2008BaltA..17...51M

Query : 2008BaltA..17...51M

2008BaltA..17...51M - Baltic Astronomy, 17, 51-65 (2008/April-0)

Photometric study of open clusters NGC 2266 and NGC 7762.

MACIEJEWSKI G., BOEVA S., GEORGIEV Ts., MIHOV B., OVCHAROV E., VALCHEVA A. and NIEDZIELSKI A.

Abstract (from CDS):

The results of photometric UBV monitoring of open clusters NGC 2266 and NGC 7762 are presented. 2MASS JH photometry is additionally used to determine the parameters of both clusters. For NGC 2266 the following parameters are obtained: the limiting radius 6.2 arcmin, log (age [yr]) = 9.08±0.04, metallicity Z = 0.004 ([Fe/H] = - 0.68), interstellar reddening EB–V = 0.17 and a distance of 2.80±0.15 kpc. No evidence for the existence of an extended corona was found. As a result of 45 hour monitoring of 7200 stars in the cluster field, 12 were found to be variable. All of them are located outside the cluster radius. For NGC 7762 the following parameters are obtained: limiting radius 23.5 arcmin (including an extended corona), log(age [yr]) = 9.38±0.04, interstellar reddening EB–V = 0.59 and a distance of 0.8±0.25 kpc; solar metallicity is accepted. The near-IR data suggest EJ–H = 0.11 and a peculiar interstellar reddening law. As a result of 55 hour monitoring of 5500 stars in the cluster field, 16 stars are found to be variable. Two of them, a short-period contact or semi-detached eclipsing system and a pulsating star of γ Dor type - are likely members of NGC 7762.

Abstract Copyright: ∼

Journal keyword(s): open clusters: stars: individual (NGC 2266, NGC 7762)

Nomenclature: Table 3: Cl* NGC 2266 MBG VNN (Nos V1-V12). Table 5: Cl* NGC 7762 MBG VNN (Nos V1-V16).

Simbad objects: 31

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Number of rows : 31
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 1817 OpC 05 12 33.4 +16 41 46           ~ 180 0
2 Cl* NGC 2266 MBG V1 V* 06 42 21.0 +26 42 34     16.38     ~ 1 0
3 Cl* NGC 2266 MBG V2 V* 06 42 51.9884675145 +27 22 56.225743519     15.64     ~ 2 0
4 Cl* NGC 2266 MBG V3 V* 06 43 02.0 +26 50 35     15.74     ~ 1 0
5 Cl* NGC 2266 MBG V4 V* 06 43 13.0 +27 14 32     15.75     ~ 1 0
6 NGC 2266 OpC 06 43 19.7 +26 58 34     9.5     ~ 76 0
7 Cl* NGC 2266 MBG V5 V* 06 43 34.0 +26 34 11     14.62     ~ 1 0
8 Cl* NGC 2266 MBG V6 V* 06 43 43.0 +26 31 27     16.17     ~ 1 0
9 Cl* NGC 2266 MBG V7 V* 06 43 55.0 +26 34 01     16.94     ~ 1 0
10 Cl* NGC 2266 MBG V8 V* 06 44 15.0 +27 30 25     15.35     ~ 1 0
11 Cl* NGC 2266 MBG V9 V* 06 44 30.9720804796 +26 40 19.900571331     14.29     ~ 2 0
12 Cl* NGC 2266 MBG V10 V* 06 44 36.3545850601 +27 11 27.521669579     16.94     ~ 2 0
13 Cl* NGC 2266 MBG V11 V* 06 44 55.0 +27 15 43     15.63     ~ 1 0
14 Cl* NGC 2266 MBG V12 V* 06 44 59.0 +26 59 02     15.69     ~ 1 0
15 Cl* NGC 7762 MBG V1 V* 23 47 25.0 +67 36 05   15.25 14.25     ~ 1 0
16 Cl* NGC 7762 MBG V2 Y*? 23 47 31.7485436986 +68 18 50.837666091   16.66 14.94     ~ 2 0
17 Cl* NGC 7762 MBG V3 V* 23 48 03.0 +68 04 13   16.89 15.70     ~ 1 0
18 Cl* NGC 7762 MBG V4 V* 23 48 04.0 +68 11 29   17.41 15.99     ~ 1 0
19 Cl* NGC 7762 MBG V5 V* 23 48 16.0 +67 22 29   15.72 14.59     ~ 1 0
20 Cl* NGC 7762 MBG V6 V* 23 48 48.1747761216 +67 46 28.639865748   18.68 17.27     ~ 1 0
21 Cl* NGC 7762 MBG V7 V* 23 49 10.0869095688 +68 02 29.437549620   18.98 17.76     ~ 1 0
22 Cl* NGC 7762 MBG V8 V* 23 49 18.0 +68 09 55   16.40 15.21     ~ 1 0
23 NGC 7762 OpC 23 49 53.3 +68 02 06           ~ 73 0
24 Cl* NGC 7762 MBG V9 V* 23 50 05.0 +68 02 04   14.82 13.60     ~ 1 0
25 Cl* NGC 7762 MBG V10 V* 23 50 19.0 +68 02 11   17.44 16.06     ~ 1 0
26 Cl* NGC 7762 MBG V11 V* 23 50 28.0 +68 24 09   15.63 14.57     ~ 1 0
27 Cl* NGC 7762 MBG V13 V* 23 50 54.0 +68 04 07   18.44 17.26     ~ 1 0
28 Cl* NGC 7762 MBG V14 V* 23 51 19.2254581992 +68 24 08.620600104   18.48 17.00     ~ 1 0
29 Cl* NGC 7762 MBG V15 V* 23 51 20.0 +67 45 06   18.42 17.09     ~ 1 0
30 Cl* NGC 7762 MBG V16 V* 23 53 15.0 +67 23 12   16.52 15.30     ~ 1 0
31 Cl* NGC 7762 MBG V12 V* ~ ~   14.78 13.90     ~ 1 0

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