J/AJ/116/2395 BV photometry in five SMC clusters (Mighell+, 1998)
WFPC2 observations of star clusters in the Magellanic clouds.
II. The oldest star clusters in the Small Magellanic Cloud.
Mighell K.J., Sarajedini A., French R.S.
<Astron. J. 116, 2395 (1998)>
=1998AJ....116.2395M 1998AJ....116.2395M (SIMBAD/NED BibCode)
ADC_Keywords: Magellanic Clouds ; Photometry, UBV ; Clusters, open
Keywords: galaxies: evolution - galaxies: individual: Small Magellanic Cloud -
galaxies: star clusters - galaxies: Local Group
Abstract:
We present our analysis of archival Hubble Space Telescope Wide Field
Planetary Camera 2 (WFPC2) observations in F450W (∼B) and F555W (∼V)
of the intermediate-age populous star clusters NGC 121, NGC 339,
NGC 361, NGC 416, and Kron 3 in the Small Magellanic Cloud. We use
published photometry of two other SMC populous star clusters,
Lindsay 1 and Lindsay 113, to investigate the age sequence of these
seven star clusters in order to improve our understanding of the
formation chronology of the SMC. We analyzed the V versus B-V and MV
versus (B-V)0 color-magnitude diagrams of these populous Small
Magellanic Cloud star clusters using a variety of techniques and
determined their ages, metallicities, and reddenings. These new data
enable us to improve the age-metallicity relation of star clusters in
the Small Magellanic Cloud. In particular, we find that a closed-box
continuous star formation model does not reproduce the age-metallicity
relation adequately. However, a theoretical model punctuated by bursts
of star formation is in better agreement with the observational data
presented herein.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tables.dat 46 34732 WFPC2 stellar photometry of the SMC clusters
NGC 416, 121, 339, 361 and Kron 3
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Byte-by-byte Description of file: tables.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Cluster Cluster name
9- 17 I9 --- MSF Identification number in the cluster (1)
20- 25 F6.3 mag Vmag V magnitude
28- 32 F5.3 mag e_Vmag rms uncertainty on Vmag
34- 39 F6.3 mag B-V colour index
42- 46 F5.3 mag e_B-V rms uncertainty on B-V
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Note (1): Cl* "Cluster" MSF Nyyyyxxxx in Simbad,
where N is the WFPC2 chip number (1, 2, 3 or 4),
yyyy the y coordinate of the star multiplied by 10 and
xxxx the x coordinate of the star multiplied by 10.
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History: From AJ electronic version
References:
Mighell et al., (Hodge 11) Paper I. 1996AJ....111.2314M 1996AJ....111.2314M
(End) James Marcout, Patricia Bauer [CDS] 05-Jan-1999