J/MNRAS/499/4114 Properties of LMC star clusters (Gatto+, 2020)
A search for star clusters in the outskirts of the Large Magellanic Cloud:
indication of clusters in the age gap.
Gatto M., Ripepi V., Bellazzini M., Cignoni M., Cioni M.-R.L., Dall'Ora M.,
Longo G., Marconi M., Schipani P., Tosi M.
<Mon. Not. R. Astron. Soc., 499, 4114-4139 (2020)>
=2020MNRAS.499.4114G 2020MNRAS.499.4114G (SIMBAD/NED BibCode)
ADC_Keywords: Magellanic Clouds ; Clusters, open
Keywords: surveys - galaxies: evolution - Magellanic Clouds -
galaxies: star clusters: general
Abstract:
The YMCA (Yes, Magellanic Clouds Again) and STEP (The SMC in Time:
Evolution of a Prototype interacting late-type dwarf galaxy) projects
are deep g, i photometric surveys carried out with the VLT Survey
Telescope (VST) and devoted to study the outskirts of the Magellanic
System. A main goal of YMCA and STEP is to identify candidate stellar
clusters and complete their census out to the outermost regions of the
Magellanic Clouds. We adopted a specific overdensity search technique
coupled with a visual inspection of the colour-magnitude diagrams to
select the best candidates and estimate their ages. To date, we
analysed a region of 23 square degrees in the outskirts of the Large
Magellanic Cloud, detecting 85 candidate cluster candidates, 16 of
which have estimated ages falling in the so-called age gap. We use
these objects together with literature data to gain insight into the
formation and interaction history of the Magellanic Clouds.
Description:
The data used in this work were obtained with the VLT Survey Telescope
(VST) The telescope is equipped with OmegaCAM, a camera with a
field-of-view of 1x1deg2. The camera is a mosaic of 32-CCD,
16000x16000 detectors with a pixel scale of 0.214-arcsec/pix.
For each of the 85 SCs we report: equatorial coordinates, radius, age,
reddening, metallicity, apparent and absolute magnitude in the g-band,
the tile where the SC in question resides and a flag assessing the
reliability of each SC.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
clusters.dat 67 85 Cluster properties
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Byte-by-byte Description of file: clusters.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Cluster name (ymca-NNNN or step-NNNN)
11- 17 F7.4 deg RAdeg Right ascension (J2000.0)
19- 26 F8.4 deg DEdeg Declination (J2000.0)
28- 31 F4.2 arcmin Rad Cluster radius
33- 36 F4.2 [yr] logt Cluster age
38- 41 F4.2 mag E(B-V) Cluster reddening
43- 47 F5.3 --- Z Cluster metallicity
49- 53 F5.2 mag gmag Apparent magnitude in g-filter
55- 59 F5.2 mag gMAG Absolute magnitude in g-filter
61- 65 A5 --- Tile Tile where the SC resides
67 A1 --- Flag [0/3] Flag assessing reliability of the SC (1)
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Note (1): Each SC is flagged with a number comprised between 0 and 3, where 3
indicates the highest reliability and 0 the least one.
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Acknowledgements:
Massimiliano Gatto, massimiliano.gatto(at)inaf.it
(End) Patricia Vannier [CDS] 27-Jan-2021