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.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- December 2020
- DOI:
- 10.1093/mnras/staa3058
- arXiv:
- arXiv:2008.01361
- Bibcode:
- 2020MNRAS.499.3610C
- Keywords:
-
- gravitational lensing: strong;
- techniques: spectroscopic;
- galaxies: elliptical and lenticular;
- cD;
- dark matter;
- Astrophysics - Astrophysics of Galaxies
- E-Print:
- 11 Pages, 9 figures, 2 tables, accepted by MNRAS. For catalog data, see https://github.com/caoxiaoyue/search_lensed_laes/tree/master/paper_material/catalog