2005A&A...436L..21C

Query : 2005A&A...436L..21C

2005A&A...436L..21C - Astronomy and Astrophysics, volume 436L21-25 (2005/6-3)

Discovery of a high-redshift Einstein ring.

CABANAC R.A., VALLS-GABAUD D., JAUNSEN A.O., LIDMAN C. and JERJEN H.

Abstract (from CDS):

We report the discovery of a partial Einstein ring of radius 1.48" produced by a massive (and seemingly isolated) elliptical galaxy. The spectroscopic follow-up at the VLT reveals a 2L* galaxy at z=0.986, which is lensing a post-starburst galaxy at z=3.773. This unique configuration yields a very precise measure of the mass of the lens within the Einstein radius, (8.3 ±0.4)x1011h70–1M☉. The fundamental plane relation indicates an evolution rate of dlog(M/L)B/dz=-0.57±0.04, similar to other massive ellipticals at this redshift. The source galaxy shows strong interstellar absorption lines indicative of large gas-phase metallicities, with fading stellar populations after a burst. Higher resolution spectra and imaging will allow the detailed study of an unbiased representative of the galaxy population when the universe was just 12% of its current age.

Abstract Copyright: ∼

Journal keyword(s): cosmology: observations - gravitational lensing - galaxies: high-redshift - ellipticals - evolution - objnS{FOR J0332-3557}

Nomenclature: Text: [CVJ2005] For J0332-3557 Lens N=1, [CVJ2005] For J0332-3557 Lensed source N=1, [CVJ2005] For J0332-3557 Einstein Ring N=1.

Simbad objects: 19

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Number of rows : 19
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 CFRS 03.1077 G 03 02 32.59 +00 06 00.0           ~ 26 1
2 [CSH2002] Lensed G G 03 02 33.0 +00 06 00           ~ 7 1
3 CXOCDFS J033206.4-274728 EmG 03 32 06.446 -27 47 28.96   23.7799   22.728 21.488 ~ 47 0
4 [CVJ2005] For J0332-3557 Lensed source G 03 32 59.0 -35 57 51           ~ 11 1
5 [CVJ2005] For J0332-3557 Lens G 03 32 59.0 -35 57 51           ~ 5 1
6 [CVJ2005] For J0332-3557 Einstein Ring LeI 03 32 59.94 -35 57 51.7           ~ 4 0
7 ACO S 373 ClG 03 38 29.4 -35 27 08           ~ 2029 0
8 [HTL92] G G 04 14 37.70 +05 34 43.0     24.4     ~ 37 1
9 4C 05.19 QSO 04 14 37.76734974 +05 34 42.3295956   24.100 23.800 21.270   ~ 371 2
10 NGC 1741 EmG 05 01 38.3 -04 15 25   13.7   13.02 13.6 ~ 273 0
11 NAME Lynx Arc LeI 08 48 48.76 +44 55 48.6           ~ 50 0
12 QSO J1004+1229 QSO 10 04 24.8871 +12 29 22.245   24.83 23.23 20.80   ~ 53 1
13 [LGB2002] J1004+1229 G G 10 04 24.9 +12 29 22           ~ 3 1
14 4C 05.51 rG 11 31 56.493 +04 55 48.85           ~ 123 1
15 [VV2006] J114756.0-025023 QSO 11 47 56.0013503352 -02 50 23.398559520   21.43 20.55     ~ 29 0
16 NAME MS 1512-cB58 AGN 15 14 22.2751 +36 36 25.674     20.64   20.35 ~ 326 0
17 FIRST J151422.4+363620 rG 15 14 22.482 +36 36 21.08           ~ 146 1
18 QSO B2016+112 QSO 20 19 18.2 +11 27 14     22.5     ~ 195 1
19 [LSS84] 2016+112 E G ~ ~         24.6 ~ 8 0

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