Edge-on galaxies in the HST COSMOS field: the evolution of stellar discs up to z$\sim$0.5
Fuente:
arXiv
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866917564463972352 |
|---|---|
| author | Usachev, P. A. Reshetnikov, V. P. Savchenko, S. S. |
| author_facet | Usachev, P. A. Reshetnikov, V. P. Savchenko, S. S. |
| contents | We present a sample of 950 edge-on spiral galaxies found with the use of an artificial neural network in the Hubble Space Telescope COSMOS field. This is currently the largest sample of distant edge-on galaxies. For all galaxies we analyzed the 2D brightness distributions in the F814W filter and measured the radial and vertical exponential scales ($h$ and $h_z$ correspondingly) of the brightness distribution. By comparing the characteristics of distant galaxies with those of nearby objects, we conclude that thin stellar discs with $h/h_z \geq 10$ at $z \approx 0.5$ should be rarer than today. Both exponential scales of the stellar disc show evidence of luminosity-dependent evolution: in faint galaxies the $h$ and $h_z$ values do not change with $z$, in bright (and massive) spiral galaxies both scales, on average, grow towards our epoch. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_05852 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Edge-on galaxies in the HST COSMOS field: the evolution of stellar discs up to z$\sim$0.5 Usachev, P. A. Reshetnikov, V. P. Savchenko, S. S. Astrophysics of Galaxies We present a sample of 950 edge-on spiral galaxies found with the use of an artificial neural network in the Hubble Space Telescope COSMOS field. This is currently the largest sample of distant edge-on galaxies. For all galaxies we analyzed the 2D brightness distributions in the F814W filter and measured the radial and vertical exponential scales ($h$ and $h_z$ correspondingly) of the brightness distribution. By comparing the characteristics of distant galaxies with those of nearby objects, we conclude that thin stellar discs with $h/h_z \geq 10$ at $z \approx 0.5$ should be rarer than today. Both exponential scales of the stellar disc show evidence of luminosity-dependent evolution: in faint galaxies the $h$ and $h_z$ values do not change with $z$, in bright (and massive) spiral galaxies both scales, on average, grow towards our epoch. |
| title | Edge-on galaxies in the HST COSMOS field: the evolution of stellar discs up to z$\sim$0.5 |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2401.05852 |