2005AJ....130.2824H

Query : 2005AJ....130.2824H

2005AJ....130.2824H - Astron. J., 130, 2824-2837 (2005/December-0)

Time-series ensemble photometry and the search for variable stars in the open cluster M11.

HARGIS J.R., SANDQUIST E.L. and BRADSTREET D.H.

Abstract (from CDS):

This work presents the first large-scale photometric variability survey of the intermediate-age (∼200 Myr) open cluster M11. Thirteen nights of data over two observing seasons were analyzed (using crowded field and ensemble photometry techniques) to obtain high relative precision photometry. In this study we focus on the detection of candidate member variable stars for follow-up studies. A total of 39 variable stars were detected and can be categorized as follows: one irregular (probably pulsating) variable, six δ Scuti variables, 14 detached eclipsing binary systems, 17 W UMa variables, and one unidentified/candidate variable. While previous proper-motion studies allow for cluster membership determination for the brightest stars, we find that membership determination is significantly hampered below V=15, R=15.5 by the large population of field stars overlapping the cluster main sequence. Of the brightest detected variables that have a high likelihood of cluster membership, we find five systems in which further work could help constrain theoretical stellar models, including one potential W UMa member of this young cluster.

Abstract Copyright: ∼

Journal keyword(s): Stars: Binaries: Eclipsing - Stars: Variables: δ Scuti - open clusters and associations: individual (M11)

Nomenclature: Table 2: Cl* NGC 6705 HSB NNNN N=39 among N=8641.

Simbad objects: 50

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Number of rows : 50
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 NSV 24615 V* 08 51 08.0 -06 16 45           ~ 1 0
2 Cl* NGC 6705 HV 23 EB* 18 50 32.3131577320 -06 19 53.319295231     19.408     ~ 3 0
3 NGC 6705 1917 EB* 18 50 33.3744112920 -06 21 19.236817275   16.42 15.72     ~ 5 0
4 Cl* NGC 6705 HV 21 EB* 18 50 33.4272010052 -06 21 47.440620485   20.068 18.670     ~ 3 0
5 Cl* NGC 6705 HV 17 EB* 18 50 35.20 -06 18 41.3     18.263     ~ 4 0
6 Cl* NGC 6705 HV 32 EB* 18 50 36.3331869316 -06 12 24.132182423   19.187 17.962     ~ 3 0
7 Cl* NGC 6705 HV 12 EB* 18 50 37.6488991517 -06 16 19.137320903     17.216     ~ 5 0
8 Cl* NGC 6705 HV 22 EB* 18 50 38.1 -06 19 54   20.173 19.221     ~ 2 0
9 NSV 11402 LP* 18 50 38.9172052361 -06 13 12.569423903   16.182 14.168     M6 9 0
10 Cl* NGC 6705 HV 13 EB* 18 50 41.0312713248 -06 21 53.024394996   18.890 17.305     ~ 5 0
11 Cl* NGC 6705 HV 20 EB* 18 50 41.4776260215 -06 12 07.703168636   19.820 18.411     ~ 3 0
12 Cl* NGC 6705 HV 36 EB* 18 50 41.8801120268 -06 22 56.819787740   17.466 16.547     ~ 14 0
13 Cl* NGC 6705 HV 37 EB* 18 50 42.4 -06 17 18   19.643 18.062     ~ 2 0
14 NGC 6705 1715 EB* 18 50 43.4157085512 -06 13 17.984897184   15.854 15.237     ~ 3 0
15 NGC 6705 1711 dS* 18 50 43.6082440320 -06 19 47.591276052   14.73 13.95 13.81   ~ 8 0
16 Cl* NGC 6705 HV 19 EB* 18 50 43.6307528762 -06 23 29.013027872   19.525 18.281     ~ 3 0
17 ZTF J185048.66-061134.8 EB* 18 50 48.66 -06 11 34.8   20.159 18.279     ~ 4 0
18 NGC 6705 1596 EB* 18 50 49.0743998717 -06 14 49.983849902   15.80 15.26     ~ 6 0
19 NGC 6705 1531 dS* 18 50 52.3422148872 -06 15 59.002395372   14.79 14.31 14.03   ~ 9 0
20 NGC 6705 1521 RS* 18 50 52.4606948880 -06 10 07.492759392   15.532 14.754     ~ 6 0
21 Cl* NGC 6705 HV 30 EB* 18 50 59.3363178576 -06 22 05.176397388   18.249 17.060     ~ 9 0
22 Cl* NGC 6705 HV 10 EB* 18 50 59.3747846736 -06 13 43.397981364     16.900     ~ 5 0
23 NGC 6705 1258 EB* 18 50 59.7924568944 -06 11 38.716466424   14.28 13.55     ~ 3 0
24 NSV 11410 V* 18 50 59.9 -06 12 49           ~ 1 0
25 NGC 6705 1237 dS* 18 51 00.5375337672 -06 14 04.401889764   14.99 14.50     ~ 6 0
26 Cl* NGC 6705 HV 11 EB* 18 51 00.7384676517 -06 22 33.027766714   18.083 17.060     ~ 11 0
27 NGC 6705 1223 HB* 18 51 00.9214191672 -06 14 56.339489112   12.25 11.40     ~ 55 0
28 NGC 6705 OpC 18 51 03.7 -06 16 18   6.32 5.8     ~ 442 0
29 NGC 6705 1097 dS* 18 51 03.8776095077 -06 21 35.545386047   15.208 14.642     ~ 13 0
30 NGC 6705 926 SB* 18 51 07.5757202184 -06 16 27.648445404   12.365 11.370     ~ 21 0
31 HD 174512 MS? 18 51 07.9760513952 -06 16 45.047626104   9.055 8.557     A0II/III 36 0
32 Cl* NGC 6705 PPM 175 EB* 18 51 08.359 -06 15 56.20   15.74 15.16     ~ 3 0
33 V* IT Sct Mi* 18 51 09.1665191568 -06 08 21.924164184         11.430 ~ 7 0
34 ZTF J185109.20-061146.7 RS* 18 51 09.21 -06 11 46.8     19.614     ~ 4 0
35 Cl* NGC 6705 HV 25 EB* 18 51 10.1666142296 -06 12 50.560458995   19.900 19.732     ~ 5 0
36 NGC 6705 770 V* 18 51 11.3834757096 -06 16 15.735919152   14.230 13.699 13.653   ~ 12 0
37 Cl* NGC 6705 HV 16 EB* 18 51 14.18 -06 17 41.8   19.099 17.959     ~ 2 0
38 NGC 6705 683 V* 18 51 14.7621191664 -06 18 26.347430664           ~ 4 0
39 NGC 6705 676 * 18 51 15.0895380264 -06 15 43.817529024       13.81   ~ 4 0
40 Cl* NGC 6705 HSB 1938 EB* 18 51 16.4819139480 -06 11 47.253109884   17.398 16.408     ~ 2 0
41 V* V369 Sct dS* 18 51 16.8782664672 -06 21 11.161195200   9.76 9.35 9.39   K2III 38 0
42 Cl* NGC 6705 HV 26 EB* 18 51 16.96 -06 12 38.3   16.729 15.847     ~ 2 0
43 Cl* NGC 6705 HV 14 EB* 18 51 17.5785521402 -06 11 35.750401246   18.410 17.440     ~ 5 0
44 ZTF J185118.79-061322.2 RS* 18 51 18.80 -06 13 22.3     19.001     ~ 4 0
45 Cl* NGC 6705 HV 31 EB* 18 51 19.6485431323 -06 15 20.336255689   18.231 17.181     ~ 3 0
46 Cl* NGC 6705 HV 39 EB* 18 51 22.6 -06 21 02     19.163     ~ 2 0
47 Cl* NGC 6705 HV 38 EB* 18 51 23.0 -06 21 41     18.874     ~ 2 0
48 NGC 6705 482 ** 18 51 23.11 -06 20 49.6           ~ 5 0
49 Cl* NGC 6705 HV 15 EB* 18 51 23.9580986424 -06 10 48.130512708     17.933     ~ 5 0
50 V* BS Sct EB* 18 52 06.0392996016 -06 14 40.150001292   11.35 10.99     A7 23 0

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