Stellar mass function of cluster galaxies at z ~ 1.5: evidence for reduced quenching efficiency at high redshift
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Archivos
Fecha
2016-08
Profesor/a Guía
Facultad/escuela
Idioma
en
Título de la revista
ISSN de la revista
Título del volumen
Editor
EDP SCIENCES
Nombre de Curso
Licencia CC
Licencia CC
Resumen
We present the stellar mass functions (SMFs) of passive and star-forming galaxies with a limiting mass of 10(10.1) M-circle dot in four spectroscopically confirmed Spitzer Adaptation of the Red-sequence Cluster Survey (SpARCS) galaxy clusters at 1 : 37 < z < 1 : 63. The clusters have 113 spectroscopically confirmed members combined, with 8-45 confirmed members each. We construct Ks-bandselected photometric catalogs for each cluster with an average of 11 photometric bands ranging from u to 8 mu m. We compare our cluster galaxies to a field sample derived from a similar Ks-band-selected catalog in the UltraVISTA / COSMOS field. The SMFs resemble those of the field, but with signs of environmental quenching. We find that 30 +/- 20% of galaxies that would normally be forming stars in the field are quenched in the clusters. The environmental quenching e ffi ciency shows little dependence on projected cluster-centric distance out to similar to 4 Mpc, providing tentative evidence of pre-processing and/or galactic conformity in this redshift range. We also compile the available data on environmental quenching efficiencies from the literature, and find that the quenching e ffi ciency in clusters and in groups appears to decline with increasing redshift in a manner consistent with previous results and expectations based on halo mass growth.
Notas
Indexación: Web of Science
Palabras clave
STAR-FORMING GALAXIES, NEAR-INFRARED SPECTROSCOPY, DIGITAL SKY SURVEY, RED-SEQUENCE, X-RAY, PHOTOMETRIC REDSHIFTS, GALACTIC CONFORMITY, MOLECULAR GAS, RADIO GALAXY, MU-M
Citación
A&A 592, A161 (2016)