Comparison of the VIMOS-VLT Deep Survey with the Munich semi-analytical model: I. Magnitude counts, redshift distribution, colour bimodality,and galaxy clustering

S. De La Torre, B. Meneux, G. De Lucia, J. Blaizot, O. Le Fèvre, B. Garilli, O. Cucciati, Y. Mellier, A. Pollo, U. Abbas, D. Bottini, V. Le Brun, D. MacCagni, M. Scodeggio, L. Tresse, G. Vettolani, A. Zanichelli, C. Adami, S. Arnouts, S. BardelliM. Bolzonella, A. Cappi, S. Charlot, P. Ciliegi, T. Contini, S. Foucaud, P. Franzetti, I. Gavignaud, L. Guzzo, O. Ilbert, A. Iovino, H. J. McCracken, C. Marinoni, A. Mazure, R. Merighi, S. Paltani, R. Pelló, L. Pozzetti, D. Vergani, G. Zamorani, E. Zucca

Resultado de la investigación: Article

1 Cita (Scopus)

Resumen

Aims. This paper presents a detailed comparison between high-redshift observations from the VIMOS-VLT Deep Survey (VVDS) and predictions from the Munich semi-analytical model of galaxy formation. In particular, we focus this analysis on the magnitude, redshift, and colour distributions of galaxies, as well as their clustering properties. Methods. We constructed 100 quasi-independent mock catalogues, using the output of the semi-analytical model presented in De Lucia & Blaizot (2007, MNRAS, 375, 2). We then applied the same observational selection function of the VVDS-Deep survey, so as to carry out a fair comparison between models and observations. Results. We find that the semi-analytical model reproduces well the magnitude counts in the optical bands. It tends, however, to overpredict the abundance of faint red galaxies, in particular in the i' and z' bands. Model galaxies exhibit a colour bimodality that is only in qualitative agreement with the data. In particular, we find that the model tends to overpredict the number of red galaxies at low redshift and of blue galaxies at all redshifts probed by VVDS-Deep observations, although a large fraction of the bluest observed galaxies is absent from the model. In addition, the model overpredicts by about 14 per cent the number of galaxies observed at 0.2 < z < 1 with IAB < 24. When comparing the galaxy clustering properties, we find that model galaxies are more strongly clustered than observed ones at all redshift from z = 0.2 to z = 2, with the difference being less significant above z $\simeq$ 1. When splitting the samples into red and blue galaxies, we find that the observed clustering of blue galaxies is well reproduced by the model, while red model galaxies are much more clustered than observed ones, being principally responsible for the strong global clustering found in the model. Conclusions. Our results show that the discrepancies between Munich semi-analytical model predictions and VVDS-Deep observations, particularly in the galaxy colour distribution and clustering, can be explained to a large extend by an overabundance of satellite galaxies, mostly located in the red peak of the colour bimodality predicted by the model.

Idioma originalEnglish
Número de artículoA125
PublicaciónAstronomy and Astrophysics
Volumen525
N.º7
DOI
EstadoPublished - 7 dic 2010

Huella dactilar

galaxies
color
distribution
comparison
galactic evolution
prediction
predictions
catalogs
output

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Citar esto

De La Torre, S. ; Meneux, B. ; De Lucia, G. ; Blaizot, J. ; Le Fèvre, O. ; Garilli, B. ; Cucciati, O. ; Mellier, Y. ; Pollo, A. ; Abbas, U. ; Bottini, D. ; Le Brun, V. ; MacCagni, D. ; Scodeggio, M. ; Tresse, L. ; Vettolani, G. ; Zanichelli, A. ; Adami, C. ; Arnouts, S. ; Bardelli, S. ; Bolzonella, M. ; Cappi, A. ; Charlot, S. ; Ciliegi, P. ; Contini, T. ; Foucaud, S. ; Franzetti, P. ; Gavignaud, I. ; Guzzo, L. ; Ilbert, O. ; Iovino, A. ; McCracken, H. J. ; Marinoni, C. ; Mazure, A. ; Merighi, R. ; Paltani, S. ; Pelló, R. ; Pozzetti, L. ; Vergani, D. ; Zamorani, G. ; Zucca, E. / Comparison of the VIMOS-VLT Deep Survey with the Munich semi-analytical model : I. Magnitude counts, redshift distribution, colour bimodality,and galaxy clustering. En: Astronomy and Astrophysics. 2010 ; Vol. 525, N.º 7.
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title = "Comparison of the VIMOS-VLT Deep Survey with the Munich semi-analytical model: I. Magnitude counts, redshift distribution, colour bimodality,and galaxy clustering",
abstract = "Aims. This paper presents a detailed comparison between high-redshift observations from the VIMOS-VLT Deep Survey (VVDS) and predictions from the Munich semi-analytical model of galaxy formation. In particular, we focus this analysis on the magnitude, redshift, and colour distributions of galaxies, as well as their clustering properties. Methods. We constructed 100 quasi-independent mock catalogues, using the output of the semi-analytical model presented in De Lucia & Blaizot (2007, MNRAS, 375, 2). We then applied the same observational selection function of the VVDS-Deep survey, so as to carry out a fair comparison between models and observations. Results. We find that the semi-analytical model reproduces well the magnitude counts in the optical bands. It tends, however, to overpredict the abundance of faint red galaxies, in particular in the i' and z' bands. Model galaxies exhibit a colour bimodality that is only in qualitative agreement with the data. In particular, we find that the model tends to overpredict the number of red galaxies at low redshift and of blue galaxies at all redshifts probed by VVDS-Deep observations, although a large fraction of the bluest observed galaxies is absent from the model. In addition, the model overpredicts by about 14 per cent the number of galaxies observed at 0.2 < z < 1 with IAB < 24. When comparing the galaxy clustering properties, we find that model galaxies are more strongly clustered than observed ones at all redshift from z = 0.2 to z = 2, with the difference being less significant above z $\simeq$ 1. When splitting the samples into red and blue galaxies, we find that the observed clustering of blue galaxies is well reproduced by the model, while red model galaxies are much more clustered than observed ones, being principally responsible for the strong global clustering found in the model. Conclusions. Our results show that the discrepancies between Munich semi-analytical model predictions and VVDS-Deep observations, particularly in the galaxy colour distribution and clustering, can be explained to a large extend by an overabundance of satellite galaxies, mostly located in the red peak of the colour bimodality predicted by the model.",
keywords = "Cosmology: observations, Galaxies: evolution, Galaxies: high-redshift, Galaxies: statistics, Large-scale structure of Universe",
author = "{De La Torre}, S. and B. Meneux and {De Lucia}, G. and J. Blaizot and {Le F{\`e}vre}, O. and B. Garilli and O. Cucciati and Y. Mellier and A. Pollo and U. Abbas and D. Bottini and {Le Brun}, V. and D. MacCagni and M. Scodeggio and L. Tresse and G. Vettolani and A. Zanichelli and C. Adami and S. Arnouts and S. Bardelli and M. Bolzonella and A. Cappi and S. Charlot and P. Ciliegi and T. Contini and S. Foucaud and P. Franzetti and I. Gavignaud and L. Guzzo and O. Ilbert and A. Iovino and McCracken, {H. J.} and C. Marinoni and A. Mazure and R. Merighi and S. Paltani and R. Pell{\'o} and L. Pozzetti and D. Vergani and G. Zamorani and E. Zucca",
year = "2010",
month = "12",
day = "7",
doi = "10.1051/0004-6361/201015540",
language = "English",
volume = "525",
journal = "Astronomy and Astrophysics",
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De La Torre, S, Meneux, B, De Lucia, G, Blaizot, J, Le Fèvre, O, Garilli, B, Cucciati, O, Mellier, Y, Pollo, A, Abbas, U, Bottini, D, Le Brun, V, MacCagni, D, Scodeggio, M, Tresse, L, Vettolani, G, Zanichelli, A, Adami, C, Arnouts, S, Bardelli, S, Bolzonella, M, Cappi, A, Charlot, S, Ciliegi, P, Contini, T, Foucaud, S, Franzetti, P, Gavignaud, I, Guzzo, L, Ilbert, O, Iovino, A, McCracken, HJ, Marinoni, C, Mazure, A, Merighi, R, Paltani, S, Pelló, R, Pozzetti, L, Vergani, D, Zamorani, G & Zucca, E 2010, 'Comparison of the VIMOS-VLT Deep Survey with the Munich semi-analytical model: I. Magnitude counts, redshift distribution, colour bimodality,and galaxy clustering', Astronomy and Astrophysics, vol. 525, n.º 7, A125. https://doi.org/10.1051/0004-6361/201015540

Comparison of the VIMOS-VLT Deep Survey with the Munich semi-analytical model : I. Magnitude counts, redshift distribution, colour bimodality,and galaxy clustering. / De La Torre, S.; Meneux, B.; De Lucia, G.; Blaizot, J.; Le Fèvre, O.; Garilli, B.; Cucciati, O.; Mellier, Y.; Pollo, A.; Abbas, U.; Bottini, D.; Le Brun, V.; MacCagni, D.; Scodeggio, M.; Tresse, L.; Vettolani, G.; Zanichelli, A.; Adami, C.; Arnouts, S.; Bardelli, S.; Bolzonella, M.; Cappi, A.; Charlot, S.; Ciliegi, P.; Contini, T.; Foucaud, S.; Franzetti, P.; Gavignaud, I.; Guzzo, L.; Ilbert, O.; Iovino, A.; McCracken, H. J.; Marinoni, C.; Mazure, A.; Merighi, R.; Paltani, S.; Pelló, R.; Pozzetti, L.; Vergani, D.; Zamorani, G.; Zucca, E.

En: Astronomy and Astrophysics, Vol. 525, N.º 7, A125, 07.12.2010.

Resultado de la investigación: Article

TY - JOUR

T1 - Comparison of the VIMOS-VLT Deep Survey with the Munich semi-analytical model

T2 - I. Magnitude counts, redshift distribution, colour bimodality,and galaxy clustering

AU - De La Torre, S.

AU - Meneux, B.

AU - De Lucia, G.

AU - Blaizot, J.

AU - Le Fèvre, O.

AU - Garilli, B.

AU - Cucciati, O.

AU - Mellier, Y.

AU - Pollo, A.

AU - Abbas, U.

AU - Bottini, D.

AU - Le Brun, V.

AU - MacCagni, D.

AU - Scodeggio, M.

AU - Tresse, L.

AU - Vettolani, G.

AU - Zanichelli, A.

AU - Adami, C.

AU - Arnouts, S.

AU - Bardelli, S.

AU - Bolzonella, M.

AU - Cappi, A.

AU - Charlot, S.

AU - Ciliegi, P.

AU - Contini, T.

AU - Foucaud, S.

AU - Franzetti, P.

AU - Gavignaud, I.

AU - Guzzo, L.

AU - Ilbert, O.

AU - Iovino, A.

AU - McCracken, H. J.

AU - Marinoni, C.

AU - Mazure, A.

AU - Merighi, R.

AU - Paltani, S.

AU - Pelló, R.

AU - Pozzetti, L.

AU - Vergani, D.

AU - Zamorani, G.

AU - Zucca, E.

PY - 2010/12/7

Y1 - 2010/12/7

N2 - Aims. This paper presents a detailed comparison between high-redshift observations from the VIMOS-VLT Deep Survey (VVDS) and predictions from the Munich semi-analytical model of galaxy formation. In particular, we focus this analysis on the magnitude, redshift, and colour distributions of galaxies, as well as their clustering properties. Methods. We constructed 100 quasi-independent mock catalogues, using the output of the semi-analytical model presented in De Lucia & Blaizot (2007, MNRAS, 375, 2). We then applied the same observational selection function of the VVDS-Deep survey, so as to carry out a fair comparison between models and observations. Results. We find that the semi-analytical model reproduces well the magnitude counts in the optical bands. It tends, however, to overpredict the abundance of faint red galaxies, in particular in the i' and z' bands. Model galaxies exhibit a colour bimodality that is only in qualitative agreement with the data. In particular, we find that the model tends to overpredict the number of red galaxies at low redshift and of blue galaxies at all redshifts probed by VVDS-Deep observations, although a large fraction of the bluest observed galaxies is absent from the model. In addition, the model overpredicts by about 14 per cent the number of galaxies observed at 0.2 < z < 1 with IAB < 24. When comparing the galaxy clustering properties, we find that model galaxies are more strongly clustered than observed ones at all redshift from z = 0.2 to z = 2, with the difference being less significant above z $\simeq$ 1. When splitting the samples into red and blue galaxies, we find that the observed clustering of blue galaxies is well reproduced by the model, while red model galaxies are much more clustered than observed ones, being principally responsible for the strong global clustering found in the model. Conclusions. Our results show that the discrepancies between Munich semi-analytical model predictions and VVDS-Deep observations, particularly in the galaxy colour distribution and clustering, can be explained to a large extend by an overabundance of satellite galaxies, mostly located in the red peak of the colour bimodality predicted by the model.

AB - Aims. This paper presents a detailed comparison between high-redshift observations from the VIMOS-VLT Deep Survey (VVDS) and predictions from the Munich semi-analytical model of galaxy formation. In particular, we focus this analysis on the magnitude, redshift, and colour distributions of galaxies, as well as their clustering properties. Methods. We constructed 100 quasi-independent mock catalogues, using the output of the semi-analytical model presented in De Lucia & Blaizot (2007, MNRAS, 375, 2). We then applied the same observational selection function of the VVDS-Deep survey, so as to carry out a fair comparison between models and observations. Results. We find that the semi-analytical model reproduces well the magnitude counts in the optical bands. It tends, however, to overpredict the abundance of faint red galaxies, in particular in the i' and z' bands. Model galaxies exhibit a colour bimodality that is only in qualitative agreement with the data. In particular, we find that the model tends to overpredict the number of red galaxies at low redshift and of blue galaxies at all redshifts probed by VVDS-Deep observations, although a large fraction of the bluest observed galaxies is absent from the model. In addition, the model overpredicts by about 14 per cent the number of galaxies observed at 0.2 < z < 1 with IAB < 24. When comparing the galaxy clustering properties, we find that model galaxies are more strongly clustered than observed ones at all redshift from z = 0.2 to z = 2, with the difference being less significant above z $\simeq$ 1. When splitting the samples into red and blue galaxies, we find that the observed clustering of blue galaxies is well reproduced by the model, while red model galaxies are much more clustered than observed ones, being principally responsible for the strong global clustering found in the model. Conclusions. Our results show that the discrepancies between Munich semi-analytical model predictions and VVDS-Deep observations, particularly in the galaxy colour distribution and clustering, can be explained to a large extend by an overabundance of satellite galaxies, mostly located in the red peak of the colour bimodality predicted by the model.

KW - Cosmology: observations

KW - Galaxies: evolution

KW - Galaxies: high-redshift

KW - Galaxies: statistics

KW - Large-scale structure of Universe

UR - http://www.scopus.com/inward/record.url?scp=85025139052&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201015540

DO - 10.1051/0004-6361/201015540

M3 - Article

AN - SCOPUS:85025139052

VL - 525

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

SN - 0004-6361

IS - 7

M1 - A125

ER -