Towards a More Complex Understanding of Natal Super Star Clusters with Multiwavelength Observations

Henize 2-10 (He 2-10) is a nearby (D = 9 Mpc) starbursting blue compact dwarf galaxy that boasts a high star formation rate and a low luminosity AGN. He 2-10 is also one of the first galaxies in which embedded superstar clusters (SSCs) were discovered. SSCs are massive, compact star clusters that wi...

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Bibliographic Details
Published in:arXiv.org 2021-07
Main Authors: Costa, Allison H, Johnson, Kelsey E, Indebetouw, Remy, Finn, Molly K, Brogan, Crystal L, Reines, Amy
Format: Article
Language:English
Subjects:
Active galactic nuclei
Angular resolution
Compact galaxies
Dwarf galaxies
Galactic evolution
Globular clusters
Luminosity
Massive stars
Molecular clouds
Spatial resolution
Star & galaxy formation
Star clusters
Star formation rate
Stellar evolution
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Summary:Henize 2-10 (He 2-10) is a nearby (D = 9 Mpc) starbursting blue compact dwarf galaxy that boasts a high star formation rate and a low luminosity AGN. He 2-10 is also one of the first galaxies in which embedded superstar clusters (SSCs) were discovered. SSCs are massive, compact star clusters that will impact their host galaxies dramatically when their massive stars evolve. Here, we discuss radio, submillimeter, and infrared observations of He 2-10 from 1.87 microns to 6 cm in high angular resolution (~0.3 arcsec), which allows us to disentangle individual clusters from aggregate complexes as identified at lower resolution. These results indicate the importance of spatial resolution to characterize SSCs, as low resolution studies of SSCs average over aggregate complexes that may host SSCs at different stages of evolution. We explore the thermal, non-thermal, and dust emission associated with the clusters along with dense molecular tracers to construct a holistic review of the natal SSCs that have yet to dramatically disrupt their parent molecular clouds. We assess the production rate of ionizing photons, extinction, total mass, and the star formation efficiency associated with the clusters. Notably, we find that the star formation efficiency for the some of the natal clusters is high (>70%), which suggests that these clusters could remain bound even after the gas is dispersed from the system from stellar feedback mechanisms. If they remain bound, these SSCs could survive to become objects indistinguishable from globular clusters.
ISSN:2331-8422
DOI:10.48550/arxiv.2107.02695