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Título: | The discovery of the most UV-Ly α luminous star-forming galaxy: a young, dust- And metal-poor starburst with QSO-like luminosities |
Autor: | Marques-Chaves, Rui; Álvarez-Márquez, J.; Colina, Luis CSIC ORCID; Pèrez-Fournon, Ismael; Schaerer, D.; Dalla Vecchia, C.; Hashimoto, T.; Jiménez-Ángel, C.; Shu, Y. | Fecha de publicación: | 2020 | Citación: | Monthly Notices of the Royal Astronomical Society: Letters 499: L105- L110 (2020) | Resumen: | We report the discovery of BOSS-EUVLG1 at z = 2.469, by far the most luminous, almost un-obscured star-forming galaxy known at any redshift. First classified as a QSO within the Baryon Oscillation Spectroscopic Survey, follow-up observations with the Gran Telescopio Canarias reveal that its large luminosity, MUV ≃ -24.40 and log(LLyα/erg s-1) ≃ 44.0, is due to an intense burst of star formation, and not to an active galactic nucleus or gravitational lensing. BOSS-EUVLG1 is a compact (reff ≃ 1.2 kpc), young (4-5 Myr) starburst with a stellar mass log(Mz.ast;/M) = 10.0-0.1 and a prodigious star formation rate of ≃1000 M yr-1. However, it is metal- and dust-poor [12 + log(O/H) = 8.13 ± 0.19, E(B - V) ≃ 0.07, log(LIR/LUV) < -1.2], indicating that we are witnessing the very early phase of an intense starburst that has had no time to enrich the ISM. BOSS-EUVLG1 might represent a short-lived (<100 Myr), yet important phase of star-forming galaxies at high redshift that has been missed in previous surveys. Within a galaxy evolutionary scheme, BOSS-EUVLG1 could likely represent the very initial phases in the evolution of massive quiescent galaxies, even before the dusty star-forming phase. | Versión del editor: | http://dx.doi.org/10.1093/mnrasl/slaa160 | URI: | http://hdl.handle.net/10261/234361 | DOI: | 10.1093/mnrasl/slaa160 | Identificadores: | doi: 10.1093/mnrasl/slaa160 issn: 1745-3933 |
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