The MUSE Ultra Deep Field (MUDF). I. Discovery of a group of Ly$\alpha$ nebulae associated with a bright $z\approx 3.23$ quasar pair

12 Mar 2019 • Lusso E. Durham-CEA • Fumagalli M. • Fossati M. • Mackenzie R. • Bielby R. M. • Battaia F. Arrigoni • 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 A. M. • Theuns T.

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 $\approx 500\rm~kpc$... (read more)

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The MUSE Ultra Deep Field (MUDF). I. Discovery of a group of Ly$\alpha$ nebulae associated with a bright $z\approx 3.23$ quasar pair

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