Anomalous gas in ESO 149-G003: A MeerKAT-16 view

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dc.contributor.authorJozsa, G.I.G
dc.contributor.authorThorat, K
dc.contributor.authorSerylak, M
dc.date.accessioned2021-06-09T15:13:57Z
dc.date.available2021-06-09T15:13:57Z
dc.date.issued2021
dc.description.abstractESO 149-G003 is a close-by, isolated dwarf irregular galaxy. Previous observations with the ATCA indicated the presence of anomalous neutral hydrogen (H I) deviating from the kinematics of a regularly rotating disc. We conducted follow-up observations with the MeerKAT radio telescope during the 16-dish Early Science programme as well as with the MeerLICHT optical telescope. Our more sensitive radio observations confirm the presence of anomalous gas in ESO 149-G003, and further confirm the formerly tentative detection of an extraplanar H I component in the galaxy. Employing a simple tilted-ring model, in which the kinematics is determined with only four parameters but including morphological asymmetries, we reproduce the galaxy's morphology, which shows a high degree of asymmetry. By comparing our model with the observed H I, we find that in our model, we cannot account for a significant (but not dominant) fraction of the gas. From the differences between our model and the observed data cube, we estimate that at least 7-8 per cent of the H I in the galaxy exhibits anomalous kinematics, while we estimate a minimum mass fraction of less than 1 per cent for the morphologically confirmed extraplanar component.en_US
dc.identifier.citationJozsa, G.I.G. et al. (2021). Anomalous gas in ESO 149-G003: A MeerKAT-16 view. Monthly Notices of the Royal Astronomical Society ,501(2), 2704-2723en_US
dc.identifier.issn00358711
dc.identifier.uri10.1093/mnras/staa3770
dc.identifier.urihttp://hdl.handle.net/10566/6271
dc.language.isoenen_US
dc.publisherOxford University Pressen_US
dc.subjectGalaxies: dwarfen_US
dc.subjectGalaxies: evolutionen_US
dc.subjectGalaxies: individualen_US
dc.subjectESO 149-G003en_US
dc.subjectGalaxies: ISMen_US
dc.subjectGalaxies: kinematics and dynamicsen_US
dc.titleAnomalous gas in ESO 149-G003: A MeerKAT-16 viewen_US
dc.typeArticleen_US

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