A search for lensed Lyα emitters within the early HETDEX data set

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

doi:10.3847/1538-4357/ac9186

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A search for lensed Lyα emitters within the early HETDEX data set

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Farrow, Daniel
Optical and Interpretative Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

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引用

Laseter, I. H., Finkelstein, S. L., Bagley, M. J., Davis, D. M., Gebhardt, K., Gronwall, C., Ciardullo, R., Zeimann, G. R., Cooper, E. M., & Farrow, D. (2022). A search for lensed Lyα emitters within the early HETDEX data set. The Astrophysical Journal, 940(1):. doi:10.3847/1538-4357/ac9186.

引用: https://hdl.handle.net/21.11116/0000-000C-A408-2

要旨

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.