Cross-method analysis of co-rotation radii dataset for spiral galaxies
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , |
|---|---|
| Format: | Preprint |
| Publié: |
2024
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866929347043000320 |
|---|---|
| author | Kostiuk, Valeria S. Marchuk, Alexander A. Gusev, Alexander S. |
| author_facet | Kostiuk, Valeria S. Marchuk, Alexander A. Gusev, Alexander S. |
| contents | A co-rotation radius is a key characteristic of disc galaxies that is essential to determine the angular speed of the spiral structure $Ω_{p}$, 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 dataset 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 discs 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_10673 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Cross-method analysis of co-rotation radii dataset for spiral galaxies Kostiuk, Valeria S. Marchuk, Alexander A. Gusev, Alexander S. Astrophysics of Galaxies A co-rotation radius is a key characteristic of disc galaxies that is essential to determine the angular speed of the spiral structure $Ω_{p}$, 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 dataset 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 discs 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. |
| title | Cross-method analysis of co-rotation radii dataset for spiral galaxies |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2405.10673 |