Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 490, Issue 4, Pages 5182-5195Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stz2969
Keywords
methods: numerical; galaxies: formation; galaxies: haloes
Categories
Funding
- National Key Program for Science and Technology Research Development [2017YFB0203300]
- NSFC [11133003, 11425312, 11573033, 11622325]
- Newton Advanced Fellowship
- European Research Council (ERC) [GA 786910]
- CONICYT through the project FONDECYT Regular [1181264]
- Max Planck Society
- Italian MIUR
- STFC [ST/L00075X/1, ST/P000541/1, ST/H008519/1, ST/K003267/1]
- BIS National E-infrastructure capital grant [ST/K00042X/1]
- Durham University
- HPC Infrastructure for Grand Challenges of Science and Engineering Project - European Regional Development Fund under the Innovative Economy Operational Programme
- [ERC-StG-716532-PUNCA]
- STFC [ST/T001550/1, ST/T001348/1, ST/T001569/1, ST/R001014/1, ST/R001049/1, ST/M007618/1, ST/R000832/1, ST/R00689X/1, ST/T001372/1, ST/S002529/1, ST/M007065/1, ST/M007006/1, ST/R001006/1, ST/P000541/1, ST/M007073/1, ST/M006948/1] Funding Source: UKRI
Ask authors/readers for more resources
We investigate the formation of ultra-diffuse galaxies (UDGs) using the Auriga high-resolution cosmological magnetohydrodynamical simulations of Milky Way-sized galaxies. We identify a sample of 92 UDGs in the simulations that match a wide range of observables such as sizes, central surface brightness, Sersic indices, colours, spatial distribution, and abundance. Auriga UDGs have dynamical masses similar to normal dwarfs. In the field, the key to their origin is a strong correlation present in low-mass dark matter haloes between galaxy size and halo spin parameter. Field UDGs form in dark matter haloes with larger spins compared to normal dwarfs in the field, in agreement with previous semi-analytical models. Satellite UDGs, on the other hand, have two different origins: similar to 55 per cent of them formed as field UDGs before they were accreted; the remaining similar to 45 per cent were normal field dwarfs that subsequently turned into UDGs as a result of tidal interactions.
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