The MUSE Ultra Deep Field (MUDF) - I. Discovery of a group of Lyα nebulae associated with a bright z ≈ 3.23 quasar pair
| Autor: | Tom Theuns, Simon L. Morris, Michele Fumagalli, Robert A. Simcoe, Stefano Cristiani, L. J. Prichard, Matteo Fossati, Sebastiano Cantalupo, Rich Bielby, Francesco Haardt, Emma K. Lofthouse, A. M. Swinbank, F. Arrigoni Battaia, Pratika Dayal, Ruari Mackenzie, Marc Rafelski, Ryan Cooke, Elisabeta Lusso, Valentina D'Odorico, Celine Peroux |
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| Přispěvatelé: | ITA, USA, GBR, FRA, DEU, NLD, CHE, Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Lusso, E, Fumagalli, M, Fossati, M, Mackenzie, R, Bielby, R, Battaia, F, Cantalupo, S, Cooke, R, Cristiani, S, Dayal, P, D’Odorico, V, Haardt, F, Lofthouse, E, Morris, S, Peroux, C, Prichard, L, Rafelski, M, Simcoe, R, Swinbank, M, Theuns, T, Astronomy |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Astrophysics::High Energy Astrophysical Phenomena
Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences galaxies: haloe RARE galaxies: high-redshift quasars: general 0103 physical sciences Field spectroscopy Astrophysics::Solar and Stellar Astrophysics COSMIC WEB galaxies: formation Surface brightness 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics Physics Very Large Telescope Nebula 010308 nuclear & particles physics Astronomy and Astrophysics Quasar Multi Unit Spectroscopic Explorer Hubble Ultra-Deep Field Astrophysics - Astrophysics of Galaxies Galaxy GALAXIES galaxies: haloes 13. Climate action Space and Planetary Science GAS [SDU]Sciences of the Universe [physics] intergalactic medium large-scale structure of Universe EMISSION |
| Zdroj: | Monthly Notices of the Royal Astronomical Society: Letters Monthly Notices of the Royal Astronomical Society: Letters, 2019, 485, pp.L62-L67. ⟨10.1093/mnrasl/slz032⟩ Monthly Notices of the Royal Astronomical Society, 485(1), L62-L67. Oxford University Press arXiv Monthly notices of the Royal Astronomical Society : letters, 2019, Vol.485(1), pp.L62-L67 [Peer Reviewed Journal] |
| ISSN: | 1745-3933 0035-8711 |
| Popis: | We present first results from Multi Unit Spectroscopic Explorer (MUSE) observations at the Very Large Telescope in the MUSE Ultra Deep Field (MUDF), a $\approx 1.2\times 1.4$ arcmin$^2$ region for which we are collecting $\approx$200 hours of integral field spectroscopy. The $\approx 40$-hour observation completed to date reveals the presence of a group of three Ly$\alpha$ nebulae associated with a bright quasar pair at $z\simeq3.23$ with projected separation of $\approx 500\rm~kpc$. Two of the nebulae are physically associated with the quasars which are likely powering the Ly$\alpha$ emission, and extend for $\gtrsim 100~\rm kpc$ at a surface brightness level of $\approx 6\times 10^{-19}~\rm erg~s^{-1}~cm^{-2}~arcsec^{-2}$. A third smaller ($\approx$35 kpc) nebula lies at a velocity offset of $\approx 1550$ km s$^{-1}$. Despite their clustered nature, the two large nebulae have properties similar to those observed in isolated quasars and exhibit no sharp decline in flux at the current depth, suggesting an even more extended distribution of gas around the quasars. We interpret the shape and the alignment of the two brighter nebulae as suggestive of the presence of an extended structure connecting the two quasar host galaxies, as seen for massive galaxies forming within gas-rich filaments in cosmological simulations. Comment: MNRAS Letters in press, 3 figures, revised version: minor changes following proofs |
| Databáze: | OpenAIRE |
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