MUSEQuBES: Calibrating the redshifts of Ly {\alpha} emitters using stacked circumgalactic medium absorption profiles

29 Sep 2020 Muzahid Sowgat AIP, Potsdam Schaye Joop Marino Raffaella Anna Cantalupo Sebastiano Brinchmann Jarle Contini Thierry Wendt Martin Wisotzki Lutz Zabl Johannes Bouché Nicolas Akhlaghi Mohammad Chen Hsiao-Wen Claeyssens Adélaide Johnson Sean Leclercq Floriane Maseda Michael Matthee Jorryt Richard Johan Urrutia Tanya Verhamme Anne

Lyman$-\alpha$ (Ly$\alpha$) emission lines are typically found to be redshifted with respect to the systemic redshifts of galaxies, likely due to resonant scattering of Ly$\alpha$ photons. Here we measure the average velocity offset for a sample of 96 $z\approx3.3$ Ly$\alpha$ emitters (LAEs) with a median Ly$\alpha$ flux (luminosity) of $\approx 10^{-17}~\rm erg~cm^{-2}~s^{-1}$ ($\approx10^{42}~\rm erg~s^{-1}$) and a median star formation rate (SFR) of $\approx1.3 \rm M_{\odot} yr^{-1}$ (not corrected for possible dust extinction), detected by the Multi-Unit Spectroscopic Explorer as part of our MUSEQuBES circumgalactic medium (CGM) survey... (read more)

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