Stellar populations, stellar masses and the formation of galaxy bulges and discs at z < 3 in CANDELS
We present a multi-component structural analysis of the internal structure of 1074 high redshift massive galaxies at 1 < z < 3 from the CANDELS HST Survey. In particular we examine galaxies best-fit by two structural components, and thus likely forming discs and bulges. We examine the stellar...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Published: |
Oxford University Press
2018
|
| Subjects: | |
| Online Access: | https://eprints.nottingham.ac.uk/51777/ |
| _version_ | 1848798573087424512 |
|---|---|
| author | Margalef-Bentabol, Berta Conselice, Christopher J. Mortlock, Alice Hartley, Will Duncan, Kenneth Kennedy, Rebecca Kocevski, Dale D. Hasinger, Guenther |
| author_facet | Margalef-Bentabol, Berta Conselice, Christopher J. Mortlock, Alice Hartley, Will Duncan, Kenneth Kennedy, Rebecca Kocevski, Dale D. Hasinger, Guenther |
| author_sort | Margalef-Bentabol, Berta |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | We present a multi-component structural analysis of the internal structure of 1074 high redshift massive galaxies at 1 < z < 3 from the CANDELS HST Survey. In particular we examine galaxies best-fit by two structural components, and thus likely forming discs and bulges. We examine the stellar mass, star formation rates, and colours of both the inner ‘bulge’ and outer ‘disc’ components for these systems using SED information from the resolved ACS+WFC3 HST imaging. We find that the majority of both inner and outer components lie in the star-forming region of UVJ space (68 and 90 per cent respectively). However, the inner portions, or the likely forming bulges, are dominated by dusty star formation. Furthermore, we show that the outer components of these systems have a higher star formation rate than their inner regions, and the ratio of star formation rate between ‘disc’ and ‘bulge’ increases at lower redshifts. Despite the higher star formation rate of the outer component, the stellar mass ratio of inner to outer component remains constant through this epoch. This suggests that there is mass transfer from the outer to inner components for typical two component forming systems, thus building bulges from disks. Finally, using Chandra data we find that the presence of an AGN is more common in both 1-component spheroid-like galaxies and 2-component systems (13 +- 3 and 11 +- 2 per cent) than in 1-component disc-like galaxies (3 +- 1 per cent), demonstrating that the formation of a central inner-component likely triggers the formation of central massive black holes in these galaxies. |
| first_indexed | 2025-11-14T20:21:55Z |
| format | Article |
| id | nottingham-51777 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T20:21:55Z |
| publishDate | 2018 |
| publisher | Oxford University Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-517772020-04-29T16:00:58Z https://eprints.nottingham.ac.uk/51777/ Stellar populations, stellar masses and the formation of galaxy bulges and discs at z < 3 in CANDELS Margalef-Bentabol, Berta Conselice, Christopher J. Mortlock, Alice Hartley, Will Duncan, Kenneth Kennedy, Rebecca Kocevski, Dale D. Hasinger, Guenther We present a multi-component structural analysis of the internal structure of 1074 high redshift massive galaxies at 1 < z < 3 from the CANDELS HST Survey. In particular we examine galaxies best-fit by two structural components, and thus likely forming discs and bulges. We examine the stellar mass, star formation rates, and colours of both the inner ‘bulge’ and outer ‘disc’ components for these systems using SED information from the resolved ACS+WFC3 HST imaging. We find that the majority of both inner and outer components lie in the star-forming region of UVJ space (68 and 90 per cent respectively). However, the inner portions, or the likely forming bulges, are dominated by dusty star formation. Furthermore, we show that the outer components of these systems have a higher star formation rate than their inner regions, and the ratio of star formation rate between ‘disc’ and ‘bulge’ increases at lower redshifts. Despite the higher star formation rate of the outer component, the stellar mass ratio of inner to outer component remains constant through this epoch. This suggests that there is mass transfer from the outer to inner components for typical two component forming systems, thus building bulges from disks. Finally, using Chandra data we find that the presence of an AGN is more common in both 1-component spheroid-like galaxies and 2-component systems (13 +- 3 and 11 +- 2 per cent) than in 1-component disc-like galaxies (3 +- 1 per cent), demonstrating that the formation of a central inner-component likely triggers the formation of central massive black holes in these galaxies. Oxford University Press 2018-02-01 Article PeerReviewed Margalef-Bentabol, Berta, Conselice, Christopher J., Mortlock, Alice, Hartley, Will, Duncan, Kenneth, Kennedy, Rebecca, Kocevski, Dale D. and Hasinger, Guenther (2018) Stellar populations, stellar masses and the formation of galaxy bulges and discs at z < 3 in CANDELS. Monthly Notices of the Royal Astronomical Society, 473 (4). pp. 5370-5384. ISSN 1365-2966 galaxies: evolution ; galaxies: high-redshift ; galaxies: structure. https://doi.org/10.1093/mnras/stx2633 doi:10.1093/mnras/stx2633 doi:10.1093/mnras/stx2633 |
| spellingShingle | galaxies: evolution ; galaxies: high-redshift ; galaxies: structure. Margalef-Bentabol, Berta Conselice, Christopher J. Mortlock, Alice Hartley, Will Duncan, Kenneth Kennedy, Rebecca Kocevski, Dale D. Hasinger, Guenther Stellar populations, stellar masses and the formation of galaxy bulges and discs at z < 3 in CANDELS |
| title | Stellar populations, stellar masses and the formation of galaxy bulges and discs at z < 3 in CANDELS |
| title_full | Stellar populations, stellar masses and the formation of galaxy bulges and discs at z < 3 in CANDELS |
| title_fullStr | Stellar populations, stellar masses and the formation of galaxy bulges and discs at z < 3 in CANDELS |
| title_full_unstemmed | Stellar populations, stellar masses and the formation of galaxy bulges and discs at z < 3 in CANDELS |
| title_short | Stellar populations, stellar masses and the formation of galaxy bulges and discs at z < 3 in CANDELS |
| title_sort | stellar populations, stellar masses and the formation of galaxy bulges and discs at z < 3 in candels |
| topic | galaxies: evolution ; galaxies: high-redshift ; galaxies: structure. |
| url | https://eprints.nottingham.ac.uk/51777/ https://eprints.nottingham.ac.uk/51777/ https://eprints.nottingham.ac.uk/51777/ |