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COOL-LAMPS. II. Characterizing the Size and Star Formation History of a Bright Strongly Lensed Early-type Galaxy at Redshift 1.02

Sukay, Ezra ; Khullar, Gourav ; Gladders, Michael D. ; Sharon, Keren ; Mahler, Guillaume ; Napier, Kate ; Bleem, Lindsey E. ; Dahle, HÅkon ; Florian, Michael K. ; Gozman, Katya ; Lin, Jason J. ; Martinez, Michael N. ; Matthews Acuña, Owen S. ; Medina, Elisabeth ; Merz, Kaiya ; Sanchez, Jorge A. ; Sisco, Emily E. ; Kavin Stein, Daniel J. ; Tavangar, Kiyan ; Whitaker, Katherine E.

The Astrophysical journal, 2022-11, Vol.940 (1), p.42 [Periódico revisado por pares]

Philadelphia: The American Astronomical Society

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Título:
COOL-LAMPS. II. Characterizing the Size and Star Formation History of a Bright Strongly Lensed Early-type Galaxy at Redshift 1.02
Autor: Sukay, Ezra ; Khullar, Gourav ; Gladders, Michael D. ; Sharon, Keren ; Mahler, Guillaume ; Napier, Kate ; Bleem, Lindsey E. ; Dahle, HÅkon ; Florian, Michael K. ; Gozman, Katya ; Lin, Jason J. ; Martinez, Michael N. ; Matthews Acuña, Owen S. ; Medina, Elisabeth ; Merz, Kaiya ; Sanchez, Jorge A. ; Sisco, Emily E. ; Kavin Stein, Daniel J. ; Tavangar, Kiyan ; Whitaker, Katherine E.
Assuntos: Astronomical models ; Astrophysics ; Early-type galaxies ; Elliptical galaxies ; Galactic clusters ; Galactic evolution ; Galaxies ; Galaxy evolution ; Galaxy quenching ; Galaxy spectroscopy ; Gravitational lenses ; High-redshift galaxies ; Lamps ; Metallicity ; Quenched galaxies ; Red shift ; Spectral energy distribution ; Spectroscopy ; Star & galaxy formation ; Star formation ; Star formation rate ; Stars ; Stars & galaxies ; Stellar mass ; Stellar models ; Strong gravitational lensing
É parte de: The Astrophysical journal, 2022-11, Vol.940 (1), p.42
Notas: AAS38419
Galaxies and Cosmology
Descrição: Abstract We present COOL J1323+0343, an early-type galaxy at z = 1.0153 ± 0.0006, strongly lensed by a cluster of galaxies at z = 0.353 ± 0.001. This object was originally imaged by DECaLS and noted as a gravitational lens by COOL-LAMPS, a collaboration initiated to find strong-lensing systems in recent public optical imaging data, and confirmed with follow-up data. With ground-based grzH imaging and optical spectroscopy from the Las Campanas Observatory and the Nordic Optical Telescope, we derive a stellar mass, metallicity, and star formation history from stellar-population synthesis modeling. The lens modeling implies a total magnification, summed over the three images in the arc, of μ ∼ 113. The stellar mass in the source plane is M * ∼ 10.64 M ⊙ and the 1 σ upper limit on the star formation rate (SFR) in the source plane is SFR ∼ 3.75 × 10 −2 M ⊙ yr −1 (log sSFR = −12.1 yr −1 ) in the youngest two age bins (0–100 Myr), closest to the epoch of observation. Our measurements place COOL J1323+0343 below the characteristic mass of the stellar mass function, making it an especially compelling target that could help clarify how intermediate-mass quiescent galaxies evolve. We reconstruct COOL J1323+0343 in the source plane and fit its light profile. This object is below the expected size evolution of an early-type galaxy at this mass with an effective radius r e ∼ 0.5 kpc. This extraordinarily magnified and bright lensed early-type galaxy offers an exciting opportunity to study the morphology and star formation history of an intermediate-mass early-type galaxy in detail at z ∼ 1.
Editor: Philadelphia: The American Astronomical Society
Idioma: Inglês;Norueguês

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COOL-LAMPS. II. Characterizing the Size and Star Formation History of a Bright Strongly Lensed Early-type Galaxy at Redshift 1.02

Philadelphia: The American Astronomical Society

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