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The Magellan Evolution of Galaxies Spectroscopic and Ultraviolet Reference Atlas (MegaSaura). II. Stacked Spectra

Rigby, J R; Bayliss, Matthew B; Chisholm, John P; Bordoloi, Rongmon; Sharon, Keren; Gladders, Michael D; Johnson, Traci; Paterno-Mahler, Rachel; Wuyts, Eva; Dahle, Hakon; Acharyya, Ayan


We stack the rest-frame ultraviolet spectra of N = 14 highly magnified gravitationally lensed galaxies at redshifts . The resulting new composite spans Å, with a peak signal-to-noise ratio (S/N) of 103 per spectral resolution element (∼100 km s-1). It is the highest S/N, highest spectral resolution composite spectrum of z ∼ 2-3 galaxies yet published. The composite reveals numerous weak nebular emission lines and stellar photospheric absorption lines that can serve as new physical diagnostics,...[Show more]

CollectionsANU Research Publications
Date published: 2018
Type: Journal article
Source: The Astrophysical Journal
DOI: 10.3847/1538-4357/aaa2fc


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