J/MNRAS/512/1196 LMC Young Stellar Structures (Miller+, 2022)
The VMC survey. XLVII. Turbulence-controlled hierarchical star formation
in the Large Magellanic Cloud.
Miller A.E., Cioni M.-R.L., de Grijs R., Sun N.-C., Bell C.P.M.,
Choudhury S., Ivanov V.D., Marconi M., Oliveira J.M., Petr-Gotzens M.,
Ripepi V., van Loon J.T.
<Mon. Not. R. Astron. Soc. 512, 1196-1213 (2022)>
=2022MNRAS.512.1196M 2022MNRAS.512.1196M (SIMBAD/NED BibCode)
ADC_Keywords: Magellanic Clouds ; Associations, stellar ; Clusters, open ;
Galaxies, IR ; Stars, early-type
Keywords: methods: statistical - stars: early type - stars: formation -
galaxies: individual: Magennalic Clouds - galaxies: stellar content -
galaxies: structure
Abstract:
We perform a statistical clustering analysis of upper main-sequence
stars in the Large Magellanic Cloud (LMC) using data from the Visible
and Infrared Survey Telescope for Astronomy survey of the Magellanic
Clouds. We map over 2500 young stellar structures at 15 significance
levels across ∼120 square degrees centred on the LMC. The structures
have sizes ranging from a few parsecs to over 1kpc. We find that the
young structures follow power-law size and mass distributions. From
the perimeter-area relation, we derive a perimeter-area dimension of
1.44±0.20. From the mass-size relation and the size distribution, we
derive two-dimensional fractal dimensions of 1.50±0.10 and
1.61±0.20, respectively. We find that the surface density
distribution is well-represented by a lognormal distribution. We apply
the Larson relation to estimate the velocity dispersions and crossing
times of these structures. Our results indicate that the fractal
nature of the young stellar structures has been inherited from the gas
clouds from which they form and that this architecture is generated by
supersonic turbulence. Our results also suggest that star formation in
the LMC is scale-free from 10pc to 700pc.
Description:
Parameters for 2486 detected young stellar structures in the LMC. The
parameters include structure ID, significance level above the median
background stellar density, geometric centroid coordinates, the
radius, the number of stars, the surface density, the velocity
dispersion, and the crossing time.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 152 2846 Parameters for the detected young stellar
structures
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- ID ID number
6- 7 I2 --- SigniLevel Significance level
9- 25 F17.14 deg RAdeg Right ascension (J2000)
27- 44 F18.14 deg DEdeg Declination (J2000)
46- 66 F21.16 pc Radius Radius
68- 90 F23.16 --- Nstar Number of stars
92-111 F20.18 pc-2 Surface Stellar surface density
113-131 F19.16 km/s sigma Velocity dispersion from the Larson relation
133-152 F20.16 Myr tcr Crossing time
--------------------------------------------------------------------------------
Acknowledgements:
Amy E. Miller, amiller(at)aip.de
References:
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, Cat. J/A+A/531/A157
Gullieuszik et al., Paper III 2012A&A...537A.105G 2012A&A...537A.105G, Cat. J/A+A/537/A105
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/A29
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
Sun et al., Paper XXVII 2017ApJ...849..149S 2017ApJ...849..149S, Cat. J/ApJ/849/149
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, Cat. J/MNRAS/472/808
Muraveva et al., Paper XXVI 2018MNRAS.473.3131M 2018MNRAS.473.3131M, Cat. J/MNRAS/473/3131
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, Cat. J/ApJ/858/31
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
El Youssoufi et al., Paper XXXIV 2019MNRAS.490.1076E 2019MNRAS.490.1076E
Ragosta et al., Paper XXXV 2019MNRAS.490.4975R 2019MNRAS.490.4975R
Zivkov et al., Paper XXXVI 2020MNRAS.494..458Z 2020MNRAS.494..458Z, Cat. J/MNRAS/494/458
Groenewegen et al., Paper XXXVII 2020A&A...636A..48G 2020A&A...636A..48G, Cat. J/A+A/636/A48
Schmidt et al., Paper XXXVIII 2020A&A...641A.134S 2020A&A...641A.134S
Choudhury et al., Paper XXXIX 2020MNRAS.497.3746C 2020MNRAS.497.3746C
Tatton et al., Paper XL 2021MNRAS.504.2983T 2021MNRAS.504.2983T
Niederhofer et al., Paper XLI 2021MNRAS.502.2859N 2021MNRAS.502.2859N
Cusano et al., Paper XLII 2021MNRAS.504....1C 2021MNRAS.504....1C
Mazzi et al., Paper XLIII 2021MNRAS.508..245M 2021MNRAS.508..245M
Choudhury et al., Paper XLIV 2021MNRAS.507.4752C 2021MNRAS.507.4752C
(End) Amy Miller [AIP], Patricia Vannier [CDS] 22-Feb-2022