Embedded Clusters in the Large Magellanic Cloud Using the VISTA Magellanic Clouds Survey

Abstract

We present initial results of the first large scale survey of embedded star clusters in molecular clouds in the Large Magellanic Cloud (LMC) using near-infrared (NIR) imaging from the VISTA Magellanic Clouds Survey (Cioni et al. 2011). We have explored a ~1.65 square degree area of the LMC, which contains the well-known star-forming region 30 Doradus as well as ~14 percent of the galaxy's CO clouds (Wong et al. 2011), and have identified 67 embedded cluster candidates, 45 of which are newly discovered as clusters. We have determined sizes, luminosities and masses for these embedded clusters, examined the star formation rates (SFRs) of their corresponding molecular clouds, and made a comparison between the LMC and the Milky Way. Our preliminary results indicate that embedded clusters in the LMC are generally larger, more luminous and more massive than those in the local Milky Way. We also find that the surface densities of both embedded clusters and molecular clouds is ~3 times higher than in our local environment, the embedded cluster mass surface density is ~40 times higher, the SFR is ~20 times higher, and the star formation efficiency is ~10 times higher. Despite these differences, the SFRs of the LMC molecular clouds are consistent with the SFR scaling law presented in Lada et al. (2012). This consistency indicates that while the conditions of embedded cluster formation may vary between environments, the overall process within molecular clouds may be universal.

arXiv comment11 pages, 10 figures, accepted for publication in ApJ on 1/23/16

References in corpus (17)

• PARSEC: stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code
• Embedded Clusters in Molecular Clouds
• The Milky Way in Molecular Clouds: A New Complete CO Survey
• On the Star Formation Rates in Molecular Clouds
• PARSEC evolutionary tracks of massive stars up to $350M_{\odot }$ at metallicities 0.0001$\le Z\le$0.04
• New PARSEC evolutionary tracks of massive stars at low metallicity: testing canonical stellar evolution in nearby star forming dwarf galaxies
• The VMC Survey - I. Strategy and First Data
• Star Formation Rates in Molecular Clouds and the Nature of the Extragalactic Scaling Relations
• The Magellanic Mopra Assessment (MAGMA). I. The Molecular Cloud Population of the Large Magellanic Cloud
• The Origin of Massive O-type Field Stars. Part II: Field O stars as runaways
• The VISTA Science Archive
• A general catalogue of extended objects in the Magellanic System
• Ages and Luminosities of Young SMC/LMC Star Clusters and the recent Star Formation History of the Clouds
• The California Molecular Cloud
• The star cluster formation history of the LMC
• Modeling the Near-Infrared Luminosity Functions of Young Stellar Clusters
• Molecular Cloud-scale Star Formation in NGC 300

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• The VMC Survey XXII. Hierarchical Star Formation in the 30 Doradus-N158-N159-N160 Star-Forming Complex
• The VMC Survey - XXI. New star cluster candidates discovered from infrared photometry in the Small Magellanic Cloud
• The VMC survey -- LIII. Data release #7. Complete survey data and data from additional programmes