TY - JOUR

T1 - Cross-method Analysis of Corotation Radii Data Set for Spiral Galaxies

AU - Kostiuk, V.~S.

AU - Marchuk, A.~A.

AU - Gusev, A. S.

PY - 2024/7/1

Y1 - 2024/7/1

N2 - A corotation radius is a key characteristic of disk galaxies that is essential to determine the angular speed of the spiral structure Ωp, and therefore understand its nature. In the literature, there are plenty of methods to estimate this value, but do these measurements have any consistency? In this work, we collected a data set of corotation radius measurements for 547 galaxies, 300 of which had at least two values. An initial analysis reveals that most objects have rather inconsistent corotation radius positions. Moreover, a significant fraction of galactic disks is distinguished by a large error coverage and almost uniform distribution of measurements. These findings do not have any relation to spiral type, Hubble classification, or presence of a bar. Among other reasons, obtained results could be explained by the transient nature of spirals in a considerable part of galaxies. We have made our collected data sample publicly available, and have demonstrated on one example how it could be useful for future research by investigating a winding time value for a sample of galaxies with possible multiple spiral arm patterns.

AB - A corotation radius is a key characteristic of disk galaxies that is essential to determine the angular speed of the spiral structure Ωp, and therefore understand its nature. In the literature, there are plenty of methods to estimate this value, but do these measurements have any consistency? In this work, we collected a data set of corotation radius measurements for 547 galaxies, 300 of which had at least two values. An initial analysis reveals that most objects have rather inconsistent corotation radius positions. Moreover, a significant fraction of galactic disks is distinguished by a large error coverage and almost uniform distribution of measurements. These findings do not have any relation to spiral type, Hubble classification, or presence of a bar. Among other reasons, obtained results could be explained by the transient nature of spirals in a considerable part of galaxies. We have made our collected data sample publicly available, and have demonstrated on one example how it could be useful for future research by investigating a winding time value for a sample of galaxies with possible multiple spiral arm patterns.

KW - galaxies: fundamental parameters

KW - galaxies: kinematics and dynamics

KW - galaxies: structure

KW - Astrophysics - Astrophysics of Galaxies

UR - https://www.mendeley.com/catalogue/9fcf59cc-fa92-36c9-aa4d-1d88779b38ad/

U2 - 10.1088/1674-4527/ad4d3b

DO - 10.1088/1674-4527/ad4d3b

M3 - Article

VL - 24

JO - Research in Astronomy and Astrophysics

JF - Research in Astronomy and Astrophysics

SN - 1674-4527

IS - 7

M1 - 075007

ER -