2010A&A...516L..12C


Query : 2010A&A...516L..12C

2010A&A...516L..12C - Astronomy and Astrophysics, volume 516, L12-12 (2010/6-2)

First case of strong gravitational lensing by a QSO: SDSS J0013+1523 at z = 0.120.

COURBIN F., TEWES M., DJORGOVSKI S.G., SLUSE D., MAHABAL A., RERAT F. and MEYLAN G.

Abstract (from CDS):

We present the first case of strong gravitational lensing by a QSO: SDSS J0013+1523 at z=0.120. The discovery is the result of a systematic search for emission lines redshifted behind QSOs, among 22 298 spectra of the SDSS data release 7. Apart from the z=0.120 spectral features of the foreground QSO, the spectrum of SDSS J0013+1523 also displays the [OII] and Hβ emission lines and the [OIII] doublet, all at the same redshift, z=0.640. Using sharp Keck adaptive optics K-band images obtained using laser guide stars, we unveil two objects within a radius of 2" from the QSO. Deep Keck optical spectroscopy clearly confirms one of these objects at z=0.640 and shows traces of the [OIII] emission line of the second object, also at z=0.640. Lens modeling suggests that they represent two images of the same z=0.640 emission-line galaxy. Our Keck spectra also allow us to measure the redshift of an intervening galaxy at z=0.394, located 3.2" away from the line of sight to the QSO. If the z=0.120 QSO host galaxy is modeled as a singular isothermal sphere, its mass within the Einstein radius is ME(r<1h–1kpc)=2.16x1010h–1M and its velocity dispersion is σSIS=169km/s. This is about 1-σ away from the velocity dispersion estimated from the width of the QSO Hβ emission line, σ*(MBH)=124±47km/s. Deep optical HST imaging will be necessary to constrain the total radial mass profile of the QSO host galaxy using the detailed shape of the lensed source. This first case of a QSO acting as a strong lens on a more distant object opens new directions in the study of QSO host galaxies.

Abstract Copyright:

Journal keyword(s): gravitational lensing: strong - quasars: individual: SDSS J0013+1523 - dark matter

Nomenclature: Figs 2-3, Table 1: [CTD2010] SDSS J0013+1523 A (Nos A-B), [CTD2010] SDSS J0013+1523 GN (Nos G1-G2).

Simbad objects: 6

goto Full paper

goto View the references in ADS

Number of rows : 6
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 [CTD2010] SDSS J0013+1523 G1 G 00 13 39.682 +15 23 14.93           ~ 1 0
2 [CTD2010] SDSS J0013+1523 G2 G 00 13 40.034 +15 23 13.67           ~ 1 0
3 2MASS J00134022+1523120 Sy1 00 13 40.2102030456 +15 23 12.059050668   19.42 18.88     ~ 13 0
4 [CTD2010] SDSS J0013+1523 A LeG 00 13 40.2102030456 +15 23 12.059050668           ~ 1 0
5 [CTD2010] SDSS J0013+1523 B LeG 00 13 40.2102030456 +15 23 12.059050668           ~ 1 0
6 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 2683 0

To bookmark this query, right click on this link: simbad:objects in 2010A&A...516L..12C and select 'bookmark this link' or equivalent in the popup menu


2023.02.07-15:53:03

© Université de Strasbourg/CNRS

    • Contact