PROBING THE ULTRAVIOLET LUMINOSITY FUNCTION OF THE EARLIEST GALAXIES WITH THE RENAISSANCE SIMULATIONS. O'Shea, B. W., Wise, J. H., Xu, H., & Norman, M. L. The Astrophysical Journal, 807(1):L12, June, 2015. Publisher: IOP Publishing
Paper doi abstract bibtex In this paper, we present the first results from the Renaissance Simulations, a suite of extremely high-resolution and physics-rich AMR calculations of high-redshift galaxy formation performed on the Blue Waters supercomputer. These simulations contain hundreds of well-resolved galaxies at , and make several novel, testable predictions. Most critically, we show that the ultraviolet luminosity function of our simulated galaxies is consistent with observations of high-z galaxy populations at the bright end of the luminosity function , but at lower luminosities is essentially flat rather than rising steeply, as has been inferred by Schechter function fits to high-z observations, and has a clearly defined lower limit in UV luminosity. This behavior of the luminosity function is due to two factors: (i) the strong dependence of the star formation rate (SFR) on halo virial mass in our simulated galaxy population, with lower-mass halos having systematically lower SFRs and thus lower UV luminosities; and (ii) the fact that halos with virial masses below do not universally contain stars, with the fraction of halos containing stars dropping to zero at . Finally, we show that the brightest of our simulated galaxies may be visible to current and future ultra-deep space-based surveys, particularly if lensed regions are chosen for observation.
@article{oshea_probing_2015,
title = {{PROBING} {THE} {ULTRAVIOLET} {LUMINOSITY} {FUNCTION} {OF} {THE} {EARLIEST} {GALAXIES} {WITH} {THE} {RENAISSANCE} {SIMULATIONS}},
volume = {807},
issn = {2041-8205},
url = {https://doi.org/10.1088%2F2041-8205%2F807%2F1%2Fl12},
doi = {10.1088/2041-8205/807/1/L12},
abstract = {In this paper, we present the first results from the Renaissance Simulations, a suite of extremely high-resolution and physics-rich AMR calculations of high-redshift galaxy formation performed on the Blue Waters supercomputer. These simulations contain hundreds of well-resolved galaxies at , and make several novel, testable predictions. Most critically, we show that the ultraviolet luminosity function of our simulated galaxies is consistent with observations of high-z galaxy populations at the bright end of the luminosity function , but at lower luminosities is essentially flat rather than rising steeply, as has been inferred by Schechter function fits to high-z observations, and has a clearly defined lower limit in UV luminosity. This behavior of the luminosity function is due to two factors: (i) the strong dependence of the star formation rate (SFR) on halo virial mass in our simulated galaxy population, with lower-mass halos having systematically lower SFRs and thus lower UV luminosities; and (ii) the fact that halos with virial masses below do not universally contain stars, with the fraction of halos containing stars dropping to zero at . Finally, we show that the brightest of our simulated galaxies may be visible to current and future ultra-deep space-based surveys, particularly if lensed regions are chosen for observation.},
language = {en},
number = {1},
urldate = {2020-03-23},
journal = {The Astrophysical Journal},
author = {O'Shea, Brian W. and Wise, John H. and Xu, Hao and Norman, Michael L.},
month = jun,
year = {2015},
note = {Publisher: IOP Publishing},
pages = {L12},
}
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