1998A&A...339L..13L


Query : 1998A&A...339L..13L

1998A&A...339L..13L - Astronomy and Astrophysics, volume 339, L13-16 (1998/11-1)

Detection of the lensing galaxy in HE 2149-2745.

LOPEZ S., WUCKNITZ O. and WISOTZKI L.

Abstract (from CDS):

We have obtained new BVR-band images of the gravitationally lensed QSO pair HE 2149-2745 A,B (QSO redshift ze=2.033; angular separation θAB=1.71"), under 1" seeing conditions. Subtraction of a scaled point-spread-function reveals an extended object of angular size comparable to θAB, and R magnitude of 20.4 lying between and equidistant to the QSOs. The geometry of the system leads us to interpret this object as the lensing agent responsible for the double QSO images. A fit to the galaxy surface brightness profile indicates an elliptical galaxy, which is further supported by the absence of MgII in absorption. The lensing galaxy is not detected in B and V. We discuss possible lens models for this geometry constrained by our observations and consequences for the mass and redshift of the lens.

Abstract Copyright:

Journal keyword(s): quasars: individual: HE 2149-2745 - quasars: general - gravitational lensing

Nomenclature: [WKL96] HE 2149-2745 G N=1.

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 QSO B2149-2745 QSO 21 52 07.4534 -27 31 49.718   18.70 18.39     ~ 99 2
2 [WKL96] HE 2149-2745 G G 21 52 07.48 -27 31 49.3           ~ 23 1
3 QSO B2149-2745A LeQ 21 52 07.53 -21 31 49.9   17.13 16.82     ~ 13 1
4 QSO B2149-2745B LeQ 21 55 -27.4   18.70 18.39     ~ 11 1

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2022.05.19-19:45:01

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