Browsing Faculty of Natural Sciences by Subject "Formation"

Now showing items 1-7 of 7

    • Aligned metal absorbers and the ultraviolet background at the end of reionization 

      Doughty, Caitlin; Finlator, Kristian; Oppenheimer, Benjamin D.; Dave, Romeel; Zackrisson, Erik (Oxford University Press, 2018)
      We use observations of spatially-aligned C ii, C iv, Si ii, Si iv, and O i absorbers to probe the slope and intensity of the ultraviolet background (UVB) at z ∼ 6. We accom- plish this by comparing observations with ...

    • Calibrating the James Webb Space telescope filters as star formation rate indicators 

      Senarath, Madhooshi R.; Brown, Michael J. I.; Cluver, Michelle E.; Moustakas, John; Armus, Lee; Jarrett, Thomas H. (American Astronomical Society, 2018)
      We have calibrated the 6.5m James Webb Space Telescope (JWST) mid-infrared (MIR) filters as star formation rate (SFR) indicators, using JWST photometry synthesized from Spitzer spectra of 49 low-redshift galaxies, which ...

    • Galaxy And Mass Assembly (GAMA): spectroscopic analysis 

      Hopkins, A.M.; Driver, S.P.; Brough, S.; Jarvis, Matt (Oxford University Press, 2013)
      The Galaxy And Mass Assembly (GAMA) survey is a multiwavelength photometric and spectroscopic survey, using the AAOmega spectrograph on the Anglo-Australian Telescope to obtain spectra for up to _ 300 000 galaxies over ...

    • Mufasa: The assembly of the red sequence 

      Dave, Romeel; Rafieferantso, Mika H.; Thompson, Robert J. (Oxford University Press, 2017)
      We examine the growth and evolution of quenched galaxies in the Mufasa cosmo- logical hydrodynamic simulations that include an evolving halo mass-based quench- ing prescription, with galaxy colours computed accounting ...

    • MUFASA: The strength and evolution of galaxy conformity in various tracers 

      Rafieferantsoa, Mika H.; Dave, Romeel (Oxford University Press, 2017)
      We investigate galaxy conformity using the Mufasa cosmological hydrodynamical simulation. We show a bimodal distribution in galaxy colour with radius, albeit with too many low-mass quenched satellite galaxies compared ...

    • Radio continuum surveys with square kilometre array pathfinders 

      Norris, Ray P.; Afonso, J.; Bacon, David; Cress, Catherine (Cambridge University Press, 2013)
      In the lead-up to the Square Kilometre Array (SKA) project, several next-generation radio telescopes and upgrades are already being built around the world. These include APERTIF (The Netherlands), ASKAP (Australia), ...

    • VLT/XSHOOTER & Subaru/MOIRCS spectroscopy of HUDF-YD3: No evidence for Lyman-alpha emission at z=8.55 

      Bunker, Andrew J.; Caruana, Joseph; Wilkins, Stephen M.; Jarvis, Matt (Oxford University Press, 2013)
      We present spectroscopic observations with VLT/XSHOOTER and Subaru/MOIRCS of a relatively bright Y -band drop-out galaxy in the Hubble Ultra Deep Field, first selected by Bunker et al. (2010), McLure et al. (2010) and ...