SIMBAD references

2005ApJ...623..721P - Astrophys. J., 623, 721-741 (2005/April-3)

The morphology-density relation in z ∼ 1 clusters.

POSTMAN M., FRANX M., CROSS N.J.G., HOLDEN B., FORD H.C., ILLINGWORTH G.D., GOTO T., DEMARCO R., ROSATI P., BLAKESLEE J.P., TRAN K.-V., BENITEZ N., CLAMPIN M., HARTIG G.F., HOMEIER N., ARDILA D.R., BARTKO F., BOUWENS R.J., BRADLEY L.D., BROADHURST T.J., BROWN R.A., BURROWS C.J., CHENG E.S., FELDMAN P.D., GOLIMOWSKI D.A., GRONWALL C., INFANTE L., KIMBLE R.A., KRIST J.E., LESSER M.P., MARTEL A.R., MEI S., MENANTEAU F., MEURER G.R., MILEY G.K., MOTTA V., SIRIANNI M., SPARKS W.B., TRAN H.D., TSVETANOV Z.I., WHITE R.L. and ZHENG W.

Abstract (from CDS):

We measure the morphology-density relation (MDR) and morphology-radius relation (MRR) for galaxies in seven z∼1 clusters that have been observed with the Advanced Camera for Surveys (ACS) on board the Hubble Space Telescope. Simulations and independent comparisons of our visually derived morphologies indicate that ACS allows one to distinguish between E, S0, and spiral morphologies down to z850=24, corresponding to L/L*=0.21 and 0.30 at z=0.83 and 1.24, respectively. We adopt density and radius estimation methods that match those used at lower redshift in order to study the evolution of the MDR and MRR. We detect a change in the MDR between 0.8<z<1.2 and that observed at z∼0, consistent with recent work; specifically, the growth in the bulge-dominated galaxy fraction, fE+S0, with increasing density proceeds less rapidly at z∼1 than it does at z∼0. At z∼1 and Σ≥500 galaxies/Mpc2, we find <fE+S0≥0.72±0.10. At z∼0, an E+S0 population fraction of this magnitude occurs at densities about 5 times smaller. The evolution in the MDR is confined to densities Σ≳40 galaxies/Mpc2 and appears to be primarily due to a deficit of S0 galaxies and an excess of Sp+Irr galaxies relative to the local galaxy population. The fE-density relation exhibits no significant evolution between z=1 and 0. We find mild evidence to suggest that the MDR is dependent on the bolometric X-ray luminosity of the intracluster medium. Implications for the evolution of the disk galaxy population in dense regions are discussed in the context of these observations.

Abstract Copyright:

Journal keyword(s): Galaxies: Clusters: General - Galaxies: Evolution - Galaxies: Formation - Galaxies: Structure

CDS comments: Parag. 5.1 : CL 0016+1654 = ClG 0016+16, fig. 14 : 1604+4321 is J1604+4321

Simbad objects: 14

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2005ApJ...623..721P and select 'bookmark this link' or equivalent in the popup menu


2020.09.30-02:33:41

© Université de Strasbourg/CNRS

    • Contact