We 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 cosmological 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 because 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.
Description
[1505.04607] nIFTy Cosmology: Comparison of Galaxy Formation Models
%0 Generic
%1 knebe2015nifty
%A Knebe, Alexander
%A Pearce, Frazer R.
%A Thomas, Peter A.
%A Benson, Andrew
%A Blaizot, Jeremy
%A Bower, Richard
%A Carretero, Jorge
%A Castander, Francisco J.
%A Cattaneo, Andrea
%A Cora, Sofia A.
%A Croton, Darren J.
%A Cui, Weiguang
%A Cunnama, Daniel
%A De Lucia, Gabriella
%A Devriendt, Julien E.
%A Elahi, Pascal J.
%A Font, Andreea
%A Fontanot, Fabio
%A Garcia-Bellido, Juan
%A Gargiulo, Ignacio D.
%A Gonzalez-Perez, Violeta
%A Helly, John
%A Henriques, Bruno
%A Hirschmann, Michaela
%A Lee, Jaehyun
%A Mamon, Gary A.
%A Monaco, Pierluigi
%A Onions, Julian
%A Padilla, Nelson D.
%A Power, Chris
%A Pujol, Arnau
%A Skibba, Ramin A.
%A Somerville, Rachel S.
%A Srisawat, Chaichalit
%A Vega-Martinez, Cristian A.
%A Yi, Sukyoung K.
%D 2015
%K formation galaxy models
%T nIFTy Cosmology: Comparison of Galaxy Formation Models
%U http://arxiv.org/abs/1505.04607
%X We 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 cosmological 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 because 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.
@misc{knebe2015nifty,
abstract = {We 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 cosmological 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 because 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.},
added-at = {2015-05-19T10:07:52.000+0200},
author = {Knebe, Alexander and Pearce, Frazer R. and Thomas, Peter A. and Benson, Andrew and Blaizot, Jeremy and Bower, Richard and Carretero, Jorge and Castander, Francisco J. and Cattaneo, Andrea and Cora, Sofia A. and Croton, Darren J. and Cui, Weiguang and Cunnama, Daniel and De Lucia, Gabriella and Devriendt, Julien E. and Elahi, Pascal J. and Font, Andreea and Fontanot, Fabio and Garcia-Bellido, Juan and Gargiulo, Ignacio D. and Gonzalez-Perez, Violeta and Helly, John and Henriques, Bruno and Hirschmann, Michaela and Lee, Jaehyun and Mamon, Gary A. and Monaco, Pierluigi and Onions, Julian and Padilla, Nelson D. and Power, Chris and Pujol, Arnau and Skibba, Ramin A. and Somerville, Rachel S. and Srisawat, Chaichalit and Vega-Martinez, Cristian A. and Yi, Sukyoung K.},
biburl = {https://www.bibsonomy.org/bibtex/29b8354a06234d668496e184010a98084/miki},
description = {[1505.04607] nIFTy Cosmology: Comparison of Galaxy Formation Models},
interhash = {dcdcdf541e148241227ad33802835a5c},
intrahash = {9b8354a06234d668496e184010a98084},
keywords = {formation galaxy models},
note = {cite arxiv:1505.04607Comment: 35 pages, 20 figures, accepted for publication in MNRAS},
timestamp = {2015-05-19T10:07:52.000+0200},
title = {nIFTy Cosmology: Comparison of Galaxy Formation Models},
url = {http://arxiv.org/abs/1505.04607},
year = 2015
}