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Two types of distribution of the gas velocity dispersion of MaNGA galaxies

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dc.contributor.author Pilyugin L.S.
dc.contributor.author Zinchenko I.A.
dc.contributor.author Lara-López M.A.
dc.contributor.author Nefedyev Y.A.
dc.contributor.author Vílchez J.M.
dc.date.accessioned 2022-02-09T20:30:31Z
dc.date.available 2022-02-09T20:30:31Z
dc.date.issued 2021
dc.identifier.issn 0004-6361
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/168632
dc.description.abstract The distribution of the gas velocity dispersion σ across the images of 1146 MaNGA galaxies is analyzed. We find that there are two types of distribution of the gas velocity dispersion across the images of galaxies: (i) the distributions of 909 galaxies show a radial symmetry with or without the σ enhancement at the center ("R distribution", radial symmetry in the σ distribution) and (ii) distributions with a band of enhanced σ along the minor axis in the images of 159 galaxies with or without the σ enhancement at the center ("B distribution", band in the σ distribution). The σ distribution across the images of 78 galaxies cannot be reliable classified. We select 806 galaxies with the best defined characteristics (this sample includes 687 galaxies with R distribution and 119 galaxies with B distribution) and compare the properties of galaxies with R and B distributions. We find that the median value of the gas velocity dispersion σm in galaxies with B distribution is higher by around 5 km s-1, on average, than that of galaxies with R distribution. The optical radius R25 of galaxies with B distribution is lower by around 0.1 dex, on average, than that of galaxies with similar masses with R distribution. Thus the properties of a galaxy are related to the type of distribution of the gas velocity dispersion σ across its image. This suggests that the presence of the band of the enhanced gas velocity dispersion can be an indicator of a specific evolution (or a specific stage in the evolution) of a galaxy.
dc.relation.ispartofseries Astronomy and Astrophysics
dc.subject Galaxies: ISM
dc.subject Galaxies: kinematics and dynamics
dc.title Two types of distribution of the gas velocity dispersion of MaNGA galaxies
dc.type Article
dc.relation.ispartofseries-volume 646
dc.collection Публикации сотрудников КФУ
dc.source.id SCOPUS00046361-2021-646-SID85100608295


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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