Dust in dwarf galaxies: The case of NGC 4214
U. Lisenfeld, I. Hermelo, M. Relano, R. Tuffs, J. Fischera, B. Groves,, C. Popescu
TL;DR
This study models dust heating and emission in the nearby dwarf galaxy NGC 4214, leveraging extensive multi-wavelength data to distinguish between different dust regions and accurately fit observed emissions.
Contribution
It provides a detailed, data-driven model of dust emission in NGC 4214, with minimal free parameters and realistic dust properties, enhancing understanding of dust processes in dwarf galaxies.
Findings
Successful modeling of both HII+PDR and diffuse dust emission
Use of multi-wavelength data from UV to millimeter range
Minimal free parameters with realistic dust properties
Abstract
We have carried out a detailed modelling of the dust heating and emission in the nearby, starbursting dwarf galaxy NGC 4214. Due to its proximity and the great wealth of data from the UV to the millimeter range (from GALEX, HST, {\it Spitzer}, Herschel, Planck and IRAM) it is possible to separately model the emission from HII regions and their associated photodissociation regions (PDRs) and the emission from diffuse dust. Furthermore, most model parameters can be directly determined from the data leaving very few free parameters. We can fit both the emission from HII+PDR regions and the diffuse emission in NGC 4214 with these models with "normal" dust properties and realistic parameters.
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