TL;DR
This paper studies the extended HI disks of nearby spiral galaxies, examining their kinematics, environmental influences, and formation processes using multi-wavelength data and 3D visualizations.
Contribution
It provides detailed analysis of giant 2X-HI disks, their dynamics, environmental effects, and formation mechanisms, including tidal interactions and accretion.
Findings
Identification of giant 2X-HI disks in several galaxies
Correlation between HI disks and XUV features
Insights into tidal interactions and dwarf galaxy formation
Abstract
The outskirts of galaxies - especially the very extended HI disks of galaxies - are strongly affected by their local environment. I highlight the giant 2X-HI disks of nearby galaxies (M 83, NGC 3621, and NGC 1512), studied as part of the Local Volume HI Survey (LVHIS), their kinematics and relation to XUV disks, signatures of tidal interactions and accretion events, the MHI - DHI relation as well as the formation of tidal dwarf galaxies. - Using multi-wavelength data, I create 3D visualisations of the gas and stars in galaxies, with the shape of their warped disks obtained through kinematic modelling of their HI velocity fields.
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