The ALPINE-ALMA [CII] Survey: A Triple Merger at z ~ 4.56
| dc.contributor.author | Ibar, Eduardo | |
| dc.date.accessioned | 2021-07-22T17:11:24Z | |
| dc.date.available | 2021-07-22T17:11:24Z | |
| dc.date.issued | 2020 | |
| dc.description.abstract | We report the detection of [C II] λ158 μm emission from a system of three closely separated sources in the Cosmic Evolution Survey (COSMOS) field at z ∼ 4.56 , as part of the Atacama Large Millimeter/submillimeter Array (ALMA) Large Program to INvestigate C II at Early times (ALPINE). The two most luminous sources are closely associated, both spatially (1.6 arcsec ∼ 11 kpc) and in velocity (∼100 km s−1), while the third source is slightly more distant (2.8 arcsec ∼ 18 kpc, ∼300 km s−1). The second most luminous source features a slight velocity gradient, while no significant velocity gradient is seen in the other two sources. Using the observed [C II] luminosities, we derive a total log10(SFR[CII][M⊙yr−1])=2.8±0.2, which may be split into contributions of 59, 31, and 10 per cent from the central, east, and west sources, respectively. Comparison of these [C II] detections to recent zoom-in cosmological simulations suggests an ongoing major merger. We are thus witnessing a system in a major phase of mass build-up by merging, including an ongoing major merger and an upcoming minor merger, which is expected to end up in a single massive galaxy by z ∼ 2.5. | en_ES |
| dc.identifier.doi | https://doi.org/10.1093/mnrasl/slz154 | |
| dc.identifier.uri | http://repositoriobibliotecas.uv.cl/handle/uvscl/2148 | |
| dc.language.iso | en | en_ES |
| dc.publisher | Royal Astronomical Society | en_ES |
| dc.source | Monthly Notices of the Royal Astronomical Society: Letters | en_ES |
| dc.subject | GALAXIES: EVOLUTION | en_ES |
| dc.subject | GALAXIES: HIGH-REDSHIFT | en_ES |
| dc.subject | GALAXIES: INTERACTIONS | en_ES |
| dc.subject | GALAXIES: KINEMATICS AND DYNAMICS | en_ES |
| dc.title | The ALPINE-ALMA [CII] Survey: A Triple Merger at z ~ 4.56 | en_ES |
| dc.type | Articulo | en_ES |
| uv.catalogador | RCR DIBRA | en_ES |
| uv.notageneral | Varios autores | en_ES |