2007A&A...474..777C


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.04CEST01:54:31

2007A&A...474..777C - Astronomy and Astrophysics, volume 474, 777-782 (2007/11-2)

Q0045-3337: models including strong lensing by a spiral galaxy.

CHIEREGATO M., MIRANDA M. and JETZER P.

Abstract (from CDS):

Falomo et al. (2005A&A...434..469F) discovered a disk-like galaxy at ∼1.2arcsec from the QSO Q0045-3337 by means of ESO VLT adaptive optics. They estimated a galaxy Einstein radius (for a point mass) of comparable size, thus suggesting the existence of a new, rare, spiral lens candidate, despite no evident image splitting. We discuss the possible lensing effect of the galaxy in more detail. We performed two-dimensional surface photometry on the VLT image of the galaxy, confirming its spiral nature. We then verified if simple mass models, partially constrained by observational data, require unrealistic parameters to produce a still hidden second quasar image. We also evaluated the viability of an instrumental or a lensing origin of the observed QSO deformation. After galaxy model subtraction, we found a residual image, which we consider unlikely to be related to gravitational lensing. Existing data are not sufficient to assess the presence of image splitting, nor to constrain the number of images or discriminate between galaxy mass models. Further observations are mandatory to progress in the study of this remarkable system, which could shed more light on the lensing behavior of spiral galaxies.

Abstract Copyright:

Journal keyword(s): gravitational lensing - galaxies: spiral - quasars: individual: Q0045-3337

Nomenclature: Figs 1, 3: [CMJ2007] A (Nos A-D).

Simbad objects: 8

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Number of rows : 8

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 QSO B0045-3337 * 00 47 41.90 -33 20 55.0     17.80     ~ 5 1
2 QSO B0218+357 QSO 02 21 05.5 +35 56 14   20.0 20.0 19.60   ~ 497 3
3 QSO B1600+4344 QSO 16 01 40.4818 +43 16 47.394   22.12 21.92     ~ 176 1
4 QSO B1830-211 QSO 18 33 39.92 -21 03 39.9     18.70 21   ~ 549 6
5 PMN J2004-1349 QSO 20 04 07.09 -13 49 31.1           ~ 22 1
6 QSO J2240+0321 QSO 22 40 30.234 +03 21 30.63           ~ 637 0
7 Z 378-15 G 22 40 30.23447 +03 21 30.6290           ~ 629 0
8 [FKS2005] 0045-3337 G1 G ~ ~     16.97     ~ 2 0

    Equat.    Gal    SGal    Ecl

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2020.07.04-01:54:31

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