Investigating the extraplanar components in isolated late-type edge-on galaxies
María Minerva Muñoz Sardaneta
Some highly inclined (i≥80°) late-type galaxies with high star formation rates (SFR) exhibit an extraplanar diffuse ionized gas (eDIG) component, which often extends several kiloparsecs above the galactic disc. Studying the kinematic effects of the eDIG is crucial to understand its interaction with galactic properties. Although several studies using data from integral field units (IFU) spectroscopy have been made, there is currently no conclusive common result on the origin of the eDIG. We selected 14 nearby highly inclined late-type galaxies from the Catalogue of Isolated Galaxies (CIG) to investigate the environmental influences on the eDIG incidence.
This sample aims to serve as a baseline for comparison with interacting galaxies, providing insights into the formation and properties of eDIG. We present the Hα monochromatic, radial velocity and velocity dispersion maps of galaxies in our sample obtained from observations made with scanning Fabry-Perot (FP) interferometry. To highlight the stellar disc structure, we compare our FP data with near-infrared (NIR) and ultraviolet (UV) images available in the literature. We also compute the Hα rotation curves of galaxies in our sample, and we analyse the rotation of the extraplanar component. Photometric and kinematic characteristics of the galaxies in our sample seems to indicate that the origin of the eDIG corresponds rather to the interaction with the Circumgalactic Medium (CGM) than an internal origin.
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