2000AJ....119.1848D

Query : 2000AJ....119.1848D

2000AJ....119.1848D - Astron. J., 119, 1848-1854 (2000/April-0)

Search for pre-main-sequence stars in the young galactic cluster NGC 6910.

DELGADO A.J. and ALFARO E.J.

Abstract (from CDS):

Photometric CCD UBV measurements have been obtained in the field of the young Cygnus cluster NGC 6910. The observations reach down to magnitude V≃18 for 206 stars measured in all three UBV bands, uncovering the region of the color-magnitude diagram where pre-main-sequence (PMS) stars are expected. The transformation of our instrumental magnitudes to the standard system is discussed on the basis of two different sets of standard stars: 22 stars from six fields in the Landolt catalogs and 48 stars with published photoelectric photometry in common with ours in the four clusters observed in this campaign. The latter set is preferred, since it enables the effect of systematic errors in the U-B colors to be minimized. The adopted cluster parameters are E(B-V)=1.02±0.13, V0-MV=11.2±0.2, and age=(6.5±3)x106 yr. The search for PMS cluster members on the basis of the calculated color excess and distance modulus results in the proposed membership for 11 PMS stars of spectral types from A to G.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: Open Clusters and Associations: Individual: NGC Number: NGC 6910 - Stars: Pre-Main-Sequence

Nomenclature: Table 2, col(1): Cl* NGC 6910 DA NNNN N=50 among (Nos 22-3105).

Simbad objects: 56

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Number of rows : 56
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 IC 4996 OpC 20 16 32.7 +37 38 46           ~ 187 0
2 Ass Cyg OB 9 As* 20 21 +39.9           ~ 136 0
3 NGC 6910 28 * 20 22 58.4632931352 +40 46 13.651012848   13.00 12.27     F2 13 0
4 LS II +40 25 bC* 20 22 58.9399234608 +40 45 39.317337000   11.60 10.84     B1V 28 0
5 NGC 6910 51 * 20 23 02.0538116784 +40 46 16.743419724   15.11 14.27 14.07   ~ 7 0
6 NGC 6910 36 * 20 23 02.5786226952 +40 46 28.825240332 13.796 13.773 13.035   11.963 A 11 0
7 NGC 6910 52 * 20 23 03.8394459360 +40 46 34.765588668 15.286 15.018 14.158   12.943 ~ 7 0
8 Cl* NGC 6910 DA 419 * 20 23 05.1599242104 +40 44 19.677008004   14.81 13.83     ~ 5 0
9 LS III +40 12 bC* 20 23 07.5749623752 +40 46 08.882776740 11.058 11.239 10.412 18.755 9.355 B0.5V 31 0
10 BD+40 4146B Be* 20 23 09.8116404672 +40 45 52.256529216 13.603 13.542 12.625 12.030 11.397 B3Ve 11 0
11 BD+40 4146 * 20 23 10.4645410968 +40 45 52.325302104 10.331 10.485 9.670 9.44 8.529 B1 27 0
12 NGC 6910 34 * 20 23 10.6048494166 +40 46 22.109668439 13.664 13.638 12.775 12.171 11.568 ~ 15 0
13 HD 229196 Pu* 20 23 10.7840350992 +40 52 29.847533160 9.29 9.32 8.59     O6II(f) 123 0
14 Cl* NGC 6910 DA 22 * 20 23 12.0303970944 +40 47 44.569592556   15.12 14.30     ~ 5 0
15 NGC 6910 OpC 20 23 12.2 +40 46 16           ~ 202 0
16 Cl* NGC 6910 DA 132 * 20 23 13.2544561824 +40 47 25.421010972 16.328 15.785 14.798   13.384 ~ 6 0
17 BD+40 4148 SB* 20 23 14.5482525288 +40 45 19.094737320     10.307     O9.5:V 24 0
18 NGC 6910 21 * 20 23 16.5918230546 +40 48 01.941059210 12.390 12.510 11.788   10.724 B1V 17 0
19 NGC 6910 46 * 20 23 17.2691587488 +40 46 14.676218040 14.642 14.420 13.356   14.826 ~ 6 0
20 HD 194279 s*b 20 23 18.1647782064 +40 45 32.598481500 8.01 8.04 7.01 5.98 5.17 B2Ia 200 0
21 NGC 6910 24 * 20 23 18.6750137568 +40 48 38.229738372 12.406 12.523 11.716   10.573 B1V 15 0
22 NGC 6910 48 * 20 23 18.8667864000 +40 46 07.117235400 14.664 14.511 13.603   12.249 ~ 7 0
23 NGC 6910 38 * 20 23 20.2047587688 +40 48 26.686972692 13.795 13.749 12.936   11.754 ~ 12 0
24 NGC 6910 27 bC* 20 23 33.7529737579 +40 45 19.930686094   12.82 11.77     B1III 21 0
25 Ass Cyg OB 2 As* 20 33.2 +41 19           ~ 1023 0
26 NGC 7067 OpC 21 24 14.0 +48 00 55   10.64 9.7     ~ 63 0
27 NGC 7128 OpC 21 43 58.0 +53 43 00   10.54 9.7     ~ 82 0
28 Cl* NGC 6910 DA 145 * ~ ~   16.84 15.65     ~ 1 0
29 Cl* NGC 6910 DA 131 * ~ ~   19.18 17.63     ~ 1 0
30 Cl* NGC 6910 DA 185 * ~ ~   16.20 15.24     ~ 1 0
31 Cl* NGC 6910 DA 2340 * ~ ~   14.36 13.52     ~ 1 0
32 Cl* NGC 6910 DA 3026 * ~ ~   14.57 13.56     ~ 2 0
33 Cl* NGC 6910 DA 3036 * ~ ~   14.79 13.84     ~ 1 0
34 Cl* NGC 6910 DA 59 * ~ ~   15.09 14.12     ~ 1 0
35 Cl* NGC 6910 DA 34 * ~ ~   15.34 14.51     ~ 1 0
36 Cl* NGC 6910 DA 3006 * ~ ~   15.70 14.65     ~ 1 0
37 Cl* NGC 6910 DA 3021 * ~ ~   15.23 14.19     ~ 1 0
38 Cl* NGC 6910 DA 2016 * ~ ~   15.40 14.60     ~ 1 0
39 Cl* NGC 6910 DA 3011 * ~ ~   15.51 14.61     ~ 1 0
40 Cl* NGC 6910 DA 2007 * ~ ~   15.57 14.72     ~ 1 0
41 Cl* NGC 6910 DA 65 * ~ ~   15.99 14.89     ~ 1 0
42 Cl* NGC 6910 DA 251 * ~ ~   15.92 14.94     ~ 1 0
43 Cl* NGC 6910 DA 3004 * ~ ~   16.13 15.02     ~ 1 0
44 Cl* NGC 6910 DA 3010 * ~ ~   16.46 15.34     ~ 1 0
45 Cl* NGC 6910 DA 3052 * ~ ~   16.61 15.59     ~ 1 0
46 Cl* NGC 6910 DA 3105 * ~ ~   16.88 15.62     ~ 1 0
47 Cl* NGC 6910 DA 3097 * ~ ~   17.44 16.12     ~ 1 0
48 Cl* NGC 6910 DA 3027 * ~ ~   17.62 16.24     ~ 1 0
49 Cl* NGC 6910 DA 3014 * ~ ~   17.61 16.26     ~ 1 0
50 Cl* NGC 6910 DA 2161 * ~ ~   16.25 15.23     ~ 1 0
51 Cl* NGC 6910 DA 2044 * ~ ~   16.51 15.54     ~ 1 0
52 Cl* NGC 6910 DA 2026 * ~ ~   17.73 16.33     ~ 1 0
53 Cl* NGC 6910 DA 2079 * ~ ~   19.16 17.52     ~ 1 0
54 Cl* NGC 6910 DA 53 * ~ ~   16.18 15.28     ~ 1 0
55 Cl* NGC 6910 DA 30 * ~ ~   16.64 15.54     ~ 1 0
56 Cl* NGC 6910 DA 64 * ~ ~   16.78 15.59     ~ 1 0

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