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arXiv · 1611.09936

ALMA Reveals Potential Localized Dust Enrichment from Massive Star Clusters in II Zw 40

S. Michelle Consiglio·Jean L. Turner·Sara Beck·David S. Meier
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Abstract

We present subarcsecond images of submillimeter CO and continuum emission from a local galaxy forming massive star clusters: the blue compact dwarf galaxy II Zw 40. At $\sim$0.4" resolution (20 pc), the CO(3-2), CO(1-0), 3mm and 870${\mu}$m continuum maps illustrate star formation on the scales of individual molecular clouds. Dust contributes about a third of the 870${\mu}$m continuum emission, with free-free accounting for the rest. On these scales, there is not a good correspondence between gas, dust, and free-free emission. Dust continuum is enhanced toward the star-forming region as compared to the CO emission. We suggest that an unexpectedly low and spatially variable gas-to-dust ratio is the result of massive clusters of the starburst.

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S. Michelle Consiglio, Jean L. Turner, Sara Beck, David S. Meier. 2016-11-29. ALMA Reveals Potential Localized Dust Enrichment from Massive Star Clusters in II Zw 40. https://doi.org/10.3847/2041-8205%2F833%2F1%2Fl6

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