Journal article
The brightest galaxies at cosmic dawn from scatter in the galaxy luminosity versus halo mass relation
K Ren, M Trenti, CA Mason
Astrophysical Journal | IOP Publishing Ltd | Published : 2019
Abstract
The Ultraviolet Luminosity Function (UVLF) is a key observable for understanding galaxy formation from cosmic dawn. There has been considerable debate on whether Schechter-like LFs (characterized by an exponential dropoff at the bright end) that describe the LF in our local universe are also a sufficient description of the LF at high redshifts (z > 6). We model the UVLF over cosmic history with a semi-empirical framework and include a log-normal scatter, Σ, in galaxy luminosities with a conditional luminosity function approach. We show that stochasticity induces a flattening or a feedback scale in the median galaxy luminosity versus halo mass relation, L c (M h ), to account for the increase..
View full abstractRelated Projects (1)
Grants
Awarded by Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D)
Awarded by NASA Hubble Fellowship - Space Telescope Science Institute
Awarded by NASA
Funding Acknowledgements
We thank the referee for their valuable input to this manuscript. We include a special thanks to M. Ishigaki for kindly providing the data for their luminosity functions. In addition, we are also grateful to P. Behroozi and A. Melatos for their helpful discussions on methods of deconvolution. This research was conducted by the Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), through project number CE170100013. K.R. is additionally supported through the Research Training Program Scholarship from the Australian Government. C.M. acknowledges support through the NASA Hubble Fellowship grant HST-HF2-51413.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS5-26555.