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  • NAM2017
    • Timetable
    • Delegates
    • Registration
  • Science
    • Parallel sessions
    • Plenary talks
    • Posters
    • Publishing workshop
    • Media workshop
    • Community forum
    • Special lunches
    • Hack day
  • Social
    • Welcome reception
    • Conference dinner
    • Football + BBQ evening
  • Outreach
    • Public talk
    • Outreach day
    • Media
  • Hull
    • Travel
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    • Going out
    • Childcare
  • Contacts

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Abstract details

id
The H-alpha luminosity-dependent clustering of star-forming galaxies with HiZELS
Date Submitted
2017-04-21 12:50:42
GalEnv
Rachel Cochrane
Institute for Astronomy, University of Edinburgh
Poster
P. N. Best (Edinburgh), D. Sobral (Lancaster)
In this talk I will present a detailed analysis of star-forming galaxies and their host dark matter halo environments over cosmic time using galaxy clustering. The deep near-infrared narrow-band survey HiZELS has yielded identically-selected samples of Ha emitters at 3 epochs spanning the decline of the cosmic star formation rate density (z=0.8, z=1.5 and z=2.2). Narrow-band samples have well-defined redshift distributions and are therefore ideal for clustering analyses. We probe the clustering of typical star-forming galaxies on and above the main sequence back ~11Gyr. At individual epochs, our samples are large enough to bin by both star formation rate and stellar mass. Fitting two-point correlation functions with sophisticated dark matter halo models, we constrain effective halo masses and central/satellite fractions as a function of star formation rate, stellar mass and cosmic epoch. Typical Ha-emitting galaxies in the redshift range z = 0.8-2.2 are star-forming centrals, residing in host halos of mass ~10^12M_sun. We find a strong, redshift-independent relationship between scaled galaxy luminosity L(Ha)/L*(Ha) and dark matter halo mass. Our results reveal halo environment as a strong driver of galaxy star-formation rate and the evolution of the luminosity function over cosmic time.

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