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J/A+A/452/179       Ages of SMC young clusters and field stars   (Chiosi+, 2006)

Age distribution of young clusters and field stars in the SMC. Chiosi E., Vallenari A., Held E.V., Rizzi L., Moretti A. <Astron. Astrophys. 452, 179 (2006)> =2006A&A...452..179C
ADC_Keywords: Magellanic Clouds ; Associations, stellar ; Stars, ages Keywords: galaxies: Magellanic Clouds - galaxies: star clusters - galaxies: stellar content Abstract: In this paper we discuss the cluster and field star formation in the central part of the Small Magellanic Cloud. The main goal is to study the correlation between young objects and their interstellar environment. The ages of about 164 associations and 311 clusters younger than 1Gyr are determined using isochrone fitting. The spatial distribution of the clusters is compared with the HI maps, with the HI velocity dispersion field, with the location of the CO clouds and with the distribution of young field stars. Description: We give the catalog of 462 clusters and associations in the Bar of the SMC. We make use of OGLE data. For each cluster we determine age a nd reddening. An index of the quality of the results is also given. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 75 462 Age and reddening determination for 462 clusters and associations in the SMC Bar
See also: J/AJ/119/1214 : Census of star clusters in the SMC (Bica+, 2000) J/AcA/48/175 : OGLE SMC clusters (Pietrzynski+ 1998) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
4- 6 I3 --- Bica VizieR Recno number of table3 of Bica et al. (2000, Cat. J/AJ/119/1214) 8- 14 F7.4 deg RAdeg Right ascension (J2000.0) 16- 23 F8.4 deg DEdeg Declination (J2000.0) 25- 55 A31 --- Names Name of the clusters given by Bica et al. (2000, Cat. J/AJ/119/1214) 57- 61 F5.3 deg Rad Radius of the clusters given by Bica et al. (2000, Cat. J/AJ/119/1214) 63- 65 F3.1 [yr] log(Age) Age determination 67- 70 F4.2 mag E(V-I) Reddening determination 72- 73 A2 --- Type Type given by Bica et al. (2000, Cat. J/AJ/119/1214) (1) 75 I1 --- Class Class determination (2)
Note (1): Object types as follows: C = star cluster N = supernova remnant A = emissionless association CA = object with intermediate properties of class C and A AC = object with intermediate properties of class A and C AN = association that shows a trace of emission CN = cluster that shows a trace of emission NA = H II region and embedded association NC = H II regions and embedded star cluster or high surface brightness compact H II regions Note (2): Class gives an estimate of the uncertainties on the age determination as follows: 1 = objects having Delta(Log(Age(yr)))<0.3 2 = objects having 0.3<Delta(Log(Age(yr)))<0.5 3 = objects having Delta(Log(Age(yr)))>0.5
Acknowledgements: Emanuela Chiosi, echiosi(at)pd.astro.it
(End) Patricia Vannier [CDS] 18-May-2006
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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