Bibcode
Hurtado-Gil, Ll.; Arnalte-Mur, P.; Martínez, V. J.; Fernández-Soto, A.; Stefanon, M.; Ascaso, B.; López-Sanjuán, C.; Márquez, I.; Pović, M.; Viironen, K.; Aguerri, J. A. L.; Alfaro, E.; Aparicio-Villegas, T.; Benítez, N.; Broadhurst, T.; Cabrera-Caño, J.; Castander, F. J.; Cepa, J.; Cerviño, M.; Cristóbal-Hornillos, D.; González Delgado, R. M.; Husillos, C.; Infante, L.; Masegosa, J.; Moles, M.; Molino, A.; del Olmo, A.; Paredes, S.; Perea, J.; Prada, F.; Quintana, J. M.
Bibliographical reference
The Astrophysical Journal, Volume 818, Issue 2, article id. 174, 13 pp. (2016).
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2
2016
Journal
Citations
8
Refereed citations
8
Description
We study the clustering of galaxies as a function of spectral type and
redshift in the range 0.35 < z < 1.1 using data from the Advanced
Large Homogeneous Area Medium Band Redshift Astronomical (ALHAMBRA)
survey. The data cover 2.381 deg2 in 7 fields, after applying
a detailed angular selection mask, with accurate photometric redshifts
{{[}}{σ }z\lt 0.014(1+z){{]}} down to IAB
< 24. From this catalog we draw five fixed number density
redshift-limited bins. We estimate the clustering evolution for two
different spectral populations selected using the ALHAMBRA-based
photometric templates: quiescent and star-forming galaxies. For each
sample we measure the real-space clustering using the projected
correlation function. Our calculations are performed over the range
[0.03, 10.0] h‑1 Mpc, allowing us to find a steeper
trend for {r}p≲ 0.2 {h}-1 Mpc, which is
especially clear for star-forming galaxies. Our analysis also shows a
clear early differentiation in the clustering properties of both
populations: star-forming galaxies show weaker clustering with evolution
in the correlation length over the analyzed redshift range, while
quiescent galaxies show stronger clustering already at high redshifts
and no appreciable evolution. We also perform the bias calculation where
similar segregation is found, but now it is among the quiescent galaxies
where a growing evolution with redshift is clearer (abrigatted). These
findings clearly corroborate the well-known color–density
relation, confirming that quiescent galaxies are mainly located in dark
matter halos that are more massive than those typically populated by
star-forming galaxies.