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LESSER: a catalogue of spectroscopically selected sample of Lyman-α emitters lensed by galaxies

Abstract : We introduce the LEnSed laeS in the Eboss suRvey (LESSER) project, which aims to search for lensed Lyman-α emitters (LAEs) in the Extended Baryon Oscillation Spectroscopic Survey (eBOSS). The final catalogue contains 361 candidate lensing systems. The lens galaxies are luminous red galaxies (LRGs) at redshift 0.4 < z < 0.8, and the source galaxies are LAEs at redshift 2 < z < 3. The spectral resolution of eBOSS (∼2000) allows us to further identify the fine structures of Lyman-α ( $\rm Ly\alpha$ ) emissions. Among our lensed LAE candidates, 281 systems present single-peaked line profiles while 80 systems show double-peaked features. Future spectroscopic/imaging follow-up observations of the catalogue may shed light on the origin of diverse $\rm Ly\alpha$ line morphology, and provide promising labs for studying low-mass dark matter haloes/subhaloes.
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https://hal-insu.archives-ouvertes.fr/insu-03667032
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Submitted on : Friday, May 13, 2022 - 9:39:42 AM
Last modification on : Thursday, November 24, 2022 - 5:02:58 PM

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Xiaoyue Cao, Ran Li, Yiping Shu, Shude Mao, Jean-Paul Kneib, et al.. LESSER: a catalogue of spectroscopically selected sample of Lyman-α emitters lensed by galaxies. Monthly Notices of the Royal Astronomical Society, 2020, 499, pp.3610-3619. ⟨10.1093/mnras/staa3058⟩. ⟨insu-03667032⟩

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