Request for Expertise: Observational Hypotheses Concerning Disk Galaxies
Hello. I am an amateur astronomer interested in the large-scale kinematics of disk galaxies. While analyzing publicly available observational data and scientific publications, I have formulated a set of what I believe are relatively straightforward and operationally testable hypotheses concerning the connection between the internal dynamics of galaxies and the formation of their spiral structure and gas kinematics. Запрос экспертизы по наблюдательным гипотезам дисковых галактик Below is a brief list of the hypotheses. The connection between bar strength and spiral arm pitch angle Hypothesis: In disk galaxies with a pronounced bar, the pitch angle of the spiral arms statistically correlates with the bar's parameters (length, ellipticity). How to test: Photometry (S4G, SDSS) and morphological classification; correlation analysis of bar parameters and pitch angle. Gas kinematic asymmetry in a dense environment Hypothesis: For galaxies in clusters, the asymmetry in gas velocities is m...