2007A&A...471..515D

Query : 2007A&A...471..515D

2007A&A...471..515D - Astronomy and Astrophysics, volume 471, 515-526 (2007/8-4)

Variable stars in the open cluster NGC 6791 and its surrounding field.

DE MARCHI F., PORETTI E., MONTALTO M., PIOTTO G., DESIDERA S., BEDIN L.R., CLAUDI R., ARELLANO FERRO A., BRUNTT H. and STETSON P.B.

Abstract (from CDS):

This work presents a high-precision variability survey in the field of the old, super metal-rich open cluster NGC 6791. The data sample consists of more than 75000 high-precision CCD time series measurements in the V band obtained mainly at the Canada-France-Hawaii Telescope, with additional data from S. Pedro Martir and Loiano observatories, over a time span of ten nights. The field covers an area of 42x28 arcmin2. We have discovered 260 new variables and re-determined periods and amplitudes of 70 known variable stars. By means of a photometric evaluation of the membership in NGC 6791, and a preliminary membership based on the proper motions, we give a full description of the variable content of the cluster and surrounding field in the range 16≲V<23.5. Accurate periods can be given for the variables with P≲4.0d, while for ones with longer periods the limited time-baseline hampered precise determinations. We categorized the entire sample as follows: 6 pulsating, 3 irregular, 3 cataclysmic, 89 rotational variables and 61 eclipsing systems; moreover, we detected 168 candidate variables for which we cannot give a variability class since their periods are much longer than our time baseline. On the basis of photometric considerations, and of the positions of the stars with respect to the center of the cluster, we inferred that 11 new variable stars are likely members of the cluster, for 22 stars the membership is doubtful and 137 are likely non-members. We also detected an outburst of about 3mag in the light curve of a very faint blue star belonging to the cluster and we suggest that this star could be a new U Gem (dwarf nova) cataclysmic variable.

Abstract Copyright: ∼

Journal keyword(s): stars: starspots - stars: statistics - stars: variables: general - stars: binaries: eclipsing - stars: novae, cataclysmic variables - open clusters and associations: individual: NGC 6791

VizieR on-line data: <Available at CDS (J/A+A/471/515): table.dat lc/*>

Nomenclature: Catalog: [DPM2007] NNNNN-NN N=260.

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

CDS comments: Paragraph 4.3 NGC 6971 is a probable misprint for NGC 6791. Paragraph 4.1 00122_4 is a probable misprint for 01122_4. Paragraph 4.6 001606_1 is a probable misprint for 01606_11.

Simbad objects: 127

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Number of rows : 127
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 3914 0
2 NGC 2682 OpC 08 51 23.0 +11 48 50           ~ 2342 0
3 Cl* NGC 6791 KR V102 EB* 19 19 31.0 +37 32 16     19.314 18.911   ~ 2 0
4 Cl* NGC 6791 KR V44 BY* 19 19 37.0967590560 +37 41 41.374808664     18.410 17.782   ~ 4 0
5 Cl* NGC 6791 KR V40 BY* 19 19 38.9878926648 +37 37 00.786330372     19.748 19.033   ~ 3 0
6 Cl* NGC 6791 KR V47 BY* 19 19 39.1143576528 +37 32 10.531567896     19.978 18.737   ~ 3 0
7 V* V681 Lyr LP? 19 19 40.0009524120 +37 29 44.815947540     17.058 16.317   ~ 3 0
8 Cl* NGC 6791 KR V25 EB* 19 19 42.3371422584 +37 42 47.863140552     18.554 17.852   ~ 3 0
9 Cl* NGC 6791 KR V61 EB* 19 19 42.9 +37 29 07     16.888 16.314   ~ 3 0
10 Cl* NGC 6791 KR V30 EB* 19 19 43.0097129352 +37 30 06.722417556     16.074 15.746   ~ 4 0
11 Cl* NGC 6791 KR V28 EB* 19 19 43.8015088920 +37 35 29.972320008     17.467 16.948   ~ 4 0
12 Cl* NGC 6791 KR V115 V* 19 19 50.29 +37 58 32.9     20.70     ~ 2 0
13 Cl* NGC 6791 KR V36 EB* 19 19 56.42 +37 34 12.5     16.323 15.517   ~ 3 0
14 Cl* NGC 6791 KR V24 EB* 19 19 58.4866385112 +37 35 43.804144572     19.001 18.282   ~ 3 0
15 Cl* NGC 6791 KR V114 V* 19 20 00.0004627800 +37 48 44.492505516     17.601 16.882   ~ 2 0
16 Cl* NGC 6791 KR V112 V* 19 20 04.1687080632 +37 48 33.180395472     15.467 14.947   ~ 2 0
17 Cl* NGC 6791 KR V34 EB* 19 20 09.1577107128 +37 44 10.491755820     19.201 18.410 17.91 ~ 3 0
18 Cl* NGC 6791 KR V116 V* 19 20 10.22 +37 43 12.2           ~ 3 0
19 Cl* NGC 6791 KR V27 EB* 19 20 10.6524770616 +37 38 56.285481408   19.29 18.549 17.985 17.18 ~ 3 0
20 Cl* NGC 6791 KR V22 EB* 19 20 18.6850141296 +37 30 29.548137348     19.654 18.917   ~ 3 0
21 Cl* NGC 6791 KR V23 EB* 19 20 19.152936 +37 47 16.85508     16.856 16.196 15.69 ~ 13 0
22 Cl* NGC 6791 KR V59 Ro* 19 20 21.4862218392 +37 48 21.599087328     17.781 17.221   ~ 10 0
23 V* V513 Lyr EB* 19 20 24.9782041728 +37 49 18.554404440   18.634     16.81 ~ 13 0
24 Cl* NGC 6791 KR V32 EB* 19 20 27.6 +37 47 14   20.250 19.334 18.760   ~ 4 0
25 [TGM2014] 33022 V* 19 20 30.8829427032 +37 36 50.939429544     15.802 15.266   ~ 4 0
26 V* V514 Lyr EB* 19 20 30.9623841984 +37 51 56.653723332   18.6 17.81   16.93 ~ 7 0
27 V* V696 Lyr LP* 19 20 32.1911910960 +37 44 20.846910012   16.330 14.722   10.790 ~ 20 0
28 V* V515 Lyr EB* 19 20 33.2921313572 +37 48 16.366712433   20.386 19.449 18.843 18.16 ~ 9 0
29 Cl* NGC 6791 KR V109 EB* 19 20 33.8 +37 47 37   22.19 20.73 19.766 19.13 ~ 2 0
30 Cl* NGC 6791 KR V113 V* 19 20 34.8505270992 +37 48 14.586978168     17.568 16.995   ~ 6 0
31 Cl* NGC 6791 KR V50 V* 19 20 35.2061834232 +37 31 04.105715520     16.544 16.055   ~ 3 0
32 Cl* NGC 6791 KR V103 EB* 19 20 35.6 +37 35 45       20.856   ~ 2 0
33 V* V516 Lyr CV* 19 20 35.7418540680 +37 44 52.043756748 19.92 21.07       ~ 34 0
34 Cl* NGC 6791 KR V117 EB* 19 20 36.3505975512 +37 39 56.764740096         16.76 ~ 9 0
35 V* V598 Lyr BY* 19 20 38.8882974240 +37 49 04.308135780   19.172 17.949 17.279 16.64 ~ 17 0
36 Cl* NGC 6791 KR V105 EB* 19 20 39.1 +37 33 36     20.412 20.048   ~ 2 0
37 Cl* NGC 6791 KR V43 BY* 19 20 39.5769065088 +37 38 30.393998808   21.2 19.58 18.186 16.61 ~ 3 0
38 Cl* NGC 6791 KR V82 Ro* 19 20 39.7147231032 +37 47 35.863716264   20.01 19.064 18.522 17.99 ~ 5 0
39 V* V564 Lyr Ro* 19 20 39.8133971280 +37 43 54.192022860   17.322 16.224 15.522   ~ 14 0
40 V* V602 Lyr Ro* 19 20 42.5008164768 +37 44 36.662746092   18.42 17.563 17.023 16.62 ~ 8 0
41 V* V517 Lyr EB* 19 20 42.9275119224 +37 50 56.252364468   18.528 17.499 16.931   ~ 24 0
42 Cl* NGC 6791 KR V95 Ro* 19 20 43.0543424112 +37 47 32.283501864   20.19 19.147 18.509 18.06 ~ 5 0
43 Cl* NGC 6791 KR V104 EB* 19 20 43.3111747728 +37 34 40.401612480     19.675 18.538   ~ 2 0
44 Cl* NGC 6791 KR V35 EB* 19 20 44.0566012848 +37 30 42.537123684     17.139 16.628   ~ 3 0
45 Cl* NGC 6791 KR V26 EB* 19 20 44.8942073976 +37 33 42.383752164     17.332 16.798   ~ 3 0
46 V* V604 Lyr Ro* 19 20 45.2601302352 +37 45 48.649883292   17.989 17.081 16.518 16.04 ~ 13 0
47 Cl* NGC 6791 KR V45 Ro* 19 20 46.0474119696 +37 42 05.722017516   17.964 17.083 16.463   ~ 4 0
48 Cl* NGC 6791 KR V83 Ro* 19 20 46.3970791584 +37 44 13.890582816   20.12 19.392 18.683 18.05 ~ 4 0
49 V* V518 Lyr EB* 19 20 46.5295641144 +37 48 47.640580776   18.062 17.193 16.669 16.24 ~ 17 0
50 V* V519 Lyr EB* 19 20 47.6043469800 +37 44 31.821120744   17.026 16.241 15.718   ~ 27 0
51 V* V606 Lyr El* 19 20 47.71 +37 44 58.2     19.836 18.989   ~ 4 0
52 V* V520 Lyr EB* 19 20 47.8810977888 +37 46 37.198197084   18.391 17.219 16.458 15.77 ~ 29 0
53 Cl* NGC 6791 KR V75 Ro* 19 20 47.9448696792 +37 45 58.609433124     17.374 16.829 16.40 ~ 7 0
54 Cl* NGC 6791 KR V111 Ro* 19 20 49.1 +37 48 44   22.13 20.555 19.672 19.01 ~ 2 0
55 V* V607 Lyr Ro* 19 20 49.1704882392 +37 49 14.556438084     16.517 15.813   K0 11 0
56 V* V565 Lyr EB* 19 20 49.3769291736 +37 46 09.059900844   18.612 17.658 17.197   ~ 40 0
57 V* V608 Lyr El* 19 20 49.6550529816 +37 48 08.519476032     16.905 16.373   ~ 8 0
58 NGC 6791 3012 RG* 19 20 49.7230010696 +37 43 42.757322450   15.68 13.96   10.95 ~ 41 0
59 V* V609 Lyr EB* 19 20 49.86 +37 45 50.9     18.27     ~ 4 0
60 Cl* NGC 6791 KR V76 V* 19 20 49.9 +37 45 51   19.22 18.270 17.585 17.04 ~ 4 0
61 Cl* NGC 6791 KR V86 Ro* 19 20 50.1278359848 +37 48 31.501685592   20.50 19.478 18.846 18.30 ~ 5 0
62 V* V611 Lyr BY* 19 20 50.9663833670 +37 48 24.602655144     19.072 18.359   ~ 6 0
63 Cl* NGC 6791 KR V118 EB* 19 20 51.00 +37 39 03.9   18.43 17.68   16.67 ~ 2 0
64 V* V612 Lyr El* 19 20 51.6624999408 +37 45 24.570141876   19.540   18.065 17.53 ~ 8 0
65 V* V566 Lyr Ro* 19 20 52.3517903304 +37 45 50.652968796   16.715       ~ 16 0
66 V* V613 Lyr El* 19 20 52.4664983376 +37 47 30.303263364   17.256 16.272 15.645   ~ 15 0
67 V* V614 Lyr Ro* 19 20 52.7716572696 +37 44 58.605335232   19.03 18.189 17.637 17.19 ~ 8 0
68 V* V615 Lyr El* 19 20 52.9040017704 +37 46 36.698363904     16.67 16.206   ~ 11 0
69 V* V616 Lyr Ro* 19 20 52.9621453200 +37 46 52.294552716   15.728 14.84     G9II 18 0
70 NGC 6791 OpC 19 20 53.0 +37 46 41   10.52 9.5     ~ 1040 0
71 V* V521 Lyr EB* 19 20 54.2212145040 +37 48 23.603257836   18.689 17.771 17.170   ~ 17 0
72 V* V567 Lyr EB* 19 20 54.280 +37 45 34.73   18.400       ~ 19 0
73 V* V617 Lyr EB* 19 20 55.2080812656 +37 46 39.524160144     18.631 18.034   ~ 13 0
74 V* V619 Lyr El* 19 20 56.45 +37 45 38.5     17.87 16.418   ~ 4 0
75 V* V620 Lyr EB* 19 20 56.64 +37 46 36.2   19.63 19.078 18.226 17.55 ~ 5 0
76 V* V621 Lyr Pu* 19 20 57.0591244560 +37 48 11.941717932     17.527 16.866   G8 10 0
77 V* V568 Lyr EB* 19 20 57.3346763352 +37 45 36.739962972   18.295   16.823   ~ 43 0
78 Cl* NGC 6791 KR V57 Ro* 19 20 57.8931296400 +37 31 06.769290000     18.359 17.460   ~ 3 0
79 V* V622 Lyr Ro* 19 20 58.8553987416 +37 44 46.940255124   18.97 18.159 17.608 17.17 ~ 7 0
80 Cl* NGC 6791 KR V42 BY* 19 21 00.2020875840 +37 42 53.227785420   20.679   18.954 18.35 ~ 4 0
81 Cl* NGC 6791 KR V39 Ro* 19 21 00.4662856680 +37 38 22.552483956     16.678 15.956   ~ 8 0
82 Cl* NGC 6791 KR V91 Ro* 19 21 00.5372344440 +37 48 40.465946664     18.097 17.611   ~ 6 0
83 V* V624 Lyr EB* 19 21 00.6897752344 +37 45 44.841437480   19.576 18.697 18.083   ~ 8 0
84 V* V625 Lyr BY* 19 21 00.8297295816 +37 44 35.209666824     18.803 18.257 17.79 ~ 7 0
85 V* V626 Lyr El* 19 21 01.8067544016 +37 45 41.753363832     17.151 16.544   ~ 8 0
86 V* V627 Lyr El* 19 21 02.4630101016 +37 47 09.060968436 16.80 17.73 17.125 16.565 16.10 ~ 25 1
87 Cl* NGC 6791 KR V6 EB* 19 21 02.705088 +37 48 48.65328     15.430 15.28   ~ 25 0
88 Cl* NGC 6791 KR V92 Ro* 19 21 02.7209332944 +37 46 00.599128500   19.01 18.30     ~ 4 0
89 Cl* NGC 6791 KR V62 Ro* 19 21 03.0502853184 +37 43 51.556783692     19.189 18.618   ~ 6 0
90 V* V630 Lyr LP* 19 21 03.6693642648 +37 48 03.468090132   18.170 16.959 16.180   ~ 10 0
91 V* V631 Lyr EB* 19 21 03.69 +37 46 05.9   19.732 18.833 18.195   ~ 7 0
92 V* V632 Lyr El* 19 21 05.404248 +37 47 08.70900   19.10 16.925 16.473 17.09 ~ 5 0
93 Cl* NGC 6791 KR V101 EB* 19 21 05.6 +37 38 25   20.50 19.925 19.483   ~ 2 0
94 Cl* NGC 6791 KR V110 V* 19 21 05.7736399571 +37 44 30.229510864     17.828 17.342   ~ 5 0
95 Cl* NGC 6791 SBG 12390 EB* 19 21 06.4750041288 +37 47 27.625816644   18.84 17.89 17.142   ~ 20 0
96 Cl* NGC 6791 KR V119 EB* 19 21 07.0666927152 +37 54 59.007005892     18.15   16.82 ~ 2 0
97 Cl* NGC 6791 KR V74 V* 19 21 07.2 +37 44 21   15.921 14.660     ~ 3 0
98 V* V523 Lyr CV* 19 21 07.3950071424 +37 47 56.271903940 17.70         ~ 32 0
99 Cl* NGC 6791 KR V48 Ro* 19 21 07.4740332600 +37 43 06.370506876     17.558 17.003   ~ 8 0
100 V* V634 Lyr El* 19 21 07.5828785160 +37 48 09.375343704   18.707 17.850 17.276 16.78 ~ 11 0
101 Cl* NGC 6791 KR V66 Ro* 19 21 08.4180376416 +37 44 55.016599164   17.174 16.119 15.372   ~ 13 0
102 Cl* NGC 6791 KR V108 EB* 19 21 09.4 +37 49 25   22.42 21.15 20.117 19.25 ~ 2 0
103 V* V710 Lyr LP* 19 21 10.4820614688 +37 43 24.565707732   18.433 17.291 16.563   ~ 7 0
104 Cl* NGC 6791 KR V120 V* 19 21 10.54 +37 40 22.3           ~ 2 0
105 Cl* NGC 6791 SBG 13421 gD* 19 21 10.7050311216 +37 45 31.420916964     15.685 15.389   ~ 22 0
106 V* V711 Lyr LP* 19 21 11.4378148320 +37 29 55.149559116     16.473 15.882   ~ 3 0
107 V* V524 Lyr EB* 19 21 11.8 +37 47 58   20.469 19.642 18.922   ~ 7 0
108 Cl* NGC 6791 KR V51 BY* 19 21 12.1632612528 +37 44 54.543822756     19.971 19.257 18.73 ~ 4 0
109 Cl* NGC 6791 KU B4 HS* 19 21 12.8916906768 +37 45 51.138205956 16.73 17.69 17.873 17.910 18.02 sdB 42 0
110 Cl* NGC 6791 KR V58 Ro* 19 21 14.5273680144 +37 48 04.232537532     17.544 17.028 16.58 ~ 8 0
111 V* V525 Lyr EB* 19 21 15.7519465680 +37 46 09.507743796   19.471 18.535 17.955 17.45 ~ 12 0
112 Cl* NGC 6791 KR V29 EB* 19 21 17.3 +37 45 05   20.971 20.046 19.083 18.39 ~ 4 0
113 V* V526 Lyr EB* 19 21 17.5 +37 46 00   20.672 19.537 19.074 17.84 ~ 9 0
114 Cl* NGC 6791 KR V37 EB* 19 21 18.2362870776 +37 51 06.752376684   20.905 19.535 18.353 17.10 ~ 4 0
115 KOI-3699 EB* 19 21 18.2385206904 +37 45 41.565324960     17.999 17.434 16.97 ~ 14 0
116 KOI-1003 RS* 19 21 18.6969974520 +37 43 36.184313172   17.461 16.524 15.929   G8IV-V 30 0
117 Cl* NGC 6791 KR V46 BY* 19 21 18.9777265056 +37 47 55.911318324     18.688 17.930 17.29 ~ 4 0
118 Cl* NGC 6791 KR V52 Ro* 19 21 20.8633729848 +37 46 19.011585360       17.016 16.61 ~ 8 0
119 Cl* NGC 6791 KR V55 Ro* 19 21 22.4080325784 +37 50 29.492542500           ~ 16 0
120 Cl* NGC 6791 KR V121 EB? 19 21 29.0285211312 +37 55 56.212076820         16.40 ~ 3 0
121 Cl* NGC 6791 KR V122 V* 19 21 38.5201363560 +37 38 29.006604060     20.92     ~ 2 0
122 Cl* NGC 6791 KR V123 dS* 19 21 43.46 +37 39 56.9   17.53 17.08     ~ 3 0
123 Cl* NGC 6791 KR V124 V* 19 21 54.4946959440 +37 40 53.448665772         16.55 ~ 3 0
124 Cl* NGC 6791 KR V72 V* ~ ~   25.925 15.111     ~ 2 0
125 Cl* NGC 6791 KR V78 V* ~ ~           ~ 2 0
126 Cl* NGC 6791 KR V69 V* ~ ~   15.357 13.844     ~ 2 0
127 Cl* NGC 6791 KR V68 V* ~ ~   14.786 14.211     ~ 2 0

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