The ALPINE–ALMA [CII] Survey: Size of Individual Star-forming Galaxies at z = 4–6 and Their Extended Halo Structure
| dc.contributor.author | Ibar, Eduardo | |
| dc.contributor.author | Mendez Hernandez, Hugo | |
| dc.date.accessioned | 2021-07-28T15:05:33Z | |
| dc.date.available | 2021-07-28T15:05:33Z | |
| dc.date.issued | 2020 | |
| dc.description.abstract | We present the physical extent of [C ii] 158 μm line-emitting gas from 46 star-forming galaxies at z = 4–6 from the ALMA Large Program to INvestigate C ii at Early Times (ALPINE). Using exponential profile fits, we measure the effective radius of the [C ii] line (${r}_{{\rm{e}},[{\rm{C}}{\rm\small{II}}]}$) for individual galaxies and compare them with the rest-frame ultraviolet (UV) continuum (${r}_{{\rm{e}},\mathrm{UV}}$) from Hubble Space Telescope images. The effective radius ${r}_{{\rm{e}},[{\rm{C}}{\rm\small{II}}]}$ exceeds ${r}_{{\rm{e}},\mathrm{UV}}$ by factors of ~2–3, and the ratio of ${r}_{{\rm{e}},[{\rm{C}}{\rm\small{II}}]}/{r}_{{\rm{e}},\mathrm{UV}}$ increases as a function of Mstar. We do not find strong evidence that the [C ii] line, rest-frame UV, and far-infrared (FIR) continuum are always displaced over sime1 kpc scale from each other. We identify 30% of isolated ALPINE sources as having an extended [C ii] component over 10 kpc scales detected at 4.1σ–10.9σ beyond the size of rest-frame UV and FIR continuum. One object has tentative rotating features up to ~10 kpc, where the 3D model fit shows the rotating [C ii]-gas disk spread over 4 times larger than the rest-frame UV-emitting region. Galaxies with the extended [C ii] line structure have high star formation rate, high stellar mass (Mstar), low Lyα equivalent width, and more blueshifted (redshifted) rest-frame UV metal absorption (Lyα line), as compared to galaxies without such extended [C ii] structures. Although we cannot rule out the possibility that a selection bias toward luminous objects may be responsible for such trends, the star-formation-driven outflow also explains all these trends. Deeper observations are essential to test whether the extended [C ii] line structures are ubiquitous to high-z star-forming galaxies. | en_ES |
| dc.identifier.doi | https://doi.org/10.3847/1538-4357/ab94b3 | |
| dc.identifier.uri | http://repositoriobibliotecas.uv.cl/handle/uvscl/2212 | |
| dc.language.iso | en | en_ES |
| dc.publisher | American Astronomical Society | en_ES |
| dc.source | The Astrophysical Journal | en_ES |
| dc.subject | GALAXY EVOLUTION | en_ES |
| dc.subject | GALAXY FORMATION | en_ES |
| dc.subject | CIRCUMGALACTIC MEDIUM | en_ES |
| dc.subject | INTERSTELLAR MEDIUM | en_ES |
| dc.title | The ALPINE–ALMA [CII] Survey: Size of Individual Star-forming Galaxies at z = 4–6 and Their Extended Halo Structure | en_ES |
| dc.type | Articulo | en_ES |
| uv.catalogador | RCR DIBRA | en_ES |
| uv.notageneral | Varios autores | en_ES |