LESSER: A Catalogue of Spectroscopically selected sample of Lyman-$\alpha$ Emitters Lensed By Galaxies

Abstract

We introduce the LEnSed laeS in the Eboss suRvey (LESSER) project, which aims to search for lensed Lyman-$\alpha$ Emitters (LAEs) in the Extended Baryon Oscillation Spectroscopic Survey (eBOSS). The final catalog 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 ($\sim$2000) allows us to further identify the fine structures of Lyman-$\alpha$ ($\mathrm{Ly}\alpha$) 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 catalog may shed light on the origin of diverse $\mathrm{Ly}\alpha$ line morphology, and provide promising labs for studying low mass dark matter haloes/subhaloes.

arXiv comment11 Pages, 9 figures, 2 tables, accepted by MNRAS. For catalog data, see https://github.com/caoxiaoyue/search_lensed_laes/tree/master/paper_material/catalog ; For spectra images, see https://github.com/caoxiaoyue/search_lensed_laes/tree/master/paper_material/combine_spectra ; For Lens images, see https://github.com/caoxiaoyue/search_lensed_laes/tree/master/paper_material/image_stamp

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