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

作　　者：V.S.Kostiuk A.A.Marchuk A.S.Gusev 

机构地区：[1]Sternberg Astronomical Institute,Lomonosov Moscow State University,Universitetsky pr.13,119234 Moscow,Russia [2]Central(Pulkovo)Astronomical Observatory,Russian Academy of Sciences,Pulkovskoye chaussee 65/1,196140 St.Petersburg,Russia [3]Saint Petersburg State University,Universitetsky pr.28,198504 St.Petersburg,Russia

出　　处：《Research in Astronomy and Astrophysics》2024年第7期95-110,共16页天文和天体物理学研究（英文版）

基　　金：support from“BASIS”Foundation for the Development of Theoretical Physics and Mathematics(grant No.23-2-2-6-1)。

摘　　要：A corotation radius is a key characteristic of disk galaxies that is essential to determine the angular speed of the spiral structureΩ_p,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.

关 键 词：GALAXIES fundamental parameters-galaxies kinematics and dynamics-galaxies STRUCTURE 

分 类 号：P152[天文地球—天文学]