Mon. Not. R. Astron. Soc., 483, 1624-1641 (2019/February-3)
An ALMA archival study of the clump mass function in the Large Magellanic Cloud.
BRUNETTI N. and WILSON C.D.
Abstract (from CDS):
We present 1.3 and 3.2 mm continuum maps of three star-forming regions in the Large Magellanic Cloud (LMC) observed with the Atacama Large Millimeter/Submillimeter Array (ALMA). The data were taken from two projects retrieved from the ALMA public archive and from one project observed specifically for this work. We develop a technique to combine maps at these wavelengths to estimate dust-only emission corrected for free-free emission contamination. From these observations, we identify 32 molecular clumps in the LMC and estimate their total mass from their dust emission to range from 205 to 5740 M☉. We derive a cumulative clump mass function (N(>=M) ∝ M^α + 1^) and fit it with a double power law to find αlow = -1.76+0.04–0.05, αhigh = -3.3 ± 0.2, with a break mass of 2500+300–200M☉. A comparison with the 30 Doradus-10 mass function derived previously from CO (2-1) data reveals a consistent range of clump masses and good agreement between the fitted slopes. We also find that the low-mass index of the LMC mass function agrees well with the high-mass index for core and clump mass functions from several star-forming regions in the Milky Way. This agreement may indicate an extension of the Milky Way power law to higher masses than previously observed.
© 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society
stars: formation - ISM: clouds - galaxies: individual: Large Magellanic Cloud
Table 4: [BW2019] 30 Dor-10 NN (Nos 1-22), [BW2019] N159W N (Nos 1-7), [BW2019] N159E N (Nos 1-3).
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PCC 11546 is PGCC G282.98-32.40 in Simbad.
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