COOL-LAMPS VI: Lens model and New Constraints on the Properties of COOL J1241+2219, a Bright z = 5 Lyman Break Galaxy and its z = 1 Cluster Lens

We present a strong lensing analysis of COOL J1241+2219, the brightest known gravitationally lensed galaxy at \(z \geq 5\), based on new multi-band Hubble Space Telescope (HST) imaging data. The lensed galaxy has a redshift of z=5.043, placing it shortly after the end of the Epoch of Reionization, a...

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Published in:arXiv.org 2024-01
Main Authors: Klein, Maxwell, Keren, Sharon, Napier, Kate, Gladders, Michael D, Khullar, Gourav, Bayliss, Matthew, Dahle, Håkon, M Riley Owens, Stark, Antony, Brownsberger, Sasha, Kim, Keunho J, Kuchta, Nicole, Mahler, Guillaume, Smith, Grace, Walker, Ryan, Gozman, Katya, Martinez, Michael N, Matthews Acuña, Owen S, Merz, Kaiya, Sanchez, Jorge A, Stein, Daniel J Kavin, Sukay, Ezra O, Tavangar, Kiyan
Format: Article
Language:English
Subjects:
Clusters
Constraint modelling
Galaxies
Ionization
Lenses
Physical properties
Red shift
Space telescopes
Spatial resolution
Star & galaxy formation
Star formation rate
Stellar mass
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Summary:We present a strong lensing analysis of COOL J1241+2219, the brightest known gravitationally lensed galaxy at \(z \geq 5\), based on new multi-band Hubble Space Telescope (HST) imaging data. The lensed galaxy has a redshift of z=5.043, placing it shortly after the end of the Epoch of Reionization, and an AB magnitude z_AB=20.47 mag (Khullar et al. 2021). As such, it serves as a touchstone for future research of that epoch. The high spatial resolution of HST reveals internal structure in the giant arc, from which we identify 15 constraints and construct a robust lens model. We use the lens model to extract cluster mass and lensing magnification. We find that the mass enclosed within the Einstein radius of the z=1.001 cluster lens is M(
ISSN:2331-8422