TY - JOUR
T1 - The H $ luminosity-dependent clustering of star-forming galaxies from z tilde 0.8 to tilde2.2 with HiZELS
AU - Cochrane, R.~K.
AU - Best, P.~N.
AU - Sobral, D.
AU - Smail, I.
AU - Wake, D.~A.
AU - Stott, J.~P.
AU - Geach, J.~E.
N1 - © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.
PY - 2017/8/11
Y1 - 2017/8/11
N2 - We present clustering analyses of identically selected star-forming galaxies in three narrow redshift slices (at z = 0.8, 1.47 and 2.23), from the High-Redshift(Z) Emission Line Survey (HiZELS), a deep, near-infrared narrow-band survey. The HiZELS samples span the peak in the cosmic star formation rate density, identifying typical star-forming galaxies at each epoch. Narrow-band samples have well-defined redshift distributions and are therefore ideal for clustering analyses. We quantify the clustering of the three samples, and of H α luminosity-selected subsamples, initially using simple power-law fits to the two-point correlation function. We extend this work to link the evolution of star-forming galaxies and their host dark matter haloes over cosmic time using sophisticated dark matter halo models. We find that the clustering strength, r0, and the bias of galaxy populations relative to the clustering of dark matter increase linearly with H α luminosity (and, by implication, star formation rate) at all three redshifts, as do the host dark matter halo masses of the HiZELS galaxies. The typical galaxies in our samples are star-forming centrals, residing in haloes of mass Mhalo ∼ a few times 1012 M⊙. We find a remarkably tight redshift-independent relation between the H α luminosity scaled by the characteristic luminosity, LHα/L∗Hα(z), and the minimum host dark matter halo mass of central galaxies. This reveals that the dark matter halo environment is a strong driver of galaxy star formation rate and therefore of the evolution of the star formation rate density in the Universe.
AB - We present clustering analyses of identically selected star-forming galaxies in three narrow redshift slices (at z = 0.8, 1.47 and 2.23), from the High-Redshift(Z) Emission Line Survey (HiZELS), a deep, near-infrared narrow-band survey. The HiZELS samples span the peak in the cosmic star formation rate density, identifying typical star-forming galaxies at each epoch. Narrow-band samples have well-defined redshift distributions and are therefore ideal for clustering analyses. We quantify the clustering of the three samples, and of H α luminosity-selected subsamples, initially using simple power-law fits to the two-point correlation function. We extend this work to link the evolution of star-forming galaxies and their host dark matter haloes over cosmic time using sophisticated dark matter halo models. We find that the clustering strength, r0, and the bias of galaxy populations relative to the clustering of dark matter increase linearly with H α luminosity (and, by implication, star formation rate) at all three redshifts, as do the host dark matter halo masses of the HiZELS galaxies. The typical galaxies in our samples are star-forming centrals, residing in haloes of mass Mhalo ∼ a few times 1012 M⊙. We find a remarkably tight redshift-independent relation between the H α luminosity scaled by the characteristic luminosity, LHα/L∗Hα(z), and the minimum host dark matter halo mass of central galaxies. This reveals that the dark matter halo environment is a strong driver of galaxy star formation rate and therefore of the evolution of the star formation rate density in the Universe.
KW - galaxies: evolution, galaxies: haloes, galaxies: high-redshift, large-scale structure of Universe, galaxies: evolution - galaxies: haloes
U2 - 10.1093/mnras/stx957
DO - 10.1093/mnras/stx957
M3 - Article
SN - 0035-8711
VL - 469
SP - 2913
EP - 2932
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
ER -