ALMA Reveals Potential Localized Dust Enrichment from Massive Star Clusters in II Zw 40
| Autor: | Consiglio, S. Michelle, Turner, Jean L., Beck, Sara, Meier, David S. |
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| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | The Astrophysical Journal Letters, Volume 833, Issue 1, article id. L6, 6pp. (2016) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.3847/2041-8205/833/1/L6 |
| Popis: | 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. Comment: 5 pages, 3 figures |
| Databáze: | arXiv |
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