J/MNRAS/454/839 VMC survey. XVI. (Piatti+, 2015)
The VMC survey. XVI. Spatial variation of the cluster formation activity in the
innermost regions of the Large Magellanic Cloud.
Piatti A.E., De Grijs R., Ripepi V., Ivanov V.D., Cioni M.-R.L.,
Marconi M., Rubele S., Bekki K., For B.-Q.
<Mon. Not. R. Astron. Soc., 454, 839-848 (2015)>
=2015MNRAS.454..839P 2015MNRAS.454..839P (SIMBAD/NED BibCode)
ADC_Keywords: Magellanic Clouds ; Photometry
Keywords: techniques: photometric - galaxies: individual: LMC -
Magellanic Clouds
Abstract:
We present results based on YJKs photometry of star clusters in the
Large Magellanic Cloud (LMC), distributed throughout the central part
of the galaxy's bar and the 30 Doradus region. We analysed the
field-star-decontaminated colour-magnitude diagrams of 313 clusters to
estimate their reddening values and ages. The clusters are affected by
a mean reddening of E(B-V)∈[0.2, 0.3]mag, where the average
internal LMC reddening amounts to ∼0.1-0.2mag. The region covering 30
Doradus includes clusters with reddening values in excess of
E(B-V)=0.4mag. Our cluster sample spans the age range
7.0≤log(t/yr)<9.0, represents an increase of 30 percent in terms of
the number of clusters with robust age estimates and comprises a
statistically complete sample in the LMC regions of interest here. The
resulting cluster frequencies suggest that the outermost regions of
the LMC bar first experienced enhanced cluster formation -
log(t/yr)∈[8.5, 9.0] - before the activity proceeded, although in a
patchy manner, to the innermost regions, for log(t/yr)<7.7. Cluster
frequencies in the 30 Doradus region show that the area is dominated
by very recent cluster formation. The derived star formation
frequencies suggest that the cluster and field-star populations do not
seem to have fully evolved as fully coupled systems during the last
∼100Myr.
Description:
The VMC and its initial data are thoroughly described in Cioni et al.
(2011A&A...527A.116C 2011A&A...527A.116C), to which we refer the reader for details. Here,
we used data of two VMC tiles located in the central part of the LMC
bar (LMC 6_4) and in a region covering the 30 Doradus star-forming
region (LMC 6_6), for which the VISTA imaging campaign has been
completed.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 58 313 *Fundamental parameters of the LMC clusters
studied here
clusters/* . 313 Individual cluster YJKs photometry
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Note on table1.dat: We assume a distance modulus of 18.49mag and a
metallicity of [Fe/H]=-0.4dex.
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See also:
J/MNRAS/424/1807 : VISTA Magellanic Cloud Survey. V. Cepheids (Ripepi+, 2012)
J/A+A/554/A33 : VMC Survey. VII. 30 Doradus reddening map (Tatton+, 2013)
J/MNRAS/449/639 : VMC survey. XIV. SFR in SMC (Rubele+, 2015)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Cluster name
13- 18 F6.3 deg RAdeg Right ascension (J2000)
20- 26 F7.3 deg DEdeg Declination (J2000)
28- 31 F4.2 arcmin Dist Distance
33- 36 F4.2 mag E(B-V) Redenning
38- 41 F4.2 [yr] logt Age
43- 58 A16 --- FileName Name of the file with photometry in
subdirectory clusters
--------------------------------------------------------------------------------
Byte-by-byte Description of file: clusters/*
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
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1- 7 F7.3 mag Ymag ?=-99.999 Y magnitude
9- 15 F7.3 mag e_Ymag ?=-99.999 rms uncertainty on Ymag
17- 23 F7.3 --- shY ?=-99.999 Sharpness parameter in Y (1)
25- 31 F7.3 mag Jmag ?=-99.999 J magnitude
33- 39 F7.3 mag e_Jmag ?=-99.999 rms uncertainty on Jmag
41- 47 F7.3 --- shJ ?=-99.999 Sharpness parameter in J (1)
49- 55 F7.3 mag Ksmag ?=-99.999 Ks magnitude
57- 63 F7.3 mag e_Ksmag ?=-99.999 rms uncertainty on Ksmag
65- 71 F7.3 --- shKs ?=-99.999 Sharpness parameter in Ks (1)
73- 85 F13.10 deg RAdeg Cluster centre right ascension (J2000)
87-100 F14.10 deg DEdeg Cluster centre declination (J2000)
103 I1 --- Pmemb [1/4] Photometric membership probability code (2)
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Note (1): sharpness for every source within a circle of radius three times
that of the cluster and centred on the cluster's centre
Note (2): Photometric membership probability code as follows:
1 = 25%
2 = 50%
3 = 75%
4 = 100%
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History:
From electronic version of the journal
References:
Cioni et al. 2011Msngr.144...25C 2011Msngr.144...25C
Cioni et al. Paper I 2011A&A...527A.116C 2011A&A...527A.116C Cat. II/351
Miszalski et al. Paper II 2011A&A...531A.157M 2011A&A...531A.157M
Gullieuszik et al. Paper III 2012A&A...537A.105G 2012A&A...537A.105G
Rubele et al. Paper IV 2012A&A...537A.106R 2012A&A...537A.106R
Ripepi et al. Paper V 2012MNRAS.424.1807R 2012MNRAS.424.1807R Cat. J/MNRAS/424/1807
Cioni et al. Paper VI 2013A&A...549A..29C 2013A&A...549A..29C Cat. J/A+A/549/29
Tatton et al. Paper VII 2013A&A...554A..33T 2013A&A...554A..33T Cat. J/A+A/554/A33
Ripepi et al. Paper VIII 2014MNRAS.437.2307R 2014MNRAS.437.2307R Cat. J/MNRAS/437/2307
Cioni et al. Paper IX 2014A&A...562A..32C 2014A&A...562A..32C
Moretti et al. Paper X 2014MNRAS.437.2702M 2014MNRAS.437.2702M Cat. J/MNRAS/437/2702
Li et al. Paper XI 2014ApJ...790...35L 2014ApJ...790...35L
Piatti et al. Paper XII 2014A&A...570A..74P 2014A&A...570A..74P
Ripepi et al. Paper XIII 2015MNRAS.446.3034R 2015MNRAS.446.3034R Cat. J/MNRAS/446/3034
Rubele et al. Paper XIV 2015MNRAS.449..639R 2015MNRAS.449..639R Cat. J/MNRAS/449/639
Piatti et al. Paper XV 2015MNRAS.450..552P 2015MNRAS.450..552P
Piatti et al. Paper XVI 2015MNRAS.454..839P 2015MNRAS.454..839P Cat. J/MNRAS/454/839
Cioni et al. Paper XVII 2016A&A...586A..77C 2016A&A...586A..77C
Zhang et al. Paper XVIII 2015ApJ...815...95Z 2015ApJ...815...95Z
Ripepi et al. Paper XIX 2016ApJS..224...21R 2016ApJS..224...21R Cat. J/ApJS/224/21
Moretti et al. Paper XX 2016MNRAS.459.1687M 2016MNRAS.459.1687M Cat. J/MNRAS/459/1687
Piatti et al. Paper XXI 2016MNRAS.460..383P 2016MNRAS.460..383P
Sun et al. Paper XXII 2017ApJ...835..171S 2017ApJ...835..171S
Marconi et al. Paper XXIII 2017MNRAS.466.3206M 2017MNRAS.466.3206M
Subramanian et al. Paper XXIV 2017MNRAS.467.2980S 2017MNRAS.467.2980S
Ripepi et al. Paper XXV 2017MNRAS.472..808R 2017MNRAS.472..808R
Muraveva et al. Paper XXVI 2018MNRAS.473.3131M 2018MNRAS.473.3131M
Sun et al. Paper XXVII 2017ApJ...849..149S 2017ApJ...849..149S Cat. J/ApJ/849/149
Niederhofer et al. Paper XXVIII 2018A&A...612A.115N 2018A&A...612A.115N
Sun et al. Paper XXIX 2018ApJ...858...31S 2018ApJ...858...31S This catalog
Niederhofer et al. Paper XXX 2018A&A...613L...8N 2018A&A...613L...8N
Rubele et al. Paper XXXI 2018MNRAS.478.5017R 2018MNRAS.478.5017R
Zivkov et al. Paper XXXII 2018A&A...620A.143Z 2018A&A...620A.143Z
Groenewegen et al. Paper XXXIII 2019A&A...622A..63G 2019A&A...622A..63G
(End) Patricia Vannier [CDS] 27-Jun-2016