Integral field spectroscopy in the near infrared of NGC 3125-A and SBS 0335-052
L. Vanzi, G. Cresci, M. Sauvage, R. Thompson
TL;DR
This study uses high-resolution near-infrared integral field spectroscopy with adaptive optics to analyze star-forming regions and interstellar medium components in two dwarf galaxies, revealing new insights into their star formation processes.
Contribution
It provides the first clear detection of [FeII] in SBS 0335-052 and maps the spatial distribution of various ISM components in these low-metallicity galaxies.
Findings
[FeII] emission detected in SBS 0335-052 for the first time.
Near-infrared line emissions do not coincide with HII regions in NGC 3125.
ISM components are spatially related to star formation activity.
Abstract
We present integral field spectroscopy in the near infrared of the nearby dwarf starburst galaxies NGC 3125-A and of the low metallicity dwarf galaxy SBS 0335-052. The use of adaptive optics in the observations produces sub-arcsecond angular resolution. We pinpoint the star forming cores of both galaxies, identify relevant ISM components such as dust, photo ionized gas, shock excited gas and molecular gas. We relate these components to the large scale star formation process of the galaxies. In particular we find the emission of the near infrared lines of H2 and especially [FeII] does not coincide with the HII region in NGC 3125. We have the first clear detection of [FeII] in SBS 0335-052.
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