MNRAS-2016-Wilkins-3170-8.pdf (656.37 kB)
The photometric properties of galaxies in the early universe
journal contribution
posted on 2023-06-09, 02:52 authored by Stephen WilkinsStephen Wilkins, Yu Feng, Tiziana Di-Matteo, Rupert Croft, Elizabeth R Stanway, Andrew Bunker, Dacen Waters, Christopher LovellWe use the large cosmological hydro-dynamic simulation BlueTides to predict the photometric properties of galaxies during the epoch of reionization (z = 8–15). These properties include the rest-frame UV to near-IR broad-band spectral energy distributions, the Lyman continuum (LyC) photon production, the UV star formation rate calibration, and intrinsic UV continuum slope. In particular we focus on exploring the effect of various modelling assumptions, including the assumed choice of stellar population synthesis (SPS) model, initial mass function, and the escape fraction of LyC photons, upon these quantities. We find that these modelling assumptions can have a dramatic effect on photometric properties leading to consequences for the accurate determination of physical properties from observations. For example, at z = 8 we predict that nebular emission can account for up to 50?per?cent of the rest-frame R-band luminosity, while the choice of SPS model can change the LyC production rate up to a factor of ×2.
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Publication status
- Published
File Version
- Published version
Journal
Monthly Notices of the Royal Astronomical SocietyISSN
0035-8711Publisher
Oxford University PressExternal DOI
Issue
3Volume
460Page range
3170-3178Department affiliated with
- Physics and Astronomy Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2016-09-13First Open Access (FOA) Date
2016-09-13First Compliant Deposit (FCD) Date
2016-09-13Usage metrics
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