A Search for Lensed Lyα Emitters within the Early HETDEX Data Set

Isaac H. Laseter, Steven L. Finkelstein, Micaela J. Bagley, Dustin M. Davis, Karl Gebhardt, Caryl Gronwall, Robin Ciardullo, Gregory R. Zeimann, Erin Mentuch Cooper, Daniel Farrow

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1 Scopus citations


The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) is a large-volume spectroscopic survey without preselection of sources, searching ∼540 deg2 for Lyα emitting galaxies (LAEs) at 1.9 < z < 3.5. Taking advantage of such a wide-volume survey, we perform a pilot study using early HETDEX data to search for lensed Lyα emitters (LAEs). After performing a proof of concept using a previously known lensed LAE covered by HETDEX, we perform a search for previously unknown lensed LAEs in the HETDEX spectroscopic sample. We present a catalog of 26 potential LAEs lensed by foreground, red, non-star-forming galaxies at z ∼ 0.4-0.7. We estimate the magnification for each candidate system, finding 12 candidates to be within the strong lensing regime (magnification μ > 2). Follow-up observations of these potential lensed LAEs have the potential to confirm their lensed nature and explore these distant galaxies in more detail.

Original languageEnglish (US)
Article number9
JournalAstrophysical Journal
Issue number1
StatePublished - Nov 1 2022

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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