2002A&A...395...17W


Query : 2002A&A...395...17W

2002A&A...395...17W - Astronomy and Astrophysics, volume 395, 17-23 (2002/11-3)

HE 0435-1223: A wide separation quadruple QSO and gravitational lens.

WISOTZKI L., SCHECHTER P.L., BRADT H.V., HEINMUELLER J. and REIMERS D.

Abstract (from CDS):

We report the discovery of a new gravitationally lensed QSO, at a redshift z=1.689, with four QSO components in a cross-shaped arrangement around a bright galaxy. The maximum separation between images is 2.6", enabling a reliable decomposition of the system. Three of the QSO components have g≃19.6, while component A is about 0.6 mag brighter. The four components have nearly identical colours, suggesting little if any dust extinction in the foreground galaxy. The lensing galaxy is prominent in the i band, weaker in r and not detected in g. Its spatial profile is that of an elliptical galaxy with a scale length of ∼12kpc. Combining the measured colours and a mass model for the lens, we estimate a most likely redshift range of 0.3<z<0.4. Predicted time delays between the components are ≲10days. The QSO shows evidence for variability, with total g band magnitudes of 17.89 and 17.71 for two epochs separated by ∼2 months. However, the relative fluxes of the components did not change, indicating that the variations are intrinsic to the QSO rather than induced by microlensing.

Abstract Copyright:

Journal keyword(s): quasars: individual: HE 0435-1223 - quasars: general - gravitational lensing

Nomenclature: Fig.2, Table 1: [WSB2002] 0435-1223 A (Nos A-D, G).

Simbad objects: 10

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Number of rows : 10
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 [WSB2002] 0435-1223 C LeQ 04 38 14.73 -12 17 15.0     19.149   19.631 ~ 37 0
2 [WSB2002] 0435-1223 B LeQ 04 38 14.80 -12 17 13.8     19.082   19.623 ~ 41 0
3 [WSB2002] 0435-1223 D LeQ 04 38 14.84 -12 17 16.0     19.196   19.824 ~ 40 0
4 [VV2006] J043814.8-122314 QSO 04 38 14.88 -12 17 14.6     17.15     ~ 215 2
5 [WSB2002] 0435-1223 G G 04 38 14.88 -12 17 14.6     20.80   19.83 ~ 24 0
6 [WSB2002] 0435-1223 A LeQ 04 38 14.90 -12 17 14.4     18.545   19.106 ~ 38 0
7 V* UY Sex HS* 10 50 02.8265487864 -00 00 36.879009588 12.063 13.184 13.474 13.606 13.769 sdO9VIIHe6 162 0
8 QSO J2240+0321 QSO 22 40 30.234 +03 21 30.63           ~ 671 1
9 Z 378-15 G 22 40 30.23447 +03 21 30.6290           ~ 630 0

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2023.10.04-21:48:47

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