QSO J1721+8842 spectra : J/A+A/657/A113

Access to
vizier
VizieR
vizier
VizieR FTP ReadMe
TAP
TAP
Xmatch
Fits
Download notebook

Authors : Lemon C. orcid , Millon M., Sluse D. (hide) , Millon M., Sluse D. et..al

VizieR DOI : 10.26093/cds/vizier.36570113
Bibcode : 2022A&A...657A.113L (ADS) (Simbad) (Objects)
...(more)
(hide)

CDS Keywords : Gravitational lensing; QSOs; Galaxies, spectra
UAT : Gravitational lensing, Quasars, Galaxies, Spectroscopy

Observation (OC)

Records :

Inserted into VizieR : 20-Jan-2022
Last modification : 18-May-2022

J1721+8842 a gravitationally lensed binary quasar with a proximate damped Lyman-alpha absorber. (2022)

Keywords : gravitational lensing strong - galaxy: general - quasars: individual: J1721+8842

Abstract:High-redshift binary quasars provide key insights into mergers and quasar activity, and are useful tools for probing the spatial kinematics and chemistry of galaxies along the line-of-sight. However, only three sub-10-kpc binaries have been confirmed above z=1. Gravitational lensing would provide a way to easily resolve such binaries, study them in higher resolution, and provide more sightlines, though the required alignment with a massive foreground galaxy is rare. Through image deconvolution of StanCam Nordic Optical Telescope (NOT) monitoring data, we reveal two further point sources in the known, z~2.38, quadruply lensed quasar (quad), J1721+8842. An ALFOSC/NOT long-slit spectrum shows that the brighter of these two ...(more)
Abstract: (hide)
Astronomy and Astrophysics policies
Reduced two-dimensional spectra taken in long-slit spectroscopy mode for J1721+8842, bias- and sky-subtracted, and masked of cosmic rays. Two spectra are included taken at the same position angle as described in the text of the paper.
Cameron Lemon, cameron.lemon(at)epfl.ch

                


                

                    

                


                

                    

                


                

                    
Catalogue provenance