A Unified Empirical Model for Infrared Galaxy Counts Based on the Observed Physical Evolution of Distant Galaxies. Béthermin, M., Daddi, E., Magdis, G., Sargent, M. T., Hezaveh, Y., Elbaz, D., Le Borgne, D., Mullaney, J., Pannella, M., Buat, V., Charmandaris, V., Lagache, G., & Scott, D. The Astrophysical Journal Letters, 757:L23, October, 2012. ![A Unified Empirical Model for Infrared Galaxy Counts Based on the Observed Physical Evolution of Distant Galaxies [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex We reproduce the mid-infrared to radio galaxy counts with a new empirical model based on our current understanding of the evolution of main-sequence (MS) and starburst (SB) galaxies. We rely on a simple spectral energy distribution (SED) library based on Herschel observations: a single SED for the MS and another one for SB, getting warmer with redshift. Our model is able to reproduce recent measurements of galaxy counts performed with Herschel, including counts per redshift slice. This agreement demonstrates the power of our 2-Star-Formation Modes (2SFM) decomposition in describing the statistical properties of infrared sources and their evolution with cosmic time. We discuss the relative contribution of MS and SB galaxies to the number counts at various wavelengths and flux densities. We also show that MS galaxies are responsible for a bump in the 1.4 GHz radio counts around 50 μJy. Material of the model (predictions, SED library, mock catalogs, etc.) is available online.
@article{bethermin_unified_2012,
title = {A {Unified} {Empirical} {Model} for {Infrared} {Galaxy} {Counts} {Based} on the {Observed} {Physical} {Evolution} of {Distant} {Galaxies}},
volume = {757},
issn = {0004-637X},
url = {http://adsabs.harvard.edu/abs/2012ApJ...757L..23B},
doi = {10.1088/2041-8205/757/2/L23},
abstract = {We reproduce the mid-infrared to radio galaxy counts with a new
empirical model based on our current understanding of the evolution of
main-sequence (MS) and starburst (SB) galaxies. We rely on a simple
spectral energy distribution (SED) library based on Herschel
observations: a single SED for the MS and another one for SB, getting
warmer with redshift. Our model is able to reproduce recent measurements
of galaxy counts performed with Herschel, including counts per redshift
slice. This agreement demonstrates the power of our 2-Star-Formation
Modes (2SFM) decomposition in describing the statistical properties of
infrared sources and their evolution with cosmic time. We discuss the
relative contribution of MS and SB galaxies to the number counts at
various wavelengths and flux densities. We also show that MS galaxies
are responsible for a bump in the 1.4 GHz radio counts around 50 μJy.
Material of the model (predictions, SED library, mock catalogs, etc.)
is available online.},
urldate = {2020-05-26},
journal = {The Astrophysical Journal Letters},
author = {Béthermin, Matthieu and Daddi, Emanuele and Magdis, Georgios and Sargent, Mark T. and Hezaveh, Yashar and Elbaz, David and Le Borgne, Damien and Mullaney, James and Pannella, Maurilio and Buat, Véronique and Charmandaris, Vassilis and Lagache, Guilaine and Scott, Douglas},
month = oct,
year = {2012},
keywords = {galaxies: evolution, galaxies: star formation, galaxies: statistics, infrared: galaxies, submillimeter: galaxies},
pages = {L23},
}
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We rely on a simple spectral energy distribution (SED) library based on Herschel observations: a single SED for the MS and another one for SB, getting warmer with redshift. Our model is able to reproduce recent measurements of galaxy counts performed with Herschel, including counts per redshift slice. This agreement demonstrates the power of our 2-Star-Formation Modes (2SFM) decomposition in describing the statistical properties of infrared sources and their evolution with cosmic time. We discuss the relative contribution of MS and SB galaxies to the number counts at various wavelengths and flux densities. We also show that MS galaxies are responsible for a bump in the 1.4 GHz radio counts around 50 μJy. 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We rely on a simple\nspectral energy distribution (SED) library based on Herschel\nobservations: a single SED for the MS and another one for SB, getting\nwarmer with redshift. Our model is able to reproduce recent measurements\nof galaxy counts performed with Herschel, including counts per redshift\nslice. This agreement demonstrates the power of our 2-Star-Formation\nModes (2SFM) decomposition in describing the statistical properties of\ninfrared sources and their evolution with cosmic time. We discuss the\nrelative contribution of MS and SB galaxies to the number counts at\nvarious wavelengths and flux densities. 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