Revisiting the structure of galactic disks with deep imaging
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866908762186448896 |
|---|---|
| author | Raji, Samane Trujillo, Ignacio Buitrago, Fernando Golini, Giulia Cejudo, Ignacio Ruiz |
| author_facet | Raji, Samane Trujillo, Ignacio Buitrago, Fernando Golini, Giulia Cejudo, Ignacio Ruiz |
| contents | Thanks to new advances in astronomical imaging, we can now routinely explore disk galaxy profiles about two magnitudes deeper than the data available 20 years ago. In this regard, it is an opportune time to reevaluate the past classifications of different surface brightness Types. In this paper, we explore the stellar mass profiles of a sample of disk galaxies with similar stellar masses ($\sim$10$^{10}$ M$_{\odot}$) using IAC Stripe82 Legacy Project data. We find that Type I, II-CT, and III-d galaxies exhibit edges at surface brightnesses $μ_g$(R$_{edge}$)$\sim$26.5 mag/arcsec$^2$ and surface mass densities $Σ$(R$_{edge}$)$\sim$0.5-1 M$_{\odot}$/pc$^2$. These surface brightnesses were outside the range of typical SDSS images and, therefore, unstudied. The present data suggest (although the statistics are inconclusive) that the main difference between the previous profile Types is the presence of either a more or a less intense bulge. Half of the Type II-CT galaxies are Sc, whereas half of the Type III-d galaxies are Sb. Finally, Type III-d galaxies have low mass surface density disks ($Σ$($Δ$ $R_{\mathrm{exp}}$)$\sim$0.5 M$_{\odot}$/pc$^2$) and are bluer $(g-r)_0$=0.32$\pm$0.02 than the other Types ($(g-r)_0$=0.42$\pm$0.02 for Type I and II-CT), suggesting that their disks probably formed later in time. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_24900 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Revisiting the structure of galactic disks with deep imaging Raji, Samane Trujillo, Ignacio Buitrago, Fernando Golini, Giulia Cejudo, Ignacio Ruiz Astrophysics of Galaxies Thanks to new advances in astronomical imaging, we can now routinely explore disk galaxy profiles about two magnitudes deeper than the data available 20 years ago. In this regard, it is an opportune time to reevaluate the past classifications of different surface brightness Types. In this paper, we explore the stellar mass profiles of a sample of disk galaxies with similar stellar masses ($\sim$10$^{10}$ M$_{\odot}$) using IAC Stripe82 Legacy Project data. We find that Type I, II-CT, and III-d galaxies exhibit edges at surface brightnesses $μ_g$(R$_{edge}$)$\sim$26.5 mag/arcsec$^2$ and surface mass densities $Σ$(R$_{edge}$)$\sim$0.5-1 M$_{\odot}$/pc$^2$. These surface brightnesses were outside the range of typical SDSS images and, therefore, unstudied. The present data suggest (although the statistics are inconclusive) that the main difference between the previous profile Types is the presence of either a more or a less intense bulge. Half of the Type II-CT galaxies are Sc, whereas half of the Type III-d galaxies are Sb. Finally, Type III-d galaxies have low mass surface density disks ($Σ$($Δ$ $R_{\mathrm{exp}}$)$\sim$0.5 M$_{\odot}$/pc$^2$) and are bluer $(g-r)_0$=0.32$\pm$0.02 than the other Types ($(g-r)_0$=0.42$\pm$0.02 for Type I and II-CT), suggesting that their disks probably formed later in time. |
| title | Revisiting the structure of galactic disks with deep imaging |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2510.24900 |