A new technique to isolate kinematically anomalous gas in HI data cubes

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Date

2023

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Oxford University Press

Abstract

H I line observations of nearby galaxies often reveal the presence of extraplanar and/or kinematically anomalous gas that deviates from the general circular flow. In this work, we study the dependence of kinematically anomalous H I gas in galaxies taken from the SIMBA cosmological simulation on galaxy properties such as H I mass fraction, specific star formation rate, and local environmental density. To identify kinematically anomalous gas, we use a simple yet effective decomposition method to separate it from regularly rotating gas in the galactic disc; this method is well-suited for application to observational data sets but has been validated here using the simulation.

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Physics, Astronomy, Galaxies, Kinematics

Citation

Randriamiarinarivo, N. et al. (2023). A new technique to isolate kinematically anomalous gas in HI data cubes. Monthly Notices of the Royal Astronomical Society, 518(4), 5942–5952. https://doi.org/10.1093/mnras/stac3443

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https://doi.org/10.1093/mnras/stac3443
 http://hdl.handle.net/10566/9151

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Research Articles (Physics)