Obscured Star Formation in the Dwarf Galaxy DDO 43? A Comparative UV-IR Analysis
\'Aron Juh\'asz, Enik\H{o} Pichler
TL;DR
This study investigates recent star formation in dwarf galaxy DDO 43 using UV and IR imaging, revealing both unobscured and dust-obscured star-forming regions through comparative analysis.
Contribution
It provides a comparative UV-IR analysis of star formation in DDO 43, highlighting the presence of both unobscured and obscured star-forming regions.
Findings
Correlation between UV and IR fluxes indicates coherent star formation.
Identification of regions with high IR but low UV flux suggests dust-obscured star formation.
Most regions show unobscured star formation activity.
Abstract
We present a study of recent star formation in the dwarf irregular galaxy DDO 43 using GALEX FUV and WISE NIR imaging. We identify regions of elevated FUV flux, indicating unobscured star-forming activity across much of the galaxy. To further characterize the stellar content, we compare the FUV fluxes to archival WISE W1 and W2 infrared data across 56 regions of interest. A general correlation is found between the FUV and infrared fluxes, suggesting spatially coherent star formation throughout the galaxy. A few regions, however, show elevated infrared fluxes but little or no UV emission, potentially indicating localized, dust-obscured star formation.
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Taxonomy
TopicsGalaxies: Formation, Evolution, Phenomena · Astronomy and Astrophysical Research · Astrophysics and Star Formation Studies