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http://hdl.handle.net/20.500.12386/31226
Titolo: | Observations of [OI]63-=μm line emission in main-sequence galaxies at z ∼ 1.5 | Autori: | Wagg, J. Aravena, M. Brisbin, D. Valtchanov, I. Carilli, C. Daddi, E. Dannerbauer, H. DECARLI, ROBERTO Díaz-Santos, T. Riechers, D. Sargent, M. Walter, F. |
Data pubblicazione: | 2020 | Rivista: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Numero: | 499 | Fascicolo: | 2 | Da pagina:: | 1788 | Abstract: | We present Herschel-PACS spectroscopy of four main-sequence star-forming galaxies at z ∼ 1.5. We detect [OI]63-=μm line emission in BzK-21000 at z = 1.5213, and measure a line luminosity, $L_{\rm [O\, {\small I}]63\, \mu m} = (3.9\pm 0.7)\times 10^9$ -=L<SUB>⊙</SUB>. Our PDR modelling of the interstellar medium in BzK-21000 suggests a UV radiation field strength, G ∼ 320G<SUB>0</SUB>, and gas density, n ∼ 1800-=cm<SUP>-3</SUP>, consistent with previous LVG modelling of the molecular CO line excitation. The other three targets in our sample are individually undetected in these data, and we perform a spectral stacking analysis which yields a detection of their average emission and an [O-=I]63-=μm line luminosity, $L_{\rm [O\, {\small I}]63\, \mu m} = (1.1\pm 0.2)\times 10^9$ -=L<SUB>⊙</SUB>. We find that the implied luminosity ratio, $L_{\rm [O\, {\small I}]63\, \mu m}/L_{\rm IR}$ , of the undetected BzK-selected star-forming galaxies broadly agrees with that of low-redshift star-forming galaxies, while BzK-21000 has a similar ratio to that of a dusty star-forming galaxy at z ∼ 6. The high [O-=I]63-=μm line luminosities observed in BzK-21000 and the z ∼ 1-3 dusty and sub-mm luminous star-forming galaxies may be associated with extended reservoirs of low density, cool neutral gas. | URI: | http://hdl.handle.net/20.500.12386/31226 | URL: | https://academic.oup.com/mnras/article/499/2/1788/5909056 http://arxiv.org/abs/2009.08984v1 |
ISSN: | 0035-8711 | DOI: | 10.1093/mnras/staa2884 | Bibcode ADS: | 2020MNRAS.499.1788W | Fulltext: | open |
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