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Publication . Article . Preprint . 2021 . Embargo end date: 01 Jan 2020

Gaia GraL: Gaia DR2 Gravitational Lens Systems. VI. Spectroscopic Confirmation and Modeling of Quadruply-Imaged Lensed Quasars

Daniel Stern; S. G. Djorgovski; Alberto Krone-Martins; Dominique Sluse; Ludovic Delchambre; C. Ducourant; Ramachrisna Teixeira; +19 Authors
Open Access
Combining the exquisite angular resolution of Gaia with optical light curves and WISE photometry, the Gaia Gravitational Lenses group (GraL) uses machine learning techniques to identify candidate strongly lensed quasars, and has confirmed over two dozen new strongly lensed quasars from the Gaia Data Release 2. This paper reports on the 12 quadruply-imaged quasars identified by this effort to date, which is approximately a 20% increase in the total number of confirmed quadruply-imaged quasars. We discuss the candidate selection, spectroscopic follow-up, and lens modeling. We also report our spectroscopic failures as an aid for future investigations.
Comment: 18 pages, 8 figures; submitted to ApJ
Subjects by Vocabulary

arXiv: Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics::Galaxy Astrophysics Astrophysics::Instrumentation and Methods for Astrophysics

Microsoft Academic Graph classification: Lens (optics) law.invention law Light curve Quasar Angular resolution Gravitation Photometry (optics) Data release Physics Astronomy Gravitational lens


Astrophysics of Galaxies (astro-ph.GA), FOS: Physical sciences, Astrophysics, Astrophysics of Galaxies, Gravitational lensing, Physical, chemical, mathematical & earth Sciences, Space science, astronomy & astrophysics, Physique, chimie, mathématiques & sciences de la terre, Aérospatiale, astronomie & astrophysique, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], Space and Planetary Science, Astronomy and Astrophysics, Astrophysics - Astrophysics of Galaxies

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Funded byView all
Cosmology with Strong Gravitational Lensing
  • Funder: European Commission (EC)
  • Project Code: 787886
  • Funding stream: H2020 | ERC | ERC-ADG
FCT| SFRH/BPD/74697/2010
  • Funder: Fundação para a Ciência e a Tecnologia, I.P. (FCT)
  • Project Code: SFRH/BPD/74697/2010
  • Funding stream: OE
NSF| Predictive monitoring of aperiodic sources
  • Funder: National Science Foundation (NSF)
  • Project Code: 1815034
  • Funding stream: Directorate for Mathematical & Physical Sciences | Division of Astronomical Sciences
FCT| PTDC/FIS-AST/31546/2017
Correcting Reddening Intelligently for cosmological Supernova Probes
  • Funder: Fundação para a Ciência e a Tecnologia, I.P. (FCT)
  • Project Code: PTDC/FIS-AST/31546/2017
  • Funding stream: 3599-PPCDT
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NEANIAS Space Research Community