On the relationship between the ellipticity of Galactic globular clusters and their X-ray luminosity
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2026
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866913041096900608 |
|---|---|
| author | Petrov, Georgi P. Botev, Svetoslav Valcheva, Antoniya Nedialkov, Petko |
| author_facet | Petrov, Georgi P. Botev, Svetoslav Valcheva, Antoniya Nedialkov, Petko |
| contents | We examine the dependence of the ellipticity of globular clusters in the Milky Way on their X-ray luminosity using two modern catalogs and combine them with optical and X-ray data from the literature. Kolmogorov-Smirnov tests applied across multiple subsets reveal statistically significant differences in the ellipticity distributions when both $L_{\rm X}$ and optical luminosity are considered. Two X-ray luminosity thresholds, $L_{\rm X}^*(M_{\rm{V}}=-7)=10^{33.05}$ erg/s and $L_{\rm X}^*(M_{\rm{V}}=-7)=10^{32.01}$ erg/s, yield the most reliable distinction. In contrast to earlier findings based solely on optical data, our results demonstrate that globular clusters with the highest X-ray luminosity tend to have higher ellipticity on average. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_16168 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | On the relationship between the ellipticity of Galactic globular clusters and their X-ray luminosity Petrov, Georgi P. Botev, Svetoslav Valcheva, Antoniya Nedialkov, Petko Astrophysics of Galaxies We examine the dependence of the ellipticity of globular clusters in the Milky Way on their X-ray luminosity using two modern catalogs and combine them with optical and X-ray data from the literature. Kolmogorov-Smirnov tests applied across multiple subsets reveal statistically significant differences in the ellipticity distributions when both $L_{\rm X}$ and optical luminosity are considered. Two X-ray luminosity thresholds, $L_{\rm X}^*(M_{\rm{V}}=-7)=10^{33.05}$ erg/s and $L_{\rm X}^*(M_{\rm{V}}=-7)=10^{32.01}$ erg/s, yield the most reliable distinction. In contrast to earlier findings based solely on optical data, our results demonstrate that globular clusters with the highest X-ray luminosity tend to have higher ellipticity on average. |
| title | On the relationship between the ellipticity of Galactic globular clusters and their X-ray luminosity |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2604.16168 |