2007A&A...473..437A


Query : 2007A&A...473..437A

2007A&A...473..437A - Astronomy and Astrophysics, volume 473, 437-444 (2007/10-2)

Integrated spectral properties of 22 small angular diameter galactic open clusters.

AHUMADA A.V., CLARIA J.J. and BICA E.

Abstract (from CDS):

Flux-calibrated integrated spectra of a sample of 22 Galactic open clusters of small angular diameter are presented. With one exception (ESO429-SC2), all objects have Galactic longitudes in the range 208°<l<33°. The spectra cover the range ≃3600-6800Å, with a resolution of ≃14Å. The properties of the present cluster sample are compared with those of well-studied clusters located in two 90° sectors, centred at l=257° and l=347°. The dissolution rate of Galactic open clusters in these two sectors is examined. Using the equivalent widths of the Balmer lines and comparing line intensities and continuum distribution of the cluster spectra with those of template cluster spectra with known properties, we derive both foreground reddening values and ages. Thus, we provide information independent of that determined through colour-magnitude diagrams. The derived E(B-V) values for the whole sample vary from 0.0 in ESO445-SC74 to 1.90 in Pismis24, while the ages range from ∼3Myr (NGC6604 and BH151) to ∼3.5Gyr (Ruprecht2). For six clusters (Dolidze34, ESO429-SC2, ESO445-SC74, Ruprecht2, BH151 and Hogg9) the foreground E(B-V) colour excesses and ages are determined for the first time. The results obtained for the remaining clusters show, in general terms, good agreement with previous photometric results. The age and reddening distributions of the present sample match those of known clusters in the two selected Galactic sectors. The present results would favour a major dissolution rate of star clusters in these two sectors. Two new solar-metallicity templates are defined corresponding to the age groups of (4-5) Myr and 30Myr among those of Piatti et al. (2002MNRAS.335..233P). The Piatti et al. templates of 20Myr and (3-4)Gyr are here redefined.

Abstract Copyright:

Journal keyword(s): methods: observational - techniques: spectroscopic - open clusters and associations: general

Simbad objects: 66

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Number of rows : 66
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 L 595-22 PM* 05 56 24.7419040752 -27 51 32.361761700   12.31 12.38     sdG 151 0
2 NGC 2158 OpC 06 07 27 +24 05.9           ~ 267 0
3 CD-29 3349 * 06 40 59.6 -29 32 36           ~ 1 0
4 C 0639-295 OpC 06 41 01 -29 33.0           ~ 6 0
5 ESO 426-33 OpC 06 42 06 -29 26.7           ~ 15 0
6 C 0646+004 OpC 06 48 54 +00 23.0   10.24 9.7     ~ 35 0
7 Cl Berkeley 75 OpC 06 49 00 -23 59.9           ~ 49 0
8 NGC 2311 OpC 06 57 47.3 -04 36 36     9.6     ~ 34 0
9 Cl Bochum 5 OpC 07 31 00 -16 56.0   7.74 7.0     ~ 35 0
10 NGC 2409 OpC 07 31 30 -17 13.7   7.48 7.3     ~ 38 0
11 BD-16 1994 * 07 31 37.1590788384 -17 11 23.416738692   10.4 9.08     ~ 2 0
12 ESO 429-2 OpC 07 33 23.0 -28 12 17   9.3       ~ 9 0
13 Cl Pismis 7 OpC 08 41 09 -38 41.9           ~ 15 0
14 CD-34 6792 PM* 10 32 13.6185546336 -35 37 41.711776068   12.84 11.84     F:wl: 136 0
15 C 1056-587 OpC 10 58 24 -59 03.2   10.94 10.6     ~ 13 0
16 NGC 3572 OpC 11 10 34 -60 17.6           ~ 81 0
17 Cl Hogg 10 OpC 11 10 39 -60 23.1           ~ 45 0
18 HD 97253 SB* 11 10 42.0464340864 -60 23 04.115936364 6.42 7.24 7.09 8.08   O5III(f) 81 0
19 ESO 93-8 GlC 11 19 41.9 -65 13 11           ~ 19 0
20 Cl Hogg 15 OpC 12 43 37 -63 06.1   11.21 10.3     ~ 50 0
21 Ass Cen OB 1 As* 13 02 -61.4           ~ 105 0
22 HD 116841 * 13 27 46.7673845640 -62 17 22.770068640 12.11 10.15 8.51     K3(III) 6 0
23 Cl Basel 18 OpC 13 27 52 -62 18.4   8.50 8.2     ~ 33 1
24 Cl Trumpler 21 OpC 13 32 16 -62 47.2   7.78 7.7     ~ 46 0
25 GRS G308.60 +00.60 HII 13 39.9 -61 45           ~ 98 0
26 Cl VDBH 151 OpC 13 40 12 -61 43.9           ~ 14 0
27 CPD-62 3559 * 13 46 25.6585698096 -62 55 55.627971132   9.98 8.384     K2II/III 13 0
28 NGC 5281 OpC 13 46 27 -62 55.0   6.15 5.9     ~ 78 0
29 HD 119682 Be* 13 46 32.5709610312 -62 55 24.156893676 7.26 7.978 7.901 8.72   B0Ve 59 0
30 CD-62 762 * 13 46 34.2246555696 -62 55 09.787944684 8.55 8.589 8.531     B9III 12 0
31 HD 119699 * 13 46 36.5897607768 -62 54 34.618829076 6.99 9.07 6.588 7.54   A1II 27 0
32 ESO 445-74 OpC 13 54 43.0 -31 58 44           ~ 6 0
33 Cl Lynga 1 OpC 13 59 59 -62 09.1           ~ 47 0
34 CD-32 9927 * 14 11 46.3227735768 -33 03 14.373268704   10.793 10.444 10.12 10.106 A4 93 0
35 Cl Pismis 20 OpC 15 15 24 -59 04.4   8.69 7.8     ~ 92 0
36 HD 134959 s*b 15 15 24.0871041696 -59 04 29.296677756 9.05 9.14 8.10 8.642   B2Ia 77 0
37 MR 55 WR* 15 15 32.6272277376 -59 02 30.695283672 12.46 12.56 11.84 11.63   WN6-w 68 0
38 LP 916-15 PM* 15 38 59.6479538952 -28 35 36.973634856   12.19 11.62     A 109 0
39 CD-38 10980 WD* 16 23 33.8380498896 -39 13 46.161043572 9.916 10.885 11.029 10.936 10.841 DA2 462 0
40 Cl Ruprecht 119 OpC 16 28 09 -51 30.0           ~ 40 0
41 NGC 6204 OpC 16 46 09 -47 01.6   8.51 8.2     ~ 119 0
42 Cl Hogg 22 OpC 16 46 34 -47 06.2           ~ 65 0
43 HD 150958 ** 16 46 38.8728467256 -47 05 24.623668536 7.01 7.64 7.30 8.22   O6.5Ia(n)f 82 1
44 NGC 6253 OpC 16 59 07 -52 42.7     10.2     ~ 166 0
45 NGC 6318 OpC 17 16 11 -39 25.4     11.8     ~ 25 1
46 Cl VDBH 217 OpC 17 16 17 -40 48.9           ~ 22 0
47 Cl Pismis 24 OpC 17 24 43.0 -34 12 23           ~ 116 0
48 HD 319718 ** 17 24 43.490 -34 11 57.03 12.28 11.94 10.44 10.05   O3.5If* 85 0
49 HD 319718A SB* 17 24 43.50 -34 11 56.8           ~ 10 1
50 NGC 6357 OpC 17 24 44 -34 12.2           ~ 262 0
51 GSC 07383-00677 * 17 24 49.92 -34 12 25.4   9.7       ~ 1 0
52 HD 157504 WR* 17 25 08.8532916336 -34 11 12.498318168 12.80 12.10 10.68 10.39 11.546 WC7+O7-9 112 0
53 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 12988 0
54 Cl VDBH 245 OpC 17 46 15 -29 42.0           ~ 17 0
55 Cl Mrk 38 OpC 18 15 17 -18 59.8           ~ 33 0
56 HD 167287 s*b 18 15 16.7673676656 -18 59 33.899947188 6.38 8.70 8.76 8.10   B1Iab 45 0
57 NGC 6604 OpC 18 18 03 -12 14.5           ~ 129 0
58 HD 167971 s*b 18 18 05.8947362832 -12 14 33.313601112 7.89 8.27 7.50 6.68 6.279 O8Iaf(n)+O4/5 285 0
59 NGC 6603 OpC 18 18 28 -18 24.5     11.1     ~ 75 1
60 RCW 167 HII 18 21 -11.9           ~ 6 0
61 CD-44 12736 PM* 18 36 25.9502475648 -44 18 36.907592904   10.83 10.22     G0 202 0
62 Cl Dolidze 34 OpC 18 41 54 -04 16.0           ~ 13 0
63 HD 172747 V* 18 42 03.1637205648 -04 32 43.859535756   10.43 9.79     F8V 4 0
64 Cl Berkeley 80 OpC 18 54 22 -01 12.8           ~ 21 0
65 CD-30 17706 WD* 20 10 56.8486912016 -30 13 06.627142663 11.654 12.286 12.242 12.311 12.381 DA3.1 233 0
66 NAME CMa Region reg ~ ~           ~ 43 0

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2022.07.03-20:45:37

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