           ~ 1 0
12 Cl* NGC 2682 ES I-43 * 08 50 56.2236755280 +11 45 15.833228400 18.497 17.41 16.280   14.967 ~ 12 0
13 [BVM98] M 67 24 X 08 50 56.50 +11 45 23.3   20.61 20.27     ~ 2 0
14 [VTB2004] CX 75 X 08 50 56.89 +11 50 26.4           ~ 1 0
15 [BVM98] M 67 15 AGN 08 50 57.104 +11 46 07.57   24.63 23.27     ~ 3 0
16 [VTB2004] CX 59 X 08 50 57.55 +11 52 51.5           ~ 1 0
17 [BVM98] M 67 36 X 08 50 57.55 +11 52 55.2           ~ 3 0
18 LB 3596 * 08 50 57.5866318200 +11 50 45.605576688 18.996 19.477 18.454   19.291 ~ 7 1
19 [VTB2004] CX 86 WD* 08 50 58.61 +11 45 38.8           DA 3 0
20 LB 3597 QSO 08 50 58.8449408328 +11 51 38.476080612 20.567 20.54 20.301     ~ 23 0
21 [VTB2004] CX 45 X 08 50 58.97 +11 51 37.4           ~ 1 0
22 [VTB2004] CX 128 X 08 51 01.15 +11 50 02.4           ~ 1 0
23 NGC 2682 51 SB* 08 51 01.5495469560 +11 49 34.326309756 13.485 13.22 12.57 12.54 11.976 G0IV 24 0
24 Cl* NGC 2682 ES IV-61 * 08 51 01.5612054240 +11 49 27.228376272 15.854 15.48 14.877   13.856 ~ 9 0
25 NGC 2682 62 SB* 08 51 02.1216094008 +11 49 01.315187544 14.013 13.90 13.297   12.579 G0V 17 0
26 [VTB2004] CX 93 X 08 51 02.73 +11 57 38.4           ~ 1 0
27 [VTB2004] CX 140 X 08 51 03.11 +11 46 59.5           ~ 1 0
28 Cl* NGC 2682 ES I-23 * 08 51 03.6146369568 +11 46 17.287883832 17.193 16.92 16.169   15.341 ~ 10 0
29 RX J085104+11462 X 08 51 03.818 +11 46 30.15   21.57 21.21     ~ 6 0
30 [VTB2004] CX 154 X 08 51 04.24 +11 49 07.4           ~ 1 0
31 [VTB2004] CX 56 X 08 51 04.60 +11 42 23.7           ~ 1 0
32 [BVM98] M 67 34 G 08 51 04.69 +11 55 29.7   22.80 21.99     ~ 3 0
33 Cl* NGC 2682 SAND 757 EB* 08 51 04.8272787384 +11 45 56.881089612 14.331 14.216 13.541   12.841 ~ 42 0
34 Cl* NGC 2682 FBC 2984 * 08 51 05.1947750400 +11 55 18.448051332   21.615 20.184   18.621 ~ 4 0
35 [VTB2004] CX 83 X 08 51 05.41 +11 48 10.7           ~ 1 0
36 Cl* NGC 2682 FBC 3011 * 08 51 06.3696114552 +11 54 18.817683984   19.874 18.361   16.217 ~ 10 0
37 [VTB2004] CX 106 X 08 51 07.09 +11 54 07.6           ~ 1 0
38 Cl* NGC 2682 SAND 1077 SB* 08 51 07.2254409816 +11 53 01.951858464 13.382 13.24 12.595   11.752 F9V 37 0
39 NGC 2682 70 * 08 51 07.8118960464 +11 48 09.326114712   11.96 11.522   11.036 F4IV 21 0
40 Cl* NGC 2682 ES IV-33 SB* 08 51 08.0039594736 +11 49 55.884208980 17.117 16.67 15.793 15.244 14.692 ~ 20 0
41 [VTB2004] CX 115 X 08 51 08.16 +11 52 50.8           ~ 1 0
42 [VTB2004] CX 87 X 08 51 08.73 +11 57 21.0           ~ 1 0
43 [VTB2004] CX 39 G 08 51 08.95 +11 50 43.5   22.02 20.62     ~ 2 0
44 [VTB2004] CX 134 X 08 51 09.09 +11 53 16.1           ~ 1 0
45 [VTB2004] CX 69 X 08 51 09.39 +11 49 02.1           ~ 1 0
46 [VTB2004] CX 85 X 08 51 09.77 +11 43 43.5           ~ 1 0
47 [VTB2004] CX 98 X 08 51 11.06 +11 45 35.3           ~ 1 0
48 [VTB2004] CX 138 X 08 51 11.24 +11 49 09.1           ~ 1 0
49 Cl* NGC 2682 FBC 3165 * 08 51 11.4094842144 +11 47 11.017823604   19.953 18.450   16.311 ~ 8 0
50 [VTB2004] CX 132 X 08 51 11.57 +11 46 32.5           ~ 1 0
51 [VTB2004] CX 52 X 08 51 11.73 +11 50 25.8           ~ 1 0
52 [VTB2004] CX 145 X 08 51 12.88 +11 47 39.5           ~ 1 0
53 Cl* NGC 2682 SAND 1063 RS* 08 51 13.3549065744 +11 51 40.172654052 15.557 14.84 13.573   12.591 G8IV 51 0
54 [VTB2004] CX 103 X 08 51 14.27 +11 53 55.1           ~ 1 0
55 [VTB2004] CX 137 X 08 51 15.83 +11 46 13.7           ~ 1 0
56 [VTB2004] CX 74 X 08 51 15.85 +11 48 37.2           ~ 1 0
57 [VTB2004] CX 142 X 08 51 15.89 +11 49 23.3           ~ 1 0
58 [VTB2004] CX 113 X 08 51 16.58 +11 51 22.4           ~ 1 0
59 Cl* NGC 2682 FBC 3348 * 08 51 17.0529379176 +11 48 26.807464440   18.804 17.410   15.793 ~ 10 0
60 [VTB2004] CX 79 X 08 51 17.09 +11 54 05.7           ~ 1 0
61 Cl* NGC 2682 ES I-50 SB* 08 51 17.7224075472 +11 44 29.561572500 16.629 16.26 15.347   14.281 ~ 26 0
62 Cl* NGC 2682 SAND 986 EB* 08 51 17.9917758696 +11 45 54.232467732 13.363 13.28 12.733   12.04 ~ 73 0
63 Cl* NGC 2682 ES IV-15 SB* 08 51 18.2619418512 +11 50 19.702239432 15.050 14.94 14.292 13.914 13.547 F9V 31 0
64 Cl* NGC 2682 SAND 999 RS* 08 51 18.6870620808 +11 47 02.715891216 13.632 13.38 12.569 12.143 11.69 ~ 80 0
65 [VTB2004] CX 101 X 08 51 18.72 +11 50 46.4           ~ 1 0
66 [VTB2004] CX 64 WD? 08 51 18.7811547528 +11 53 49.668752076           ~ 2 0
67 NGC 2682 119 RS* 08 51 19.0167198768 +11 50 05.755781940 13.197 13.13 12.547 12.177 11.837 F9IV 72 0
68 NGC 2682 120 RS* 08 51 19.1814084740 +11 47 54.691660489 14.248 14.23 13.707 13.307 12.968 F9V 34 0
69 Cl* NGC 2682 SAND 1070 RS* 08 51 19.6901093120 +11 52 10.753229665 14.643 14.52 13.939   13.156 G1V 42 0
70 NGC 2682 124 BS* 08 51 19.9070240880 +11 47 00.441178944 12.576 12.59 12.117 11.848 11.564 F5IV 80 0
71 [VTB2004] CX 90 X 08 51 19.94 +11 56 29.3           ~ 1 0
72 [VTB2004] CX 114 X 08 51 20.79 +11 45 50.4           ~ 1 0
73 Cl* NGC 2682 SAND 1082 EB* 08 51 20.7915 +11 53 26.168   11.66 11.150 11.09 10.722 F5IV 117 0
74 [VTB2004] CX 65 X 08 51 20.86 +11 53 56.4           ~ 1 0
75 [VTB2004] CX 89 QSO 08 51 21.61 +11 52 08.9           ~ 2 0
76 NGC 2682 136 SB* 08 51 21.7535381400 +11 52 37.872333372   11.92 11.235   10.595 G3III-IV 71 0
77 [VTB2004] CX 27 X 08 51 22.82 +11 48 14.2           ~ 1 0
78 Cl* NGC 2682 ES IV-4 SB* 08 51 22.9141132320 +11 48 49.440178944 13.245 13.27 12.695   12.033 F7IV 43 1
79 NGC 2682 OpC 08 51 23 +11 48.8           ~ 2220 0
80 [VTB2004] CX 112 X 08 51 23.12 +11 48 56.2           ~ 1 0
81 [VTB2004] CX 144 X 08 51 23.17 +11 46 52.3           ~ 1 0
82 [VTB2004] CX 110 X 08 51 23.23 +11 47 14.8           ~ 1 0
83 Cl* NGC 2682 SAND 1019 SB* 08 51 23.2771502112 +11 48 26.560354284 15.407 15.15 14.440 13.842 13.338 G0V 30 0
84 Cl* NGC 2682 FBC 3559 * 08 51 23.4677209704 +11 44 46.197378132 20.860 19.963 18.431   16.428 ~ 8 0
85 NGC 2682 143 SB* 08 51 23.7746734704 +11 49 49.338989364   12.39 11.420   10.61 G4III 84 0
86 [VTB2004] CX 131 X 08 51 24.30 +11 50 39.1           ~ 1 0
87 [VTB2004] CX 28 X 08 51 24.81 +11 53 31.3           ~ 1 0
88 [VTB2004] CX 143 X 08 51 24.93 +11 47 40.5           ~ 1 0
89 NGC 2682 147 RS* 08 51 24.9497688840 +11 49 00.800179176 13.897 13.84 13.282 12.906 12.545 G0V 28 0
90 [VTB2004] CX 92 X 08 51 25.04 +11 48 00.8           ~ 1 0
91 [VTB2004] CX 63 X 08 51 25.36 +11 57 47.5           ~ 1 0
92 [VTB2004] CX 126 X 08 51 25.92 +11 53 43.3           ~ 1 0
93 [VTB2004] CX 108 X 08 51 25.99 +11 43 55.4           ~ 1 0
94 V* ET Cnc EB* 08 51 26.7153102238 +11 56 12.173349613 17.711 16.98 15.850     ~ 26 0
95 [VTB2004] CX 96 X 08 51 26.98 +11 46 38.0           ~ 1 0
96 [BVM98] M 67 32 AGN 08 51 27.129 +11 55 24.97   25.82 23.46     ~ 3 0
97 V* EU Cnc CV* 08 51 27.1835851536 +11 46 56.996141700   21.93 21.75     ~ 39 0
98 [VTB2004] CX 37 X 08 51 27.38 +11 45 04.3           ~ 1 0
99 NGC 2682 159 * 08 51 27.8885213448 +11 55 40.949794380 14.598 13.94 13.320   12.625 G1IV 43 0
100 Cl* NGC 2682 SAND 1036 EB* 08 51 28.1469477144 +11 49 27.495860592 13.262 13.27 12.809   12.184 F3 71 0
101 Cl* NGC 2682 SAND 996 SB* 08 51 28.3425078672 +11 46 49.488364668 16.323 15.86 14.972 14.448 13.977 G5V 23 0
102 [VTB2004] CX 12 X 08 51 28.356 +11 41 28.28   22.52 22.40     ~ 3 0
103 [VTB2004] CX 102 X 08 51 28.42 +11 52 52.1           ~ 1 0
104 [VTB2004] CX 119 X 08 51 28.45 +11 53 06.6           ~ 1 0
105 [VTB2004] CX 41 X 08 51 28.90 +11 48 07.4           ~ 2 0
106 [VTB2004] CX 127 X 08 51 29.29 +11 47 25.0           ~ 1 0
107 [VTB2004] CX 121 X 08 51 29.56 +11 56 19.5           ~ 1 0
108 [VTB2004] CX 107 X 08 51 29.91 +11 44 28.3           ~ 1 0
109 [VTB2004] CX 42 X 08 51 30.30 +11 54 39.7           ~ 1 0
110 [VTB2004] CX 29 X 08 51 30.58 +11 50 44.8           ~ 2 0
111 NGC 2682 176 SB* 08 51 31.2372498181 +11 45 50.657346109 13.242 13.22 12.624 12.312 11.950 F9V 41 0
112 Cl* NGC 2682 FBC 3814 * 08 51 31.5495427392 +11 50 32.320065120           ~ 6 0
113 [VTB2004] CX 120 X 08 51 31.83 +11 45 44.4           ~ 1 0
114 [VTB2004] CX 156 X 08 51 32.13 +11 50 42.3           ~ 1 0
115 Cl* NGC 2682 ES II-229 * 08 51 32.6283944712 +11 45 59.838259392   20.912 19.265 18.762 17.024 ~ 8 0
116 [VTB2004] CX 55 X 08 51 33.80 +11 43 27.8           ~ 1 0
117 NGC 2682 188 BS* 08 51 34.2565152264 +11 50 54.499637148 14.277 14.27 13.774 13.389 13.028 F8V 24 0
118 Cl* NGC 2682 SAND 1284 dS* 08 51 34.3150275672 +11 51 10.497400452   11.17 10.92   10.622 B9V 91 0
119 V* EY Cnc Ro* 08 51 35.1509860296 +11 50 31.585825032   21.434 19.851 17.9 18.365 ~ 7 0
120 [VTB2004] CX 66 X 08 51 35.22 +11 56 51.7           ~ 1 0
121 [VTB2004] CX 158 X 08 51 35.37 +11 48 32.8           ~ 1 0
122 Cl* NGC 2682 SAND 1203 SB* 08 51 35.5401707784 +11 39 46.985666436 15.252 15.12 14.415   13.504 G4V 15 0
123 [BVM98] M 67 48 G 08 51 35.70 +11 48 00.9   22.72 22.38     ~ 3 0
124 [VTB2004] CX 135 X 08 51 35.73 +11 43 25.7           ~ 1 0
125 [VTB2004] CX 97 X 08 51 35.79 +11 53 24.9           ~ 1 0
126 NGC 2682 195 SB* 08 51 36.0102891818 +11 46 33.602537041 13.539 13.4 12.682 12.328 11.915 G1V 51 0
127 [VTB2004] CX 40 X 08 51 36.20 +11 44 46.0           ~ 2 0
128 [VTB2004] CX 133 X 08 51 37.38 +11 50 17.0           ~ 1 0
129 Cl* NGC 2682 SAND 1282 EB* 08 51 37.8473566296 +11 50 57.092451072 13.964 13.89 13.333   12.634 F7V 155 0
130 2XMM J085138.4+114906 G 08 51 38.390 +11 49 06.07   20.94 20.79     ~ 4 0
131 [VTB2004] CX 71 X 08 51 38.52 +11 54 12.3   21.99 21.42     ~ 2 0
132 [VTB2004] CX 84 X 08 51 40.80 +11 48 13.5           ~ 1 0
133 [VTB2004] CX 123 X 08 51 41.38 +11 46 56.1           ~ 1 0
134 [VTB2004] CX 91 X 08 51 41.60 +11 53 08.2           ~ 1 0
135 NGC 2682 219 SB* 08 51 42.4520308920 +11 49 51.965419080 13.158 13.11 12.606   11.817 F7V 29 0
136 [VTB2004] CX 129 X 08 51 43.09 +11 51 05.4           ~ 2 0
137 [VTB2004] CX 73 X 08 51 43.13 +11 40 00.1           ~ 2 0
138 [VTB2004] CX 70 G 08 51 44.05 +11 48 49.7   22.82 22.79     ~ 2 0
139 [VTB2004] CX 60 X 08 51 44.50 +11 45 47.0           ~ 1 0
140 [VTB2004] CX 22 G 08 51 46.16 +11 49 50.3   23.32 22.12     ~ 2 0
141 [VTB2004] CX 105 X 08 51 46.20 +11 42 50.2           ~ 1 0
142 Cl* NGC 2682 EIS 600 QSO 08 51 46.5697284720 +11 52 02.761924620   20.92 20.74     ~ 4 0
143 [VTB2004] CX 125 X 08 51 48.27 +11 51 02.8           ~ 1 0
144 NGC 2682 241 * 08 51 49.1427101712 +11 49 43.607392284 13.385 13.31 12.759   12.025 F8IV 33 0
145 [VTB2004] CX 151 X 08 51 49.82 +11 45 28.9           ~ 1 0
146 LB 6378 QSO 08 51 49.9413614904 +11 49 52.279783788   20.77 20.64     ~ 14 0
147 NGC 2682 244 RG* 08 51 50.2026472872 +11 46 06.919342284   11.72 10.700   9.820 G8III 80 0
148 Cl* NGC 2682 FBC 4345 * 08 51 50.33 +11 48 55.9           ~ 2 0
149 [VTB2004] CX 100 X 08 51 50.37 +11 44 31.1           ~ 1 0
150 [VTB2004] CX 116 X 08 51 52.03 +11 51 10.6           ~ 1 0
151 [VTB2004] CX 35 X 08 51 53.18 +11 36 56.8           ~ 1 0
152 [VTB2004] CX 124 X 08 51 53.94 +11 53 42.2           ~ 1 0
153 [VTB2004] CX 43 X 08 51 55.81 +11 50 44.5           ~ 1 0
154 NGC 2682 261 * 08 51 56.0039584272 +11 51 26.532969048   10.91 10.589   10.317 A3 21 0
155 [VTB2004] CX 150 X 08 52 01.1 +11 42 22           ~ 1 0
156 [VTB2004] CX 44 X 08 52 05.8 +11 37 13           ~ 1 0
157 Cl* NGC 2682 SAND 1414 * 08 52 06.3658987440 +11 37 31.149933636 15.539 15.453 14.717   13.881 ~ 14 0
158 [VTB2004] CX 26 X 08 52 07.4 +11 41 18           ~ 1 0
159 Cl* NGC 2682 EIS 2018 QSO 08 52 07.47 +11 41 14.5   21.67 21.52     ~ 4 0
160 [VTB2004] CX 51 X 08 52 08.47 +11 47 59.2           ~ 1 0
161 [VTB2004] CX 34 X 08 52 10.41 +11 47 21.0           ~ 1 0
162 [VTB2004] CX 80 X 08 52 12.80 +11 49 49.6           ~ 2 0
163 [VTB2004] CX 11 X 08 52 13.78 +11 46 26.0           ~ 1 0
164 Cl* NGC 2682 FBC 4960 * 08 52 14.4091238640 +11 46 33.022657236 17.263 16.78 15.807   14.688 ~ 15 0
165 Cl* NGC 2682 SAND 1601 EB* 08 52 16.8391686288 +11 48 31.249877400   15.45 14.651   13.33 ~ 17 0
166 [VTB2004] CX 54 X 08 52 16.9 +11 41 21           ~ 1 0
167 Cl* NGC 2682 FBC 5023 Ro* 08 52 17.0383800336 +11 41 09.065716296 19.661 18.595 16.919   14.255 ~ 8 0
168 [VTB2004] CX 147 X 08 52 18.2 +11 46 15           ~ 1 0
169 [VTB2004] CX 148 X 08 52 21.0 +11 42 07           ~ 1 0
170 [VTB2004] CX 38 X 08 52 22.1 +11 39 12           ~ 1 0
171 [VTB2004] CX 25 X 08 52 22.59 +11 45 37.3           ~ 1 0
172 [VTB2004] CX 18 X 08 52 25.1 +11 45 21           ~ 1 0
173 [VTB2004] CX 50 X 08 52 27.0 +11 37 35           ~ 1 0
174 [VTB2004] CX 30 X 08 52 27.7 +11 41 14           ~ 1 0
175 [VTB2004] CX 146 X 08 52 28.0 +11 50 55           ~ 1 0
176 IC 4651 OpC 17 24 51 -49 55.0           ~ 335 0
177 V* V4580 Sgr LXB 18 08 27.54 -36 58 44.3   16.81 16.51     ~ 940 0
178 NGC 6940 OpC 20 34 30 +28 16.7           ~ 175 0

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2022.12.10-05:57:17

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