Wilkins, Stephen M, Feng, Yu, Di Matteo, Tiziana, Croft, Rupert, Lovell, Christopher C and Waters, Dacen (2017) The properties of the first galaxies in the BlueTides simulation. Monthly Notices of the Royal Astronomical Society, 469 (3). pp. 2517-2530. ISSN 0035-8711

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Abstract

We employ the very large cosmological hydrodynamical simulation BlueTides to investigate the predicted properties of the galaxy population during the epoch of reionization (z > 8). BlueTides has a resolution and volume ((400/h ≈ 577)3 cMpc3) providing a population of galaxies that is well matched to depth and area of current observational surveys targeting the high-redshift Universe. At z = 8, BlueTides includes almost 160 000 galaxies with stellar masses >108 M⊙. The population of galaxies predicted by BlueTides closely matches observational constraints on both the galaxy stellar mass function and far-UV (150 nm) luminosity function. Galaxies in BlueTides are characterized by rapidly increasing star formation histories. Specific star formation rates decrease with redshift though remain largely insensitive to stellar mass. As a result of the enhanced surface density of metals, more massive galaxies are predicted to have higher dust attenuation resulting in a significant steepening of the observed far-UV luminosity function at high luminosities. The contribution of active supermassive black holes (SMBHs) to the UV luminosities of galaxies with stellar masses 109–10 M⊙ is around 3 per cent on average. Approximately 25 per cent of galaxies with M∗ ≈ 1010 M⊙ are predicted to have active SMBHs that contribute >10 per cent of the total UV luminosity.

Item Type:	Article
Schools and Departments:	School of Mathematical and Physical Sciences > Physics and Astronomy
Research Centres and Groups:	Astronomy Centre
Subjects:	Q Science > QB Astronomy
Depositing User:	Billy Wichaidit
Date Deposited:	06 Jun 2017 11:59
Last Modified:	06 Jun 2017 12:05
URI:	http://sro.sussex.ac.uk/id/eprint/68371

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