A new technique to isolate kinematically anomalous gas in HI data cubes
A new technique to isolate kinematically anomalous gas in HI data cubes
复制标题
一种隔离 HI 数据立方体中运动学异常气体的新技术
DOI:
10.1093/mnras/stac3443
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发表时间:
2022
影响因子:
4.8
通讯作者:
Baker, A J
中科院分区:
文献类型:
--
作者:
Randriamiarinarivo, N;Elson, E C;Baker, A J
Hiline 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 Higas in galaxies taken from thesimbacosmological simulation on galaxy properties such as Himass 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. We find that at fixed atomic gas mass fraction, the anomalous gas fraction increases with the specific star formation rate. We also find that the anomalous gas fraction does not have a significant dependence on a galaxy’s environment. Our decomposition method has the potential to yield useful insights from future Hisurveys.
DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
R. Thompson
通讯作者:
R. Thompson