2012ApJ...745...57G

Query : 2012ApJ...745...57G

2012ApJ...745...57G - Astrophys. J., 745, 57 (2012/January-3)

An unexpected discovery in the rich open cluster NGC 6819 using XMM-Newton.

GOSNELL N.M., POOLEY D., GELLER A.M., KALIRAI J., MATHIEU R.D., FRINCHABOY P. and RAMIREZ-RUIZ E.

Abstract (from CDS):

We present the first study of the X-ray population of the intermediate-age rich open cluster NGC 6819 using the XMM-Newton Observatory. In the past decade, Chandra X-ray observations have shown a relationship between the X-ray population of globular clusters and their internal dynamics and encounter frequency. We investigate the role dynamics possibly play in the formation of X-ray sources in NGC 6819, and compare our results with known properties of field and globular cluster X-ray populations. We implement a multi-wavelength approach to studying the X-ray sources, utilizing X-ray and UV data from XMM observations along with the wealth of photometry and radial-velocity data from the WIYN Open Cluster Study and the CFHT Open Cluster Survey. Within the cluster half-light radius, we detect 12 X-ray sources down to a luminosity of 1030 erg/s for cluster members. The sources include a candidate quiescent low-mass X-ray binary (qLMXB), a candidate cataclysmic variable, and two active binary systems. The presence of a qLMXB in an open cluster is previously unexpected given the known relationships between luminous X-ray sources and encounter frequency in globular clusters, and most likely has a dynamical origin.

Abstract Copyright: ∼

Journal keyword(s): binaries: close - open clusters and associations: individual: NGC 6819 - X-rays: binaries

Nomenclature: Table 1: [GPG2012] XNN (Nos X1-X12).

Simbad objects: 76

goto Full paper

goto View the references in ADS

Number of rows : 76
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 NGC 2682 OpC 08 51 23.5 +11 48 54           ~ 2528 0
3 2XMM J085138.4+114906 G 08 51 38.390 +11 49 06.07   20.94 20.79     ~ 4 0
4 X Aql X-1 LXB 19 11 16.0571313336 +00 35 05.868232692           ~ 1186 1
5 XMMU J194013.1+401143 X 19 40 13.1 +40 11 43           ~ 1 0
6 XMMU J194021.4+401546 X 19 40 21.4 +40 15 46           ~ 1 0
7 XMMU J194030.8+400641 X 19 40 30.8 +40 06 41           ~ 1 0
8 XMMU J194034.9+401152 X 19 40 34.9 +40 11 52           ~ 1 0
9 2MASS J19403677+4011415 * 19 40 36.7583765232 +40 11 41.501267484     15.72   15.00 ~ 10 0
10 XMMU J194037.7+400421 X 19 40 37.7 +40 04 21           ~ 1 0
11 XMMU J194040.2+401611 X 19 40 40.2 +40 16 11           ~ 1 0
12 XMMU J194041.5+400745 X 19 40 41.5 +40 07 45   19.07 18.69     ~ 2 0
13 XMMU J194046.7+402153 X 19 40 46.7 +40 21 53           ~ 1 0
14 2MASS J19404886+4006165 SB* 19 40 48.8649303216 +40 06 16.518080340     16.42   15.62 ~ 10 0
15 XMMU J194050.1+401650 X 19 40 50.1 +40 16 50           ~ 1 0
16 XMMU J194052.9+400400 X 19 40 52.9 +40 04 00   23.31 21.73     ~ 2 0
17 XMMU J194053.4+401556 X 19 40 53.4 +40 15 56           ~ 1 0
18 XMMU J194054.2+401036 X 19 40 54.2 +40 10 36           ~ 1 0
19 XMMU J194055.4+401242 X 19 40 55.4 +40 12 42           ~ 1 0
20 XMMU J194056.2+401541 X 19 40 56.2 +40 15 41           ~ 1 0
21 XMMU J194057.1+395959 X 19 40 57.1 +39 59 59           ~ 1 0
22 XMMU J194057.3+402031 X 19 40 57.3 +40 20 31           ~ 1 0
23 XMMU J194100.2+400220 X 19 41 00.2 +40 02 20           ~ 1 0
24 XMMU J194101.7+400411 X 19 41 01.7 +40 04 11           ~ 1 0
25 XMMU J194104.8+400100 X 19 41 04.8 +40 01 00           ~ 1 0
26 XMMU J194105.5+401430 X 19 41 05.5 +40 14 30   18.63 16.98     ~ 2 0
27 [GPG2012] X8 X 19 41 06.340 +40 11 42.42           ~ 1 0
28 XMMU J194106.6+400753 X 19 41 06.6 +40 07 53   23.86 22.44     ~ 2 0
29 [GPG2012] X10 X 19 41 11.810 +40 10 43.01           ~ 1 0
30 XMMU J194113.0+400629 X 19 41 13.0 +40 06 29   22.82 21.33     ~ 2 0
31 Cl* NGC 6819 P 13 V* 19 41 13.2802435848 +40 12 49.648007376   14.47 13.06   10.23 ~ 14 0
32 [GPG2012] X7 X 19 41 13.860 +40 09 32.70           ~ 1 0
33 [GPG2012] X1 LX? 19 41 14.080 +40 14 05.60           ~ 4 0
34 2MASS J19411586+4017252 ** 19 41 15.870 +40 17 25.29   13.40 13.21   12.42 ~ 10 0
35 NGC 6819 OpC 19 41 18.3 +40 11 19   8.21 7.3     ~ 719 0
36 [GPG2012] X11 X 19 41 18.480 +40 14 15.95           ~ 1 0
37 XMMU J194121.1+400044 X 19 41 21.1 +40 00 44           ~ 2 0
38 XMMU J194121.9+402336 X 19 41 21.9 +40 23 36   18.32 17.56     ~ 2 0
39 UCAC4 652-075607 SB* 19 41 21.9905159934 +40 12 02.082326356   13.036 12.019 12.589 11.44 K1II 19 0
40 [GPG2012] X5 X 19 41 22.470 +40 13 06.34           ~ 2 0
41 [GPG2012] X3 X 19 41 25.410 +40 11 44.63           ~ 1 0
42 NGC 6819 355 EB* 19 41 25.8343232568 +40 12 22.444309872   16.50 15.71   14.80 ~ 13 0
43 [GPG2012] X12 X 19 41 26.640 +40 12 57.70           ~ 1 0
44 [GPG2012] X2 CV* 19 41 29.190 +40 11 23.83   21.9 21.40     ~ 2 0
45 XMMU J194130.0+400348 X 19 41 30.0 +40 03 48           ~ 1 0
46 XMMU J194131.3+402033 X 19 41 31.3 +40 20 33           ~ 1 0
47 ZTF J194132.67+400011.3 EB* 19 41 32.6735696232 +40 00 11.187949788   15.11 14.48   13.68 ~ 15 0
48 XMMU J194137.5+400523 X 19 41 37.5 +40 05 23           ~ 1 0
49 XMMU J194139.5+402141 X 19 41 39.5 +40 21 41           ~ 1 0
50 XMMU J194140.1+400029 X 19 41 40.1 +40 00 29   19.12 17.52     ~ 1 0
51 XMMU J194141.1+401522 X 19 41 41.1 +40 15 22   20.08 19.29     ~ 2 0
52 XMMU J194141.5+400658 X 19 41 41.5 +40 06 58   20.60 20.08     ~ 2 0
53 XMMU J194143.4+401600 X 19 41 43.4 +40 16 00           ~ 1 0
54 2MASS J19414544+4008099 * 19 41 45.4477606128 +40 08 09.827149128     12.52   11.81 ~ 14 0
55 XMMU J194146.6+401014 X 19 41 46.6 +40 10 14           ~ 1 0
56 XMMU J194147.0+401347 X 19 41 47.0 +40 13 47           ~ 1 0
57 XMMU J194149.9+400804 X 19 41 49.9 +40 08 04           ~ 1 0
58 XMMU J194153.0+401145 X 19 41 53.0 +40 11 45           ~ 1 0
59 XMMU J194153.5+401531 X 19 41 53.5 +40 15 31           ~ 1 0
60 XMMU J194155.3+400940 X 19 41 55.3 +40 09 40           ~ 1 0
61 XMMU J194156.2+401351 X 19 41 56.2 +40 13 51           ~ 1 0
62 HD 186307 dS* 19 41 57.6138527237 +40 15 15.006140359   6.39 6.22     A6V 83 0
63 XMMU J194200.0+401303 X 19 42 00.0 +40 13 03           ~ 1 0
64 XMMU J194200.0+401520 X 19 42 00.0 +40 15 20   18.10 16.58     ~ 2 0
65 XMMU J194200.2+400516 X 19 42 00.2 +40 05 16           ~ 1 0
66 XMMU J194200.3+402202 X 19 42 00.3 +40 22 02           ~ 1 0
67 XMMU J194202.4+400734 X 19 42 02.4 +40 07 34           ~ 1 0
68 XMMU J194205.7+402102 X 19 42 05.7 +40 21 02           ~ 1 0
69 XMMU J194206.7+401441 X 19 42 06.7 +40 14 41   19.69 18.14     ~ 2 0
70 XMMU J194209.0+401113 X 19 42 09.0 +40 11 13           ~ 1 0
71 XMMU J194209.9+401449 X 19 42 09.9 +40 14 49           ~ 1 0
72 HD 225447 gD* 19 42 12.6333322008 +40 17 45.907870236   9.286 9.173     A3IV-V 31 0
73 XMMU J194216.0+401046 X 19 42 16.0 +40 10 46   18.95 18.36     ~ 2 0
74 XMMU J194218.7+401544 X 19 42 18.7 +40 15 44           ~ 1 0
75 XMMU J194224.4+400929 X 19 42 24.4 +40 09 29           ~ 1 0
76 XMMU J194226.2+400934 X 19 42 26.2 +40 09 34           ~ 1 0

To bookmark this query, right click on this link: simbad:objects in 2012ApJ...745...57G and select 'bookmark this link' or equivalent in the popup menu