J/ApJ/756/L32 BVI photometry of the SMC star cluster ESO 51-SC09 (Piatti, 2012)
Identification of a new relatively old star cluster in the Small Magellanic
Cloud.
Piatti A.E.
<Astrophys. J., 756, L32 (2012)>
=2012ApJ...756L..32P 2012ApJ...756L..32P
ADC_Keywords: Magellanic Clouds ; Clusters, open ; Photometry, VRI
Keywords: techniques: photometric; galaxies: individual: SMC;
galaxies: star clusters: individual: ESO 51-SC09
Abstract:
We present results on the age and metallicity estimates of the
astonishingly unstudied Small Magellanic Cloud (SMC) cluster
(ESO 51-SC09), from CCD BVI photometry obtained at the ESO NTT with
the EMMI attached. ESO 51-SC09 turns out to be a relatively small
cluster (FWHM=10±1pc) located ∼4° northward from the galaxy
center. We report for the first time a mean cluster age of
7.0±1.3Gyr and a mean cluster metallicity of [Fe/H]=-1.00±0.15
dex, concluding that ESO 51-SC09 belongs to the group of the oldest
SMC clusters. We found that the cluster is projected onto an older
(age∼10-13Gyr) and more metal-poor ([Fe/H]=-1.3±0.2 dex) dominant
field stellar population, so that the cluster could have reached its
current location because of its orbital motion.
Description:
ESO 51-SC09 is a cataloged star cluster of the Small Magellanic Cloud
at J2000 position 00:58:57.96-68:54:55.7. Based on data obtained from
the European Southern Observatory (ESO) Science Archive Facility under
request number 33312, we collected BVI images centered on ESO 51-SC09
along with observations of the SA 113 and PG 0231+51 standard fields
and calibration frames (zero, dark, sky-flat, dome-flat). The data
were obtained at the ESO New Technology Telescope (NTT) with the ESO
Multi-Mode Instrument (EMMI) attached (scale=0.1665"/pixel).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 61 1677 BVI data of stars in the field of ESO 51-SC09
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See also:
B/eso : ESO Science Archive Catalog (ESO, 1991-2014)
II/183 : UBVRI Photometric Standards (Landolt 1992)
VII/34 : ESO/Uppsala Survey of the ESO(B) Atlas (Lauberts 1982)
J/MNRAS/417/1559 : CT1T2 photometry in 14 SMC star clusters (Piatti+, 2011)
J/MNRAS/403/996 : Clusters and associations in SMC and LMC (Bonatto+, 2010)
J/A+A/517/A50 : Ages of young SMC/LMC star clusters (Glatt+, 2010)
J/AJ/136/1703 : Ridgelines of six intermediate-age SMC clusters (Glatt+, 2008)
J/MNRAS/389/678 : Cat. of extended objects in Magellanic Clouds (Bica+, 2008)
J/ApJ/562/303 : Old Stellar Populations of the SMC (Dolphin+ 2001)
J/AJ/119/1214 : Census of star clusters in the SMC (Bica+, 2000)
J/AJ/116/2395 : BV photometry in five SMC clusters (Mighell+, 1998)
J/AJ/116/723 : LMC star clusters ages and metallicity (Bica+ 1998)
J/ApJS/101/41 : SMC and Bridge extended catalog (Bica+ 1995)
J/AJ/87/1165 : Reddening Maps derived from HI & Galaxy Cnts (Burstein+ 1982)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Seq [1/1677] Star identification number
(<[P2012] NNNN> in Simbad)
6- 13 F8.3 pix Xpix The X pixel coordinate
15- 22 F8.3 pix Ypix The Y pixel coordinate
24- 29 F6.3 mag Vmag [16.55/24.86] The NTT V band magnitude
31- 35 F5.3 mag e_Vmag [0.002/0.6] The 1σ uncertainty in Vmag
37- 42 F6.3 mag B-V The (B-V) color index
44- 48 F5.3 mag e_B-V The 1σ uncertainty in B-V
50- 55 F6.3 mag V-I The (V-I) color index
57- 61 F5.3 mag e_V-I The 1σ uncertainty in V-I
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 16-May-2014