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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
    • Accommodation
    • Going out
    • Childcare
  • Contacts

Schedule by Session

Abstract
id
Modern Morphologies: 10 Years of Galaxy Zoo
Blue vs. Red morphological evolution of star-forming galaxies
Date Submitted
Ana Paulino-Afonso
David Sobral (Lancaster University), Fernando Buitrago (IA-Lisbon) , José Afonso (IA-Lisbon)
Lancaster University
I will present new results about the morphological evolution of Ha-selected star-forming galaxies. Knowing that the perceived evolution can be affected by a range of biases and systematics, we use an artificial redshifting code which includes the luminosity evolution function for Ha to quantify the change on the measured structural parameters with redshift. We run GALFIT on the scientific and simulated images and we find that star-forming galaxies have grown on average by a factor 2-3 and have Sérsic indices close to pure exponential disks (n~1.2) from z=2.23 to z=0. We trace the rest-frame blue/UV light and we believe that we are witnessing the growth of regions where star-formation occurs in galaxies. These results (Paulino-Afonso et al., 2017) contrast with the ones found by Stott et al. (2013) where, using red/NIR data and the same high-redshift sample, a mild to no evolution trend in galaxies sizes is shown. Why have we not a common view? Do young and old stellar populations evolve in different ways? Do we still need to look at morphology to understand galaxy evolution?
Schedule
id
Wednesday
date time
09:00 - 10:30
09.30
Abstract

Wilberforce LT-28

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