651. nIFTy cosmology: comparison of galaxy formation models
- Author
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Darren J. Croton, Ramin A. Skibba, John C. Helly, Sukyoung K. Yi, Julien Devriendt, Daniel Cunnama, J. Carretero, Michaela Hirschmann, Ignacio D. Gargiulo, Richard G. Bower, Pascal J. Elahi, Violeta Gonzalez-Perez, Chaichalit Srisawat, Gary A. Mamon, Andrew J. Benson, Alexander Knebe, Jaehyun Lee, Weiguang Cui, Rachel S. Somerville, Sofía A. Cora, Andreea S. Font, Nelson Padilla, Andrea Cattaneo, Francisco J. Castander, Frazer R. Pearce, Peter A. Thomas, Arnau Pujol, Julian Onions, Jeremy Blaizot, Bruno M. B. Henriques, Chris Power, Gabriella De Lucia, Fabio Fontanot, Juan Garcia-Bellido, Pierluigi Monaco, Cristian A Vega-Martínez, Centre de Recherche Astrophysique de Lyon (CRAL), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institute for Computational Cosmology (ICC), Durham University, Institut de Ciencies de l'Espai [Barcelona] (ICE-CSIC), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Galaxies, Etoiles, Physique, Instrumentation (GEPI), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Heidelberger Institut für Theoretische Studien (H-ITS), Departamento de Fisica Teorica, Universidad Autónoma de Madrid (UAM), Institut d'Astrophysique de Paris (IAP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), James Watt School of Engineering [Univ Glasgow], University of Glasgow, Università degli studi di Trieste = University of Trieste, Centre for Paediatric Epidemiology and Biostatistics, University College of London [London] (UCL), Département d'Astrophysique (ex SAP) (DAP), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Rutgers University [Camden], Rutgers University System (Rutgers), Knebe, Alexander, Pearce, Frazer R., Thomas, Peter A., Benson, Andrew, Blaizot, Jeremy, Bower, Richard, Carretero, Jorge, Castander, Francisco J., Cattaneo, Andrea, Cora, Sofia A., Croton, Darren J., Cui, Weiguang, Cunnama, Daniel, De Lucia, Gabriella, Devriendt, Julien E., Elahi, Pascal J., Font, Andreea, Fontanot, Fabio, Garcia Bellido, Juan, Gargiulo, Ignacio D., Gonzalez Perez, Violeta, Helly, John, Henriques, Bruno, Hirschmann, Michaela, Lee, Jaehyun, Mamon, Gary A., Monaco, Pierluigi, Onions, Julian, Padilla, Nelson D., Power, Chri, Pujol, Arnau, Skibba, Ramin A., Somerville, Rachel S., Srisawat, Chaichalit, Vega Martínez, Cristian A., Yi, Sukyoung K., UAM. Departamento de Física Teórica, École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Universidad Autonoma de Madrid (UAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Dipartimento di Fisica, Università degli Studi di Trieste, and Università degli studi di Trieste
- Subjects
Ciencias Astronómicas ,Stellar mass ,haloes [Galaxies] ,Calibration (statistics) ,Ciencias Físicas ,Dark matter ,FOS: Physical sciences ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Halo occupation distribution ,Cosmology ,haloe [Galaxies] ,purl.org/becyt/ford/1 [https] ,theory [Cosmology] ,analytical [Methods] ,Galaxy formation and evolution ,N-body simulations ,Galaxies: haloes ,Methods: analytical ,Evolution of galaxies ,Cosmology: theory ,Galaxies: evolution ,Methods: numerical ,Space and Planetary Science ,Astronomy and Astrophysics ,Astrophysics::Galaxy Astrophysics ,QB ,Physics ,numerical [Methods] ,[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] ,Star formation ,Astronomy ,Física ,purl.org/becyt/ford/1.3 [https] ,evolution [Galaxies] ,Astrophysics - Astrophysics of Galaxies ,Galaxy ,Haloes ,Astronomía ,[SDU]Sciences of the Universe [physics] ,Astrophysics of Galaxies (astro-ph.GA) ,CIENCIAS NATURALES Y EXACTAS - 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., La lista completa de autores que integran el documento puede consultarse en el archivo., Instituto de Astrofísica de La Plata, Facultad de Ciencias Astronómicas y Geofísicas
- Published
- 2015