DESI-253.2534+26.8843: A New Einstein Cross Spectroscopically Confirmed with Very Large Telescope/MUSE and Modeled with GIGA-Lens
Abstract
Gravitational lensing provides unique insights into astrophysics and cosmology, including the determination of galaxy mass profiles and constraining cosmological parameters. We present spectroscopic confirmation and lens modeling of the strong lensing system DESI-253.2534+26.8843, discovered in the Dark Energy Spectroscopic Instrument (DESI) Legacy Imaging Surveys data. This system consists of a massive elliptical galaxy surrounded by four blue images forming an Einstein Cross pattern. We obtained spectroscopic observations of this system using the Multi Unit Spectroscopic Explorer on ESO's Very Large Telescope and confirmed its lensing nature. The main lens, which is the elliptical galaxy, has a redshift of zL1 = 0.636 ± 0.001, while the spectra of the background source images are typical of a starburst galaxy and have a redshift of zs = 2.597 ± 0.001. Additionally, we identified a faint galaxy foreground of one of the lensed images, with a redshift of zL2 = 0.386. We employed the GIGA-Lens modeling code to characterize this system and determined the Einstein radius of the main lens to be $${\theta }_{{\rm{E}}}=2\buildrel{\prime\prime}\over{.} {520}_{-0.031}^{+0.032}$$, which corresponds to a velocity dispersion of σ = 379 ± 2 km s–1. Our study contributes to a growing catalog of this rare kind of strong lensing system and demonstrates the effectiveness of spectroscopic integral field unit observations and advanced modeling techniques in understanding the properties of these systems.
- Authors:
-
- NSF’s NOIRLab (Chile). Gemini Observatory
- University of San Francisco (California); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Univ. of California, Los Angeles, CA (United States)
- Univ. of Hawaii, Honolulu, HI (United States)
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Univ. of Tokyo (Japan). Kavli Institute for the Physics and Mathematics of the Universe (WPI)
- NSF’s NOIRLab (Chile). SOAR Telescope
- Calar Alto Observatory (Spain)
- Aix-Marseille Univ., Marseille (France); Centre National de la Recherche Scientifique (CNRS) (France)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
- OSTI Identifier:
- 2007144
- Grant/Contract Number:
- AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- The Astrophysical Journal. Letters
- Additional Journal Information:
- Journal Volume: 953; Journal Issue: 1; Journal ID: ISSN 2041-8205
- Publisher:
- IOP Publishing
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; strong gravitational lensing
Citation Formats
Cikota, Aleksandar, Bertolla, Ivonne Toro, Huang, Xiaosheng, Baltasar, Saul, Ratier-Werbin, Nicolas, Sheu, William, Storfer, Christopher, Suzuki, Nao, Schlegel, David J., Cartier, Regis, Torres, Simon, Cikota, Stefan, and Jullo, Eric. DESI-253.2534+26.8843: A New Einstein Cross Spectroscopically Confirmed with Very Large Telescope/MUSE and Modeled with GIGA-Lens. United States: N. p., 2023.
Web. doi:10.3847/2041-8213/ace9da.
Cikota, Aleksandar, Bertolla, Ivonne Toro, Huang, Xiaosheng, Baltasar, Saul, Ratier-Werbin, Nicolas, Sheu, William, Storfer, Christopher, Suzuki, Nao, Schlegel, David J., Cartier, Regis, Torres, Simon, Cikota, Stefan, & Jullo, Eric. DESI-253.2534+26.8843: A New Einstein Cross Spectroscopically Confirmed with Very Large Telescope/MUSE and Modeled with GIGA-Lens. United States. https://doi.org/10.3847/2041-8213/ace9da
Cikota, Aleksandar, Bertolla, Ivonne Toro, Huang, Xiaosheng, Baltasar, Saul, Ratier-Werbin, Nicolas, Sheu, William, Storfer, Christopher, Suzuki, Nao, Schlegel, David J., Cartier, Regis, Torres, Simon, Cikota, Stefan, and Jullo, Eric. Tue .
"DESI-253.2534+26.8843: A New Einstein Cross Spectroscopically Confirmed with Very Large Telescope/MUSE and Modeled with GIGA-Lens". United States. https://doi.org/10.3847/2041-8213/ace9da. https://www.osti.gov/servlets/purl/2007144.
@article{osti_2007144,
title = {DESI-253.2534+26.8843: A New Einstein Cross Spectroscopically Confirmed with Very Large Telescope/MUSE and Modeled with GIGA-Lens},
author = {Cikota, Aleksandar and Bertolla, Ivonne Toro and Huang, Xiaosheng and Baltasar, Saul and Ratier-Werbin, Nicolas and Sheu, William and Storfer, Christopher and Suzuki, Nao and Schlegel, David J. and Cartier, Regis and Torres, Simon and Cikota, Stefan and Jullo, Eric},
abstractNote = {Gravitational lensing provides unique insights into astrophysics and cosmology, including the determination of galaxy mass profiles and constraining cosmological parameters. We present spectroscopic confirmation and lens modeling of the strong lensing system DESI-253.2534+26.8843, discovered in the Dark Energy Spectroscopic Instrument (DESI) Legacy Imaging Surveys data. This system consists of a massive elliptical galaxy surrounded by four blue images forming an Einstein Cross pattern. We obtained spectroscopic observations of this system using the Multi Unit Spectroscopic Explorer on ESO's Very Large Telescope and confirmed its lensing nature. The main lens, which is the elliptical galaxy, has a redshift of zL1 = 0.636 ± 0.001, while the spectra of the background source images are typical of a starburst galaxy and have a redshift of zs = 2.597 ± 0.001. Additionally, we identified a faint galaxy foreground of one of the lensed images, with a redshift of zL2 = 0.386. We employed the GIGA-Lens modeling code to characterize this system and determined the Einstein radius of the main lens to be ${\theta }_{{\rm{E}}}=2\buildrel{\prime\prime}\over{.} {520}_{-0.031}^{+0.032}$, which corresponds to a velocity dispersion of σ = 379 ± 2 km s–1. Our study contributes to a growing catalog of this rare kind of strong lensing system and demonstrates the effectiveness of spectroscopic integral field unit observations and advanced modeling techniques in understanding the properties of these systems.},
doi = {10.3847/2041-8213/ace9da},
journal = {The Astrophysical Journal. Letters},
number = 1,
volume = 953,
place = {United States},
year = {Tue Aug 08 00:00:00 EDT 2023},
month = {Tue Aug 08 00:00:00 EDT 2023}
}
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