2005A&A...442..125D

Query : 2005A&A...442..125D

2005A&A...442..125D - Astronomy and Astrophysics, volume 442, 125-136 (2005/10-4)

The evolution of early-type galaxies at z∼1 from the K20 survey.

DI SEREGO ALIGHIERI S., VERNET J., CIMATTI A., LANZONI B., CASSATA P., CIOTTI L., DADDI E., MIGNOLI M., PIGNATELLI E., POZZETTI L., RENZINI A., RETTURA A. and ZAMORANI G.

Abstract (from CDS):

We have performed VLT spectroscopy of an almost complete sample of 18 early-type galaxies with 0.88≤z≤1.3 plus two at z=0.67, selected from the K20 survey, and derived the velocity dispersion for 15+2 of them. By combining these data with HST and VLT images, we study the Fundamental Plane (FP), the Faber-Jackson and the Kormendy relations at z∼1. Compared with the local one, the FP at z∼1 has a remarkably small scatter, and shows both an offset and a rotation, which we interpret in terms of evolution of the mass-to-light ratio, and possibly of the size. We give evidence that the evolution rate depends on galaxy mass, being faster for less massive galaxies. We discuss the possible factors driving the evolution of spheroids and compare our results with the predictions of the hierachical models of galaxy formation.

Abstract Copyright: ∼

Journal keyword(s): galaxies: evolution - galaxies: elliptical and lenticular, cD - galaxies: kinematics and dynamics.

Simbad objects: 21

Full paper

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Number of rows : 21

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2023	#notes
1	K20S 0055-269 28	G	00 57 50.333	-26 41 09.29				24.19		~	3	0
2	K20S 0055-269 68	G	00 57 54.282	-26 41 43.95				23.53		~	3	0
3	K20S 0055-269 295	G	00 57 56.443	-26 44 20.92				23.75		~	3	0
4	K20S 0055-269 123	G	00 57 59.047	-26 42 29.32				22.96		~	3	0
5	K20S 0055-269 318	G	00 58 01.237	-26 44 38.15				23.87		~	3	0
6	K20S 0055-269 169	G	00 58 02.730	-26 43 00.83				22.70		~	3	0
7	K20S 0055-269 331	G	00 58 06.197	-26 44 46.64				22.95		~	3	0
8	K20S 0055-269 338	G	00 58 06.799	-26 44 51.40				23.12		~	3	0
9	K20S 0055-269 247	G	00 58 07.079	-26 43 47.06				24.43		~	3	0
10	K20S 0055-269 114	G	00 58 08.267	-26 42 24.21				23.48		~	3	0
11	EIS-DEEP CDFS-1 J 1 551	G	03 32 11.212	-27 45 33.51		26.00	24.62	23.92	23.2408	~	17	0
12	EIS-DEEP CDFS-1 J 1 639	G	03 32 26.2654	-27 45 50.728		26.5376		24.35	23.7766	~	20	0
13	ACS-GC 90046163	AGN	03 32 26.2927	-27 45 36.186		25.3760		23.97	23.2588	~	35	0
14	EIS-DEEP CDFS-2 J 1 329	AGN	03 32 32.0408	-27 44 51.735		25.2464		22.90	21.998	~	34	0
15	CXOCDFS J033232.7-274547	EmG	03 32 32.7124	-27 45 47.462		20.5481	22.657	22.2277	21.249	~	34	0
16	[SWM2014] GOODS-S 23421	AGN	03 32 33.065	-27 48 07.53		27.2325		24.89	23.861	~	31	0
17	EIS-DEEP CDFS-2 Ks 1 334	G	03 32 33.818	-27 44 10.02		24.3566	23.3651	22.272	21.5276	~	27	0
18	EIS-DEEP CDFS-2 Ks 1 419	EmG	03 32 35.453	-27 44 21.10		25.8289		23.30	22.9424	~	21	0
19	EIS-DEEP CDFS-2 J 1 384	G	03 32 36.660	-27 45 02.02		27.359	25.705	24.86		~	13	0
20	EIS-DEEP CDFS-2 J 1 682	G	03 32 37.193	-27 46 08.08	26.2737	25.1755	23.390	22.43	21.436	~	50	0
21	ACO 1656	ClG	12 59 44.40	+27 54 44.9						~	4698	2

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