Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 483, Issue 4, Pages 4922-4937Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/sty3427
Keywords
galaxies: formation; galaxies: haloes; cosmology: theory
Categories
Funding
- Science and Technology Facilities Council [ST/P000541/1]
- BIS National E-infrastructure capital grant [ST/K00042X/1]
- STFC capital grant [ST/H008519/1]
- STFC DiRAC Operations grant [ST/K003267/1]
- Durham University
- STFC [ST/M006948/1, ST/R00689X/1, ST/T001550/1, ST/S002529/1, ST/M007065/1, ST/M007006/1, ST/R001049/1, ST/M007618/1, ST/I00162X/1, ST/H008519/1, ST/R000832/1, ST/K00042X/1, ST/T001372/1, ST/P000541/1, ST/R001006/1, ST/T001569/1, ST/M007073/1, ST/R001014/1, ST/T001348/1] Funding Source: UKRI
Ask authors/readers for more resources
We present recalibrations of the GALFORM semi-analytical model of galaxy formation in a new N-body simulation with the Planck cosmology. The Planck Millennium simulation uses more than 128 billion particles to resolve the matter distribution in a cube of 800 Mpc on a side, which contains more than 77 million dark matter haloes with mass greater than 2.12 x 10(9) h(-1) M-circle dot at this day. Only minor changes to a very small number of model parameters are required in the recalibration. We present predictions for the atomic hydrogen content (H I) of dark matter haloes, which is a key input into the calculation of the H I intensity mapping signal expected from the large-scale structure of the Universe. We find that the H I mass-halo mass relation displays a clear break at the halo mass above which AGN heating suppresses gas cooling, approximate to 3 x 10(11)h(-1) M-circle dot. Below this halo mass, the H I content of haloes is dominated by the central galaxy; above this mass it is the combined H I content of satellites that prevails. We find that the H I mass-halo mass relation changes little with redshift up to z = 3. The bias of H I sources shows a scale dependence that gets more pronounced with increasing redshift.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available