2015MNRAS.452.3394M

Query : 2015MNRAS.452.3394M

2015MNRAS.452.3394M - Mon. Not. R. Astron. Soc., 452, 3394-3407 (2015/October-1)

Study of X-ray emission from the old open cluster, M67.

MOOLEY K.P. and SINGH K.P.

Abstract (from CDS):

We present an X-ray analysis of a 4 Gyr old open cluster, M67, using archival XMM-Newton data. The aim of this study was to find new X-ray members of M67, and to use the updated member list for studying X-ray variability, and derive the X-ray luminosity functions (XLFs) of different stellar types and compare them with other star clusters of similar age. We report the detection of X-ray emission from 25 members of M67, with membership based primarily on their proper motion, of which one X-ray source is a new member. Supplementing this study with previous ROSAT and Chandra studies of M67, and using the most recent proper motion study by Vereshchagin et al., we have compiled a revised list of X-ray emitting members of M67 consisting of 43 stars. 16 of these are known RS CVn type binaries having orbital periods <10 d, and near-circular orbits, five are contact binaries with orbital periods <6 h, five are yellow and blue stragglers, two are Algol-type binaries, and one source is a cataclysmic variable. 14 members do not have any orbital information and cannot be classified. 14 of the X-ray sources detected do not have any optical counterpart down to a magnitude of V ≃ 22, and their membership is uncertain. Finally, we report the XLFs of RS CVn type and other types of stars in M67 and compare them with other open clusters of intermediate-to-old age.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

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

Nomenclature: Table 2: [MS2015] NX NN (Nos 1-75).

CDS comments: Simbad identifiers: ENNNN = Cl* NGC 2682 EIS NNNNN (2004A&A...418..509V); YNNNN = Cl* NGC 2682 YBP NNNN (2008A&A...484..609Y); CX NNN = [VTB2004] CX NNN (2008A&A...484..609Y); RX NN = [BVM98] M 67 NN (1998A&A...339..431B).

Simbad objects: 103

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Number of rows : 103
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 188 OpC 00 47 14.8 +85 14 42           ~ 990 0
2 BD+12 1917 V* 08 49 56.8183190424 +11 41 32.987890788   11.2 9.782   8.540 K3III 78 1
3 [MS2015] NX 47 X 08 50 32.58 +11 53 54.3           ~ 1 0
4 Cl* NGC 2682 SAND 628 CV* 08 50 36.9972256176 +11 54 04.678000848 15.522 15.23 14.522     F9 34 0
5 RX J085038+11472 AGN 08 50 37.97 +11 47 09.3   24.95 22.94     ~ 4 0
6 SDSS J085052.71+114742.8 AGN 08 50 52.71794 +11 47 42.8980   22.13 21.86     ~ 5 0
7 [MS2015] NX 52 QSO 08 50 53.1427592280 +11 59 26.941347888   22.17 22.17     ~ 1 0
8 NGC 2682 24 SB* 08 50 53.1648732419 +11 47 34.206354717 13.922 13.91 13.307 13.199 12.593 ~ 35 0
9 Cl* NGC 2682 SAND 819 RS* 08 50 54.9862572848 +11 56 50.269982215 17.667 16.92 15.905     ~ 33 0
10 [MS2015] NX 59 QSO 08 50 56.479 +11 37 32.88     22.31     ~ 1 0
11 [BVM98] M 67 24 X 08 50 56.50 +11 45 23.3   20.61 20.27     ~ 2 0
12 [BVM98] M 67 15 AGN 08 50 57.104 +11 46 07.57   24.63 23.27     ~ 3 0
13 [BVM98] M 67 36 X 08 50 57.55 +11 52 55.2           ~ 3 0
14 Cl* NGC 2682 SAND 764 SB* 08 50 58.4522085072 +11 48 06.688177308 17.234 16.6 15.529   14.740 ~ 18 0
15 LB 3597 QSO 08 50 58.8449408328 +11 51 38.476080612 20.567 20.54 20.301     ~ 23 0
16 NGC 2682 51 SB* 08 51 01.5495469560 +11 49 34.326309756 13.485 13.22 12.57 12.54 11.976 G0IV 33 0
17 Cl* NGC 2682 ES IV-61 * 08 51 01.5612054240 +11 49 27.228376272 15.854 15.48 14.877   13.856 ~ 9 0
18 RX J085104+11462 X 08 51 03.818 +11 46 30.15   21.57 21.21     ~ 6 0
19 [BVM98] M 67 54 * 08 51 04.43 +11 41 51.6   21.02 19.36     ~ 2 0
20 [MS2015] NX 43 X 08 51 04.66 +11 42 19.3           ~ 1 0
21 [BVM98] M 67 34 G 08 51 04.69 +11 55 29.7   22.80 21.99     ~ 3 0
22 Cl* NGC 2682 SAND 757 EB* 08 51 04.8272787384 +11 45 56.881089612 14.331 14.216 13.541   12.841 ~ 56 0
23 LB 3598 QSO 08 51 06.2141744064 +11 37 54.237109944 20.481 20.961 20.635   19.847 ~ 4 0
24 Cl* NGC 2682 FBC 3011 * 08 51 06.3696114552 +11 54 18.817683984   19.874 18.361   16.217 ~ 15 0
25 Cl* NGC 2682 SAND 1077 SB* 08 51 07.2254409816 +11 53 01.951858464 13.382 13.24 12.595   11.752 F4 53 0
26 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 ~ 25 0
27 [VTB2004] CX 39 G 08 51 08.95 +11 50 43.5   22.02 20.62     ~ 2 0
28 Cl* NGC 2682 FBC 3165 * 08 51 11.4094842144 +11 47 11.017823604   19.953 18.450   16.311 ~ 12 0
29 [MS2015] NX 40 X 08 51 11.60 +11 50 29.5           ~ 1 0
30 Cl* NGC 2682 SAND 1063 RS* 08 51 13.3549065744 +11 51 40.172654052 15.557 14.84 13.573   12.591 G8IV 62 0
31 [MS2015] NX 46 X 08 51 16.99 +11 48 22.8           ~ 1 0
32 Cl* NGC 2682 FBC 3348 * 08 51 17.0529379176 +11 48 26.807464440   18.804 17.410   15.793 ~ 14 0
33 Cl* NGC 2682 ES I-50 SB* 08 51 17.7224075472 +11 44 29.561572500 16.629 16.26 15.347   14.281 ~ 31 0
34 Cl* NGC 2682 SAND 986 SB* 08 51 17.9917758696 +11 45 54.232467732 13.363 13.28 12.733   12.04 ~ 84 0
35 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 47 0
36 Cl* NGC 2682 SAND 999 RS* 08 51 18.6870620808 +11 47 02.715891216 13.632 13.38 12.569 12.143 11.69 ~ 97 0
37 NGC 2682 119 RS* 08 51 19.0167198768 +11 50 05.755781940 13.197 13.13 12.547 12.177 11.837 F9IV 88 0
38 NGC 2682 120 RS* 08 51 19.1814084740 +11 47 54.691660489 14.248 14.23 13.707 13.307 12.968 F9V 44 0
39 Cl* NGC 2682 SAND 1070 RS* 08 51 19.6901093120 +11 52 10.753229665 14.643 14.52 13.939   13.156 G1V 47 0
40 NGC 2682 124 BS* 08 51 19.9070240880 +11 47 00.441178944 12.576 12.59 12.117 11.848 11.564 F5IV 90 0
41 [BVM98] M 67 23 X 08 51 20.6 +11 48 43           ~ 2 0
42 NGC 2682 131 SB* 08 51 20.794032 +11 53 26.13120   11.647 11.248 11.042 10.722 F5IV 128 0
43 NGC 2682 136 SB* 08 51 21.7535381400 +11 52 37.872333372   11.92 11.235   10.595 F8V 84 0
44 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 34 0
45 Cl* NGC 2682 FBC 3559 * 08 51 23.4677209704 +11 44 46.197378132 20.860 19.963 18.431   16.428 ~ 12 0
46 NGC 2682 OpC 08 51 23.5 +11 48 54           ~ 2528 0
47 NGC 2682 143 SB* 08 51 23.7746734704 +11 49 49.338989364   12.39 11.420   10.61 G4III 105 0
48 Cl* NGC 2682 SAND 1112 RS* 08 51 24.1103539344 +12 01 30.643631940   15.76 15.043     G6V 19 0
49 NGC 2682 147 RS* 08 51 24.9497688840 +11 49 00.800179176 13.897 13.84 13.282 12.906 12.545 G0V 31 0
50 [MS2015] NX 68 X 08 51 25.06 +11 57 48.4           ~ 1 0
51 Cl* NGC 2682 SAND 1113 RS* 08 51 25.3043953560 +12 02 56.494997844 15.299 14.78 13.736     ~ 71 0
52 [MS2015] NX 67 AG? 08 51 25.87 +11 59 33.2           ~ 1 0
53 [MS2015] NX 69 X 08 51 26.29 +11 37 06.3           ~ 1 0
54 V* ET Cnc EB* 08 51 26.7153102238 +11 56 12.173349613 17.711 16.98 15.850     ~ 38 0
55 [BVM98] M 67 32 AGN 08 51 27.129 +11 55 24.97   25.82 23.46     ~ 3 0
56 [MS2015] NX 44 G 08 51 27.13 +11 45 02.4     22.83     ~ 1 0
57 V* EU Cnc CV* 08 51 27.1835851536 +11 46 56.996141700   21.93 21.75     ~ 46 0
58 Cl* NGC 2682 SAND 1036 EB* 08 51 28.1469477144 +11 49 27.495860592 13.262 13.27 12.809   12.184 F3 84 0
59 [VTB2004] CX 12 X 08 51 28.356 +11 41 28.28   22.52 22.40     ~ 3 0
60 [VTB2004] CX 41 X 08 51 28.90 +11 48 07.4           ~ 2 0
61 [MS2015] NX 41 AGN 08 51 30.47 +11 33 39.8   22.07 22.07     ~ 1 0
62 [VTB2004] CX 29 X 08 51 30.58 +11 50 44.8           ~ 2 0
63 NGC 2682 176 SB* 08 51 31.2372498181 +11 45 50.657346109 13.242 13.22 12.624 12.312 11.950 F8 53 0
64 Cl* NGC 2682 FBC 3814 * 08 51 31.5495427392 +11 50 32.320065120           ~ 7 0
65 Cl* NGC 2682 ES II-229 * 08 51 32.6283944712 +11 45 59.838259392   20.912 19.265 18.762 17.024 ~ 9 0
66 Cl* NGC 2682 EIS 2593 * 08 51 33.02 +11 34 11.9   21.59 21.03     ~ 2 0
67 NGC 2682 188 BS* 08 51 34.2565152264 +11 50 54.499637148 14.277 14.27 13.774 13.389 13.028 F8V 28 0
68 V* EY Cnc Ro* 08 51 35.1509860296 +11 50 31.585825032   21.434 19.851 17.9 18.365 ~ 7 0
69 Cl* NGC 2682 SAND 1203 SB* 08 51 35.5401707784 +11 39 46.985666436 15.252 15.12 14.415   13.504 G4V 22 0
70 [BVM98] M 67 48 G 08 51 35.70 +11 48 00.9   22.72 22.38     ~ 3 0
71 NGC 2682 195 SB* 08 51 36.0102891818 +11 46 33.602537041 13.539 13.4 12.682 12.328 11.915 G0 64 0
72 [VTB2004] CX 40 X 08 51 36.20 +11 44 46.0           ~ 2 0
73 NGC 2682 200 * 08 51 37.1607693888 +11 59 02.503934952   11.95 10.915   10.248 G8 23 0
74 Cl* NGC 2682 SAND 1282 SB* 08 51 37.8473566296 +11 50 57.092451072 13.964 13.89 13.333   12.634 F7V 181 0
75 2XMM J085138.4+114906 G 08 51 38.390 +11 49 06.07   20.94 20.79     ~ 4 0
76 [VTB2004] CX 71 X 08 51 38.52 +11 54 12.3   21.99 21.42     ~ 2 0
77 [MS2015] NX 61 X 08 51 38.72 +11 58 21.3           ~ 1 0
78 [MS2015] NX 65 AGN 08 51 42.75 +11 34 08.8           ~ 1 0
79 [VTB2004] CX 129 X 08 51 43.09 +11 51 05.4           ~ 2 0
80 [VTB2004] CX 73 X 08 51 43.13 +11 40 00.1           ~ 2 0
81 [VTB2004] CX 70 G 08 51 44.05 +11 48 49.7   22.82 22.79     ~ 2 0
82 [VTB2004] CX 22 G 08 51 46.16 +11 49 50.3   23.32 22.12     ~ 2 0
83 Cl* NGC 2682 EIS 600 QSO 08 51 46.5697284720 +11 52 02.761924620   20.92 20.74     ~ 4 0
84 [MS2015] NX 60 X 08 51 47.73 +11 39 54.6           ~ 1 0
85 NGC 2682 241 * 08 51 49.1427101712 +11 49 43.607392284 13.385 13.31 12.759   12.025 F8IV 37 0
86 LB 6378 QSO 08 51 49.9413614904 +11 49 52.279783788   20.77 20.64     ~ 14 0
87 NGC 2682 244 RG* 08 51 50.2026472872 +11 46 06.919342284   11.72 10.700   9.820 G8III 104 0
88 2XMM J085151.3+113549 QSO 08 51 51.4015997424 +11 35 48.872465484   21.65 20.99     ~ 3 0
89 [MS2015] NX 38 X 08 51 52.93 +11 36 54.7   22.76 21.91     ~ 1 0
90 Cl* NGC 2682 SAND 1439 SB* 08 51 57.8686525272 +11 45 45.965615364 16.905 16.38 15.472   14.395 K1 20 0
91 [MS2015] NX 57 X 08 52 05.18 +11 50 42.9           ~ 1 0
92 [MS2015] NX 71 X 08 52 06.51 +11 53 24.4           ~ 1 0
93 Cl* NGC 2682 EIS 2952 WD? 08 52 07.3429042776 +11 52 07.354271892   22.07 21.30     ~ 2 0
94 Cl* NGC 2682 EIS 2018 QSO 08 52 07.47 +11 41 14.5   21.67 21.52     ~ 4 0
95 Cl* NGC 2682 FBC 4858 * 08 52 10.0481008656 +11 55 28.994377188 19.830 18.983 17.358     ~ 6 0
96 [MS2015] NX 28 G 08 52 10.42 +11 47 12.7   22.18 22.08     ~ 1 0
97 [VTB2004] CX 80 X 08 52 12.80 +11 49 49.6           ~ 2 0
98 [BVM98] M 67 51 X 08 52 13.52 +11 46 21.1   22.45 21.95     ~ 2 0
99 Cl* NGC 2682 SAND 1601 EB* 08 52 16.8391686288 +11 48 31.249877400   15.45 14.651   13.33 ~ 23 0
100 Cl* NGC 2682 FBC 5023 Ro* 08 52 17.0383800336 +11 41 09.065716296 19.661 18.595 16.919   14.255 ~ 12 0
101 NGC 6633 OpC 18 27 30.2 +06 38 21           ~ 423 0
102 IC 4756 OpC 18 38 39.0 +05 26 14           ~ 274 0
103 NGC 6791 OpC 19 20 52.8 +37 46 40   10.52 9.5     ~ 1120 0

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