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Physical Properties of II Zw 40's Super Star Cluster and Nebula: New Insights and Puzzles from UV Spectroscopy

Leitherer, Claus; Byler, Nell; Lee, Janice; Levesque, Emily


We analyze far-ultraviolet spectra and ancillary data of the super star cluster SSC-N and its surrounding H II region in the nearby dwarf galaxy II Zw 40. From the ultraviolet spectrum, we derive a low internal reddening of E(B − V) = 0.07 ± 0.03, a mass of (9.1 ± 1.0) × 105 Me, a bolometric luminosity of (1.1 ± 0.1) × 109 Le, a number of ionizing photons of (6 ± 2) × 1052 s −1 , and an age of (2.8 ± 0.1) Myr. These parameters agree with the values derived from optical and radio data,...[Show more]

CollectionsANU Research Publications
Date published: 2018
Type: Journal article
Source: The Astrophysical Journal
DOI: 10.3847/1538-4357/aada84


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