Deep HST/UVIS imaging of the candidate dark galaxy CDG-1
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866913357962936320 |
|---|---|
| author | van Dokkum, Pieter Li, Dayi David Abraham, Roberto Danieli, Shany Eadie, Gwendolyn M. Harris, William E. Romanowsky, Aaron J. |
| author_facet | van Dokkum, Pieter Li, Dayi David Abraham, Roberto Danieli, Shany Eadie, Gwendolyn M. Harris, William E. Romanowsky, Aaron J. |
| contents | CDG-1 is a tight grouping of four likely globular clusters in the Perseus cluster, and a candidate dark galaxy with little or no diffuse light. Here we provide new constraints on the luminosity of any underlying stellar emission, using HST/UVIS F200LP imaging. No diffuse emission is detected, with a 2$σ$ upper limit of F200LP>28.1 mag/arcsec$^2$ on the 5'' scale of CDG-1. This surface brightness limit corresponds to a 2$σ$ lower limit of >0.5 for the fraction of the total luminosity that is in the form of globular clusters. The most likely alternative, although improbable, is that CDG-1 is a chance grouping of four globular clusters in the halo of the Perseus galaxy IC312. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_12907 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Deep HST/UVIS imaging of the candidate dark galaxy CDG-1 van Dokkum, Pieter Li, Dayi David Abraham, Roberto Danieli, Shany Eadie, Gwendolyn M. Harris, William E. Romanowsky, Aaron J. Astrophysics of Galaxies CDG-1 is a tight grouping of four likely globular clusters in the Perseus cluster, and a candidate dark galaxy with little or no diffuse light. Here we provide new constraints on the luminosity of any underlying stellar emission, using HST/UVIS F200LP imaging. No diffuse emission is detected, with a 2$σ$ upper limit of F200LP>28.1 mag/arcsec$^2$ on the 5'' scale of CDG-1. This surface brightness limit corresponds to a 2$σ$ lower limit of >0.5 for the fraction of the total luminosity that is in the form of globular clusters. The most likely alternative, although improbable, is that CDG-1 is a chance grouping of four globular clusters in the halo of the Perseus galaxy IC312. |
| title | Deep HST/UVIS imaging of the candidate dark galaxy CDG-1 |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2405.12907 |