Infrared properties of z = 7 galaxies from cosmological simulations

Renyue Cen, Taysun Kimm

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Three-dimensional panchromatic dust radiative transfer calculations are performed on a set of 198 galaxies of stellar masses in the range of 5 × 108 to 3 × 1010 M from a cosmological hydrodynamic simulation (resolved at 29 h -1 pc) at z 7. In a companion paper, the stellar mass and UV luminosity functions and the UV-optical and FUV-NUV colors are shown to be in good agreement with observations if a Small Magellanic Cloud type dust extinction curve is adopted. Here, we make useful predictions, self-consistently, of the infrared properties of these z 7 simulated galaxies that can be confronted with upcoming ALMA data. Our findings are as follows. (1) The effective radius in the rest-frame MIPS70 μm band is in the range of 80-400 pc proper for z = 7 galaxies with L FIR = 1011.3-10 12 L . (2) The median of the peak wavelength of the far-infrared (FIR) spectral energy distribution is in the range of 45-60 μm, depending on the dust-to-metal ratio. (3) For star formation rate in the range of 3-100 M yr-1, the median FIR to bolometric luminosity ratio is 60%-90%. (4) The FIR luminosity function displays a power law in the high end with a slope of -3.1 ± 0.4 instead of the usual exponential decline.

Original languageEnglish
Article number32
JournalAstrophysical Journal
Volume782
Issue number1
DOIs
Publication statusPublished - 2014 Feb 10

Fingerprint

dust
luminosity
galaxies
stellar mass
simulation
Magellanic clouds
star formation rate
spectral energy distribution
radiative transfer
power law
extinction
hydrodynamics
slopes
wavelength
color
radii
metal
curves
prediction
predictions

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

@article{dae70fa53dd849c69813c8577e170c3d,
title = "Infrared properties of z = 7 galaxies from cosmological simulations",
abstract = "Three-dimensional panchromatic dust radiative transfer calculations are performed on a set of 198 galaxies of stellar masses in the range of 5 × 108 to 3 × 1010 M from a cosmological hydrodynamic simulation (resolved at 29 h -1 pc) at z 7. In a companion paper, the stellar mass and UV luminosity functions and the UV-optical and FUV-NUV colors are shown to be in good agreement with observations if a Small Magellanic Cloud type dust extinction curve is adopted. Here, we make useful predictions, self-consistently, of the infrared properties of these z 7 simulated galaxies that can be confronted with upcoming ALMA data. Our findings are as follows. (1) The effective radius in the rest-frame MIPS70 μm band is in the range of 80-400 pc proper for z = 7 galaxies with L FIR = 1011.3-10 12 L . (2) The median of the peak wavelength of the far-infrared (FIR) spectral energy distribution is in the range of 45-60 μm, depending on the dust-to-metal ratio. (3) For star formation rate in the range of 3-100 M yr-1, the median FIR to bolometric luminosity ratio is 60{\%}-90{\%}. (4) The FIR luminosity function displays a power law in the high end with a slope of -3.1 ± 0.4 instead of the usual exponential decline.",
author = "Renyue Cen and Taysun Kimm",
year = "2014",
month = "2",
day = "10",
doi = "10.1088/0004-637X/782/1/32",
language = "English",
volume = "782",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing Ltd.",
number = "1",

}

Infrared properties of z = 7 galaxies from cosmological simulations. / Cen, Renyue; Kimm, Taysun.

In: Astrophysical Journal, Vol. 782, No. 1, 32, 10.02.2014.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Infrared properties of z = 7 galaxies from cosmological simulations

AU - Cen, Renyue

AU - Kimm, Taysun

PY - 2014/2/10

Y1 - 2014/2/10

N2 - Three-dimensional panchromatic dust radiative transfer calculations are performed on a set of 198 galaxies of stellar masses in the range of 5 × 108 to 3 × 1010 M from a cosmological hydrodynamic simulation (resolved at 29 h -1 pc) at z 7. In a companion paper, the stellar mass and UV luminosity functions and the UV-optical and FUV-NUV colors are shown to be in good agreement with observations if a Small Magellanic Cloud type dust extinction curve is adopted. Here, we make useful predictions, self-consistently, of the infrared properties of these z 7 simulated galaxies that can be confronted with upcoming ALMA data. Our findings are as follows. (1) The effective radius in the rest-frame MIPS70 μm band is in the range of 80-400 pc proper for z = 7 galaxies with L FIR = 1011.3-10 12 L . (2) The median of the peak wavelength of the far-infrared (FIR) spectral energy distribution is in the range of 45-60 μm, depending on the dust-to-metal ratio. (3) For star formation rate in the range of 3-100 M yr-1, the median FIR to bolometric luminosity ratio is 60%-90%. (4) The FIR luminosity function displays a power law in the high end with a slope of -3.1 ± 0.4 instead of the usual exponential decline.

AB - Three-dimensional panchromatic dust radiative transfer calculations are performed on a set of 198 galaxies of stellar masses in the range of 5 × 108 to 3 × 1010 M from a cosmological hydrodynamic simulation (resolved at 29 h -1 pc) at z 7. In a companion paper, the stellar mass and UV luminosity functions and the UV-optical and FUV-NUV colors are shown to be in good agreement with observations if a Small Magellanic Cloud type dust extinction curve is adopted. Here, we make useful predictions, self-consistently, of the infrared properties of these z 7 simulated galaxies that can be confronted with upcoming ALMA data. Our findings are as follows. (1) The effective radius in the rest-frame MIPS70 μm band is in the range of 80-400 pc proper for z = 7 galaxies with L FIR = 1011.3-10 12 L . (2) The median of the peak wavelength of the far-infrared (FIR) spectral energy distribution is in the range of 45-60 μm, depending on the dust-to-metal ratio. (3) For star formation rate in the range of 3-100 M yr-1, the median FIR to bolometric luminosity ratio is 60%-90%. (4) The FIR luminosity function displays a power law in the high end with a slope of -3.1 ± 0.4 instead of the usual exponential decline.

UR - http://www.scopus.com/inward/record.url?scp=84893117786&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84893117786&partnerID=8YFLogxK

U2 - 10.1088/0004-637X/782/1/32

DO - 10.1088/0004-637X/782/1/32

M3 - Article

VL - 782

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 1

M1 - 32

ER -