A kpc-scale resolved study of unobscured and obscured star-formation activity in normal galaxies at z = 1.5 and 2.2 from ALMA and HiZELS
| dc.contributor.author | Cheng, Cheng | |
| dc.contributor.author | Ibar, Eduardo | |
| dc.contributor.author | Hughes, Thomas | |
| dc.date.accessioned | 2021-07-28T19:41:03Z | |
| dc.date.available | 2021-07-28T19:41:03Z | |
| dc.date.issued | 2020 | |
| dc.description.abstract | We present Atacama Large Millimeter/Submillimeter Array (ALMA) continuum observations of a sample of nine star-forming galaxies at redshifts 1.47 and 2.23 selected from the High-z Emission Line Survey (HiZELS). Four galaxies in our sample are detected at high significance by ALMA at a resolution of 0′′.25 at rest-frame 355 μm. Together with the previously observed H α emission, from adaptive optics-assisted integral-field-unit spectroscopy (∼0′′.15 resolution), and F606W and F140W imaging from the Hubble Space Telescope (∼0′′.2 resolution), we study the star formation activity, stellar and dust mass in these high-redshift galaxies at ∼kpc-scale resolution. We find that ALMA detection rates are higher for more massive galaxies (M* > 1010.5 M⊙) and higher [N II]/H α ratios (>0.25, a proxy for gas-phase metallicity). The dust extends out to a radius of 8 kpc, with a smooth structure, even for those galaxies presenting clumpy H α morphologies. The half-light radii (Rdust) derived for the detected galaxies are of the order ∼4.5 kpc, more than twice the size of submillimetre-selected galaxies at a similar redshift. Our global star formation rate estimates – from far-infrared and extinction-corrected H α luminosities – are in good agreement. However, the different morphologies of the different phases of the interstellar medium suggest complex extinction properties of the high-redshift normal galaxies. | en_ES |
| dc.identifier.doi | https://doi.org/10.1093/mnras/staa3036 | |
| dc.identifier.uri | http://repositoriobibliotecas.uv.cl/handle/uvscl/2222 | |
| dc.language.iso | en | en_ES |
| dc.publisher | Royal Astronomical Society | en_ES |
| dc.source | Monthly Notices of the Royal Astronomical Society | en_ES |
| dc.subject | GALAXIES: ISM | en_ES |
| dc.subject | SUBMILLIMETER: GALAXIES | en_ES |
| dc.subject | GALAXIES: STARBURST | en_ES |
| dc.subject | GALAXIES: STAR FORMATION | en_ES |
| dc.title | A kpc-scale resolved study of unobscured and obscured star-formation activity in normal galaxies at z = 1.5 and 2.2 from ALMA and HiZELS | en_ES |
| dc.type | Articulo | en_ES |
| uv.catalogador | RCR DIBRA | en_ES |
| uv.notageneral | Varios autores | en_ES |