REQUIEM-2D Methodology: Spatially Resolved Stellar Populations of Massive Lensed Quiescent Galaxies from Hubble Space Telescope 2D Grism Spectroscopy

Research output: Contribution to journal › Journal article › Research › peer-review

Standard

REQUIEM-2D Methodology : Spatially Resolved Stellar Populations of Massive Lensed Quiescent Galaxies from Hubble Space Telescope 2D Grism Spectroscopy. / Akhshik, Mohammad; Whitaker, Katherine E.; Brammer, Gabriel; Mahler, Guillaume; Sharon, Keren; Leja, Joel; Bayliss, Matthew B.; Bezanson, Rachel; Gladders, Michael D.; Man, Allison; Nelson, Erica J.; Rigby, Jane R.; Rizzo, Francesca; Toft, Sune; Wellons, Sarah; Williams, Christina C.

In: Astrophysical Journal, Vol. 900, No. 2, 184, 15.09.2020.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Akhshik, M, Whitaker, KE, Brammer, G, Mahler, G, Sharon, K, Leja, J, Bayliss, MB, Bezanson, R, Gladders, MD, Man, A, Nelson, EJ, Rigby, JR, Rizzo, F, Toft, S, Wellons, S & Williams, CC 2020, 'REQUIEM-2D Methodology: Spatially Resolved Stellar Populations of Massive Lensed Quiescent Galaxies from Hubble Space Telescope 2D Grism Spectroscopy', Astrophysical Journal, vol. 900, no. 2, 184. https://doi.org/10.3847/1538-4357/abac62

APA

Akhshik, M., Whitaker, K. E., Brammer, G., Mahler, G., Sharon, K., Leja, J., Bayliss, M. B., Bezanson, R., Gladders, M. D., Man, A., Nelson, E. J., Rigby, J. R., Rizzo, F., Toft, S., Wellons, S., & Williams, C. C. (2020). REQUIEM-2D Methodology: Spatially Resolved Stellar Populations of Massive Lensed Quiescent Galaxies from Hubble Space Telescope 2D Grism Spectroscopy. Astrophysical Journal, 900(2), [184]. https://doi.org/10.3847/1538-4357/abac62

Vancouver

Akhshik M, Whitaker KE, Brammer G, Mahler G, Sharon K, Leja J et al. REQUIEM-2D Methodology: Spatially Resolved Stellar Populations of Massive Lensed Quiescent Galaxies from Hubble Space Telescope 2D Grism Spectroscopy. Astrophysical Journal. 2020 Sep 15;900(2). 184. https://doi.org/10.3847/1538-4357/abac62

Author

Akhshik, Mohammad ; Whitaker, Katherine E. ; Brammer, Gabriel ; Mahler, Guillaume ; Sharon, Keren ; Leja, Joel ; Bayliss, Matthew B. ; Bezanson, Rachel ; Gladders, Michael D. ; Man, Allison ; Nelson, Erica J. ; Rigby, Jane R. ; Rizzo, Francesca ; Toft, Sune ; Wellons, Sarah ; Williams, Christina C. / REQUIEM-2D Methodology : Spatially Resolved Stellar Populations of Massive Lensed Quiescent Galaxies from Hubble Space Telescope 2D Grism Spectroscopy. In: Astrophysical Journal. 2020 ; Vol. 900, No. 2.

Bibtex

@article{4f8304def3e541f8b33f2f198363468c,
title = "REQUIEM-2D Methodology: Spatially Resolved Stellar Populations of Massive Lensed Quiescent Galaxies from Hubble Space Telescope 2D Grism Spectroscopy",
abstract = "We present a novel Bayesian methodology to jointly model photometry and deep Hubble Space Telescope 2D grism spectroscopy of high-redshift galaxies. Our requiem2d code measures both unresolved and resolved stellar populations, ages, and star formation histories (SFHs) for the ongoing REsolving QUIEscent Magnified (REQUIEM) Galaxies Survey, which targets strong gravitationally lensed quiescent galaxies a z similar to 2. We test the accuracy of requiem2d using a simulated sample of massive galaxies at z similar to 2 from the Illustris cosmological simulation and find that we recover the general trends in SFH and median stellar ages. We further present a pilot study for the REQUIEM Galaxies Survey: MRG-S0851, a quintuply imaged, massive (logM/M-circle dot = 11.02 +/- 0.04) red galaxy at z = 1.883.+/-.0.001. With an estimated gravitational magnification of mu = 5.7(-0.2)(+0.4), we sample the stellar populations on 0.6 kpc physical size bins. The global mass-weighted median age is constrained to be 1.8(-0.2)(+0.3) Gyr, and our spatially resolved analysis reveals that MRG-S0851 has a flat age gradient in the inner 3 kpc core after taking into account the subtle effects of dust and metallicity on age measurements, favoring an early formation scenario. The analysis for the full REQUIEM-2D sample will be presented in a forthcoming paper with a beta release of the requiem2d code.",
keywords = "LYMAN BREAK GALAXY, STAR-FORMING GALAXY, ILLUSTRIS PROJECT, Z=2 GALAXY, DEEP FIELD, EVOLUTION, DISCOVERY, SPECTRA, Z-SIMILAR-TO-2.3, CONFIRMATION",
author = "Mohammad Akhshik and Whitaker, {Katherine E.} and Gabriel Brammer and Guillaume Mahler and Keren Sharon and Joel Leja and Bayliss, {Matthew B.} and Rachel Bezanson and Gladders, {Michael D.} and Allison Man and Nelson, {Erica J.} and Rigby, {Jane R.} and Francesca Rizzo and Sune Toft and Sarah Wellons and Williams, {Christina C.}",
year = "2020",
month = sep,
day = "15",
doi = "10.3847/1538-4357/abac62",
language = "English",
volume = "900",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "Institute of Physics Publishing, Inc",
number = "2",

}

RIS

TY - JOUR

T1 - REQUIEM-2D Methodology

T2 - Spatially Resolved Stellar Populations of Massive Lensed Quiescent Galaxies from Hubble Space Telescope 2D Grism Spectroscopy

AU - Akhshik, Mohammad

AU - Whitaker, Katherine E.

AU - Brammer, Gabriel

AU - Mahler, Guillaume

AU - Sharon, Keren

AU - Leja, Joel

AU - Bayliss, Matthew B.

AU - Bezanson, Rachel

AU - Gladders, Michael D.

AU - Man, Allison

AU - Nelson, Erica J.

AU - Rigby, Jane R.

AU - Rizzo, Francesca

AU - Toft, Sune

AU - Wellons, Sarah

AU - Williams, Christina C.

PY - 2020/9/15

Y1 - 2020/9/15

N2 - We present a novel Bayesian methodology to jointly model photometry and deep Hubble Space Telescope 2D grism spectroscopy of high-redshift galaxies. Our requiem2d code measures both unresolved and resolved stellar populations, ages, and star formation histories (SFHs) for the ongoing REsolving QUIEscent Magnified (REQUIEM) Galaxies Survey, which targets strong gravitationally lensed quiescent galaxies a z similar to 2. We test the accuracy of requiem2d using a simulated sample of massive galaxies at z similar to 2 from the Illustris cosmological simulation and find that we recover the general trends in SFH and median stellar ages. We further present a pilot study for the REQUIEM Galaxies Survey: MRG-S0851, a quintuply imaged, massive (logM/M-circle dot = 11.02 +/- 0.04) red galaxy at z = 1.883.+/-.0.001. With an estimated gravitational magnification of mu = 5.7(-0.2)(+0.4), we sample the stellar populations on 0.6 kpc physical size bins. The global mass-weighted median age is constrained to be 1.8(-0.2)(+0.3) Gyr, and our spatially resolved analysis reveals that MRG-S0851 has a flat age gradient in the inner 3 kpc core after taking into account the subtle effects of dust and metallicity on age measurements, favoring an early formation scenario. The analysis for the full REQUIEM-2D sample will be presented in a forthcoming paper with a beta release of the requiem2d code.

AB - We present a novel Bayesian methodology to jointly model photometry and deep Hubble Space Telescope 2D grism spectroscopy of high-redshift galaxies. Our requiem2d code measures both unresolved and resolved stellar populations, ages, and star formation histories (SFHs) for the ongoing REsolving QUIEscent Magnified (REQUIEM) Galaxies Survey, which targets strong gravitationally lensed quiescent galaxies a z similar to 2. We test the accuracy of requiem2d using a simulated sample of massive galaxies at z similar to 2 from the Illustris cosmological simulation and find that we recover the general trends in SFH and median stellar ages. We further present a pilot study for the REQUIEM Galaxies Survey: MRG-S0851, a quintuply imaged, massive (logM/M-circle dot = 11.02 +/- 0.04) red galaxy at z = 1.883.+/-.0.001. With an estimated gravitational magnification of mu = 5.7(-0.2)(+0.4), we sample the stellar populations on 0.6 kpc physical size bins. The global mass-weighted median age is constrained to be 1.8(-0.2)(+0.3) Gyr, and our spatially resolved analysis reveals that MRG-S0851 has a flat age gradient in the inner 3 kpc core after taking into account the subtle effects of dust and metallicity on age measurements, favoring an early formation scenario. The analysis for the full REQUIEM-2D sample will be presented in a forthcoming paper with a beta release of the requiem2d code.

KW - LYMAN BREAK GALAXY

KW - STAR-FORMING GALAXY

KW - ILLUSTRIS PROJECT

KW - Z=2 GALAXY

KW - DEEP FIELD

KW - EVOLUTION

KW - DISCOVERY

KW - SPECTRA

KW - Z-SIMILAR-TO-2.3

KW - CONFIRMATION

U2 - 10.3847/1538-4357/abac62

DO - 10.3847/1538-4357/abac62

M3 - Journal article

VL - 900

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 2

M1 - 184

ER -

ID: 249302560