z similar to 2-9 Galaxies Magnified by the Hubble Frontier Field Clusters. II. Luminosity Functions and Constraints on a Faint-end Turnover

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z similar to 2-9 Galaxies Magnified by the Hubble Frontier Field Clusters. II. Luminosity Functions and Constraints on a Faint-end Turnover. / Bouwens, R. J.; Illingworth, G.; Ellis, R. S.; Oesch, P.; Stefanon, M.

In: Astrophysical Journal, Vol. 940, No. 1, 55, 18.11.2022.

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

Harvard

Bouwens, RJ, Illingworth, G, Ellis, RS, Oesch, P & Stefanon, M 2022, 'z similar to 2-9 Galaxies Magnified by the Hubble Frontier Field Clusters. II. Luminosity Functions and Constraints on a Faint-end Turnover', Astrophysical Journal, vol. 940, no. 1, 55. https://doi.org/10.3847/1538-4357/ac86d1

APA

Bouwens, R. J., Illingworth, G., Ellis, R. S., Oesch, P., & Stefanon, M. (2022). z similar to 2-9 Galaxies Magnified by the Hubble Frontier Field Clusters. II. Luminosity Functions and Constraints on a Faint-end Turnover. Astrophysical Journal, 940(1), [55]. https://doi.org/10.3847/1538-4357/ac86d1

Vancouver

Bouwens RJ, Illingworth G, Ellis RS, Oesch P, Stefanon M. z similar to 2-9 Galaxies Magnified by the Hubble Frontier Field Clusters. II. Luminosity Functions and Constraints on a Faint-end Turnover. Astrophysical Journal. 2022 Nov 18;940(1). 55. https://doi.org/10.3847/1538-4357/ac86d1

Author

Bouwens, R. J. ; Illingworth, G. ; Ellis, R. S. ; Oesch, P. ; Stefanon, M. / z similar to 2-9 Galaxies Magnified by the Hubble Frontier Field Clusters. II. Luminosity Functions and Constraints on a Faint-end Turnover. In: Astrophysical Journal. 2022 ; Vol. 940, No. 1.

Bibtex

@article{77d15e6aa9fe4c53baec741194759515,
title = "z similar to 2-9 Galaxies Magnified by the Hubble Frontier Field Clusters. II. Luminosity Functions and Constraints on a Faint-end Turnover",
abstract = "We present new determinations of the rest-UV luminosity functions (LFs) at z = 2-9 to extremely low luminosities (>-14 mag) from a sample of >2500 lensed galaxies found behind the Hubble Frontier Fields (HFF) clusters. For the first time, we present faint-end slope results from lensed samples that are fully consistent with blank-field results over the redshift range z = 2-9, while reaching to much lower luminosities than possible from the blank-field studies. Combining the deep lensed sample with the large blank-field samples allows us to set tight constraints on the faint-end slope alpha of the z = 2-9 UV LFs and its evolution. We find a smooth flattening in alpha from -2.28 +/- 0.10 (z = 9) to -1.53 +/- 0.03 (z = 2) with cosmic time (d alpha/dz = -0.11 +/- 0.01), fully consistent with dark matter halo buildup. We utilize these new results to present new measurements of the evolution in the UV luminosity density rho ( UV ) brighter than -13 mag from z similar to 9 to z similar to 2. Accounting for the star formation rate (SFR) densities to faint luminosities implied by our LF results, we find that unobscured star formation dominates the SFR density at z greater than or similar to 4, with obscured star formation dominant thereafter. Having shown we can quantify the faint-end slope alpha of the LF accurately with our lensed HFF samples, we also quantify the apparent curvature in the shape of the UV LF through a curvature parameter delta. The constraints on the curvature delta strongly rule out the presence of a turn-over brighter than -13.1 mag at z similar to 3, -14.3 mag at z similar to 6, and -15.5 mag at all other redshifts between z similar to 9 and z similar to 2.",
keywords = "Luminosity function, Strong gravitational lensing, Deep space probes, High-redshift galaxies, ULTRA-DEEP FIELD, STAR-FORMATION RATE, RADIATION-HYDRODYNAMICS SIMULATION, UV-CONTINUUM SLOPE, HIGH-REDSHIFT, ILLUSTRISTNG SIMULATIONS, BRIGHT END, COSMIC DAWN, DUST OBSCURATION, 1ST GALAXIES",
author = "Bouwens, {R. J.} and G. Illingworth and Ellis, {R. S.} and P. Oesch and M. Stefanon",
year = "2022",
month = nov,
day = "18",
doi = "10.3847/1538-4357/ac86d1",
language = "English",
volume = "940",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "Institute of Physics Publishing, Inc",
number = "1",

}

RIS

TY - JOUR

T1 - z similar to 2-9 Galaxies Magnified by the Hubble Frontier Field Clusters. II. Luminosity Functions and Constraints on a Faint-end Turnover

AU - Bouwens, R. J.

AU - Illingworth, G.

AU - Ellis, R. S.

AU - Oesch, P.

AU - Stefanon, M.

PY - 2022/11/18

Y1 - 2022/11/18

N2 - We present new determinations of the rest-UV luminosity functions (LFs) at z = 2-9 to extremely low luminosities (>-14 mag) from a sample of >2500 lensed galaxies found behind the Hubble Frontier Fields (HFF) clusters. For the first time, we present faint-end slope results from lensed samples that are fully consistent with blank-field results over the redshift range z = 2-9, while reaching to much lower luminosities than possible from the blank-field studies. Combining the deep lensed sample with the large blank-field samples allows us to set tight constraints on the faint-end slope alpha of the z = 2-9 UV LFs and its evolution. We find a smooth flattening in alpha from -2.28 +/- 0.10 (z = 9) to -1.53 +/- 0.03 (z = 2) with cosmic time (d alpha/dz = -0.11 +/- 0.01), fully consistent with dark matter halo buildup. We utilize these new results to present new measurements of the evolution in the UV luminosity density rho ( UV ) brighter than -13 mag from z similar to 9 to z similar to 2. Accounting for the star formation rate (SFR) densities to faint luminosities implied by our LF results, we find that unobscured star formation dominates the SFR density at z greater than or similar to 4, with obscured star formation dominant thereafter. Having shown we can quantify the faint-end slope alpha of the LF accurately with our lensed HFF samples, we also quantify the apparent curvature in the shape of the UV LF through a curvature parameter delta. The constraints on the curvature delta strongly rule out the presence of a turn-over brighter than -13.1 mag at z similar to 3, -14.3 mag at z similar to 6, and -15.5 mag at all other redshifts between z similar to 9 and z similar to 2.

AB - We present new determinations of the rest-UV luminosity functions (LFs) at z = 2-9 to extremely low luminosities (>-14 mag) from a sample of >2500 lensed galaxies found behind the Hubble Frontier Fields (HFF) clusters. For the first time, we present faint-end slope results from lensed samples that are fully consistent with blank-field results over the redshift range z = 2-9, while reaching to much lower luminosities than possible from the blank-field studies. Combining the deep lensed sample with the large blank-field samples allows us to set tight constraints on the faint-end slope alpha of the z = 2-9 UV LFs and its evolution. We find a smooth flattening in alpha from -2.28 +/- 0.10 (z = 9) to -1.53 +/- 0.03 (z = 2) with cosmic time (d alpha/dz = -0.11 +/- 0.01), fully consistent with dark matter halo buildup. We utilize these new results to present new measurements of the evolution in the UV luminosity density rho ( UV ) brighter than -13 mag from z similar to 9 to z similar to 2. Accounting for the star formation rate (SFR) densities to faint luminosities implied by our LF results, we find that unobscured star formation dominates the SFR density at z greater than or similar to 4, with obscured star formation dominant thereafter. Having shown we can quantify the faint-end slope alpha of the LF accurately with our lensed HFF samples, we also quantify the apparent curvature in the shape of the UV LF through a curvature parameter delta. The constraints on the curvature delta strongly rule out the presence of a turn-over brighter than -13.1 mag at z similar to 3, -14.3 mag at z similar to 6, and -15.5 mag at all other redshifts between z similar to 9 and z similar to 2.

KW - Luminosity function

KW - Strong gravitational lensing

KW - Deep space probes

KW - High-redshift galaxies

KW - ULTRA-DEEP FIELD

KW - STAR-FORMATION RATE

KW - RADIATION-HYDRODYNAMICS SIMULATION

KW - UV-CONTINUUM SLOPE

KW - HIGH-REDSHIFT

KW - ILLUSTRISTNG SIMULATIONS

KW - BRIGHT END

KW - COSMIC DAWN

KW - DUST OBSCURATION

KW - 1ST GALAXIES

U2 - 10.3847/1538-4357/ac86d1

DO - 10.3847/1538-4357/ac86d1

M3 - Journal article

VL - 940

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 1

M1 - 55

ER -

ID: 327937874