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19 April 2024 |
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Article overview
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Properties of galaxies with an offset between the position angles of the major kinematic and photometric axes | | L.S.Pilyugin
; E.K.Grebel
; I.A.Zinchenko
; J.M.Vilchez
; F.Sakhibov
; Y.A.Nefedyev
; P.P.Berczik
; | | Date: |
6 Dec 2019 | | Abstract: | We derive the photometric, kinematic, and abundance characteristics of 18
star-forming MaNGA galaxies with fairly regular velocity fields and surface
brightness distributions and with a large offset between the measured position
angles of the major kinematic and photometric axes, dPA > 20 degree. The aim is
to examine if there is any other distinctive characteristic common to these
galaxies. We found morphological signs of interaction in some (in 11 out of 18)
but not in all galaxies. The observed velocity fields show a large variety; the
maps of the isovelocities vary from an hourglass-like appearance to a set of
straight lines. The position angles of the major kinematic axes of the stellar
and gas rotations are close to each other. The values of the central oxygen
abundance, radial abundance gradient, and star formation rate are distributed
within the intervals defined by galaxies with small (no) dPA of similar mass.
Thus, we do not find any specific characteristic common to all galaxies with
large dPA. Instead, the properties of these galaxies are similar to those of
galaxies with small (no) dPA. This suggests that either the reason responsible
for the large dPA does not influence other characteristics or the galaxies with
large dPA do not share a common origin, they can, instead, originate through
different channels. | | Source: | arXiv, 1912.3233 | | Services: | Forum | Review | PDF | Favorites | |
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