MNRAS-2015-Knebe-4029-59.pdf (2.3 MB)
nIFTy cosmology: comparison of galaxy formation models
journal contribution
posted on 2023-06-08, 22:55 authored by Alexander Knebe, Frazer R Pearce, Peter ThomasPeter Thomas, Andrew Benson, Jeremy Blaizot, Richard Bower, Jorge Carretero, Francisco J Castander, Andrea Cattaneo, Sofia A Cora, Darren J Croton, Weiguang Cui, Daniel Cunnama, Gabriella De Lucia, Julien E Devriendt, Pascal J Elahi, Andreea Font, Fabio Fontanot, Juan Garcia-Bellido, Ignacio D Gargiulo, Violeta Gonzalez-Perez, John Helly, Bruno Henriques, Michaela Hirschmann, Jaehyun Lee, Gary A Mamon, Pierluigi Monaco, Julian Onions, Nelson D Padilla, Chris Power, Arnau Pujol, Ramin A Skibba, Rachel S Somerville, Chaichalit Srisawat, Cristian A Vega-Martínez, Sukyoung K YiWe present a comparison of 14 galaxy formation models: 12 different semi-analytical models and 2 halo occupation distribution models for galaxy formation based upon the same cosmo- logical simulation and merger tree information derived from it. The participating codes have proven to be very successful in their own right but they have all been calibrated independently using various observational data sets, stellar models, and merger trees. In this paper, we apply them without recalibration and this leads to a wide variety of predictions for the stellar mass function, specific star formation rates, stellar-to-halo mass ratios, and the abundance of orphan galaxies. The scatter is much larger than seen in previous comparison studies primarily be- cause the codes have been used outside of their native environment within which they are well tested and calibrated. The purpose of the ‘nIFTy comparison of galaxy formation models’ is to bring together as many different galaxy formation modellers as possible and to investigate a common approach to model calibration. This paper provides a unified description for all participating models and presents the initial, uncalibrated comparison as a baseline for our future studies where we will develop a common calibration framework and address the extent to which that reduces the scatter in the model predictions seen here.
Funding
Additional AGP funding - supplementary to Sussex Consolidated Grant ST/L000652/1; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/L000652/1
History
Publication status
- Published
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- Published version
Journal
Monthly Notices of the Royal Astronomical SocietyISSN
0035-8711Publisher
Oxford University PressExternal DOI
Issue
4Volume
451Page range
4029-4059Department affiliated with
- Physics and Astronomy Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2015-10-22First Open Access (FOA) Date
2015-10-22First Compliant Deposit (FCD) Date
2015-10-22Usage metrics
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