nIFTy cosmology: The clustering consistency of galaxy formation models

We present a clustering comparison of 12 galaxy formation models [including semi-analytic models (SAMs) and halo occupation distribution (HOD) models] all run on halo catalogues and merger trees extracted from a single Λ cold dark matter N-body simulation. We compare the results of the measurements...

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Autores principales: Pujol, Arnau, Skibba, Ramin A., Gaztañaga, Enrique, Benson, Andrew, Blaizot, Jeremy, Bower, Richard, Carretero, Jorge, Castander, Francisco J., Cattaneo, Andrea, Cora, Sofía Alejandra, 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 Daniel, Gonzalez Perez, Violeta, Helly, John, Henriques, Bruno M. B., Hirschmann, Michaela, Knebe, Alexander, Lee, Jaehyun, Mamon, Gary A., Monaco, Pierluigi, Onions, Julian, Padilla, Nelson D., Pearce, Frazer R., Power, Chris, Somerville, Rachel S., Srisawat, Chaichalit, Thomas, Peter A., Tollet, Edouard, Vega Martínez, Cristian Antonio, Yi, Sukyoung K.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2017
Materias:
Ciencias Astronómicas
methods: numerical
galaxies: haloes
cosmology: theory
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/126670
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-126670
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
methods: numerical
galaxies: haloes
cosmology: theory
spellingShingle Ciencias Astronómicas
methods: numerical
galaxies: haloes
cosmology: theory
Pujol, Arnau
Skibba, Ramin A.
Gaztañaga, Enrique
Benson, Andrew
Blaizot, Jeremy
Bower, Richard
Carretero, Jorge
Castander, Francisco J.
Cattaneo, Andrea
Cora, Sofía Alejandra
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 Daniel
Gonzalez Perez, Violeta
Helly, John
Henriques, Bruno M. B.
Hirschmann, Michaela
Knebe, Alexander
Lee, Jaehyun
Mamon, Gary A.
Monaco, Pierluigi
Onions, Julian
Padilla, Nelson D.
Pearce, Frazer R.
Power, Chris
Somerville, Rachel S.
Srisawat, Chaichalit
Thomas, Peter A.
Tollet, Edouard
Vega Martínez, Cristian Antonio
Yi, Sukyoung K.
nIFTy cosmology: The clustering consistency of galaxy formation models
topic_facet Ciencias Astronómicas
methods: numerical
galaxies: haloes
cosmology: theory
description We present a clustering comparison of 12 galaxy formation models [including semi-analytic models (SAMs) and halo occupation distribution (HOD) models] all run on halo catalogues and merger trees extracted from a single Λ cold dark matter N-body simulation. We compare the results of the measurements of the mean halo occupation numbers, the radial distribution of galaxies in haloes and the two-point correlation functions (2PCF). We also study the implications of the different treatments of orphan (galaxies not assigned to any dark matter subhalo) and non-orphan galaxies in these measurements. Our main result is that the galaxy formation models generally agree in their clustering predictions but they disagree significantly between HOD and SAMs for the orphan satellites. Although there is a very good agreement between the models on the 2PCF of central galaxies, the scatter between the models when orphan satellites are included can be larger than a factor of 2 for scales smaller than 1 h−1 Mpc. We also show that galaxy formation models that do not include orphan satellite galaxies have a significantly lower 2PCF on small scales, consistent with previous studies. Finally, we show that the 2PCF of orphan satellites is remarkably different between SAMs and HOD models. Orphan satellites in SAMs present a higher clustering than in HOD models because they tend to occupy more massive haloes. We conclude that orphan satellites have an important role on galaxy clustering and they are the main cause of the differences in the clustering between HOD models and SAMs.
format Articulo
Articulo
author Pujol, Arnau
Skibba, Ramin A.
Gaztañaga, Enrique
Benson, Andrew
Blaizot, Jeremy
Bower, Richard
Carretero, Jorge
Castander, Francisco J.
Cattaneo, Andrea
Cora, Sofía Alejandra
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 Daniel
Gonzalez Perez, Violeta
Helly, John
Henriques, Bruno M. B.
Hirschmann, Michaela
Knebe, Alexander
Lee, Jaehyun
Mamon, Gary A.
Monaco, Pierluigi
Onions, Julian
Padilla, Nelson D.
Pearce, Frazer R.
Power, Chris
Somerville, Rachel S.
Srisawat, Chaichalit
Thomas, Peter A.
Tollet, Edouard
Vega Martínez, Cristian Antonio
Yi, Sukyoung K.
author_facet Pujol, Arnau
Skibba, Ramin A.
Gaztañaga, Enrique
Benson, Andrew
Blaizot, Jeremy
Bower, Richard
Carretero, Jorge
Castander, Francisco J.
Cattaneo, Andrea
Cora, Sofía Alejandra
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 Daniel
Gonzalez Perez, Violeta
Helly, John
Henriques, Bruno M. B.
Hirschmann, Michaela
Knebe, Alexander
Lee, Jaehyun
Mamon, Gary A.
Monaco, Pierluigi
Onions, Julian
Padilla, Nelson D.
Pearce, Frazer R.
Power, Chris
Somerville, Rachel S.
Srisawat, Chaichalit
Thomas, Peter A.
Tollet, Edouard
Vega Martínez, Cristian Antonio
Yi, Sukyoung K.
author_sort Pujol, Arnau
title nIFTy cosmology: The clustering consistency of galaxy formation models
title_short nIFTy cosmology: The clustering consistency of galaxy formation models
title_full nIFTy cosmology: The clustering consistency of galaxy formation models
title_fullStr nIFTy cosmology: The clustering consistency of galaxy formation models
title_full_unstemmed nIFTy cosmology: The clustering consistency of galaxy formation models
title_sort nifty cosmology: the clustering consistency of galaxy formation models
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/126670
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