Bright lenses are easy to find: Spectroscopic confirmation of lensed quasars in the Southern Sky

C. Spiniello, A. Agnello, A. V. Sergeyev, T. Anguita, Rodríguez, N. R. Napolitano, C. Tortora

Resultado de la investigación: Article

3 Citas (Scopus)

Resumen

Gravitationally lensed quasars are valuable, but extremely rare, probes of observational cosmology and extragalactic astrophysics. Progress in these fields has been limited just by the paucity of systems with good ancillary data. Here we present a first spectroscopic confirmation of lenses discovered in the Southern Sky from the DES and KiDS-DR3 footprints. We have targeted seven high-graded candidates, selected with new techniques, with NTT-EFOSC2, and confirmed five of them. We provide source spectroscopic redshifts, image separations, gri photometry, and first lens model parameters. The success rate of ∼70 per cent confirms our forecasts, based on the comparison between the number of candidate doubles and quadruplets in our searches over a ≈5000 deg2 footprint and theoretical predictions.

Idioma originalEnglish
Páginas (desde-hasta)3888-3893
Número de páginas6
PublicaciónMonthly Notices of the Royal Astronomical Society
Volumen483
N.º3
DOI
EstadoPublished - 1 ene 2019

Huella dactilar

Southern sky
footprints
footprint
quasars
lenses
astrophysics
cosmology
forecasting
photometry
probe
probes
prediction
predictions
forecast
comparison
rate
parameter

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Citar esto

Spiniello, C. ; Agnello, A. ; Sergeyev, A. V. ; Anguita, T. ; Rodríguez ; Napolitano, N. R. ; Tortora, C. / Bright lenses are easy to find : Spectroscopic confirmation of lensed quasars in the Southern Sky. En: Monthly Notices of the Royal Astronomical Society. 2019 ; Vol. 483, N.º 3. pp. 3888-3893.
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abstract = "Gravitationally lensed quasars are valuable, but extremely rare, probes of observational cosmology and extragalactic astrophysics. Progress in these fields has been limited just by the paucity of systems with good ancillary data. Here we present a first spectroscopic confirmation of lenses discovered in the Southern Sky from the DES and KiDS-DR3 footprints. We have targeted seven high-graded candidates, selected with new techniques, with NTT-EFOSC2, and confirmed five of them. We provide source spectroscopic redshifts, image separations, gri photometry, and first lens model parameters. The success rate of ∼70 per cent confirms our forecasts, based on the comparison between the number of candidate doubles and quadruplets in our searches over a ≈5000 deg2 footprint and theoretical predictions.",
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Bright lenses are easy to find : Spectroscopic confirmation of lensed quasars in the Southern Sky. / Spiniello, C.; Agnello, A.; Sergeyev, A. V.; Anguita, T.; Rodríguez; Napolitano, N. R.; Tortora, C.

En: Monthly Notices of the Royal Astronomical Society, Vol. 483, N.º 3, 01.01.2019, p. 3888-3893.

Resultado de la investigación: Article

TY - JOUR

T1 - Bright lenses are easy to find

T2 - Spectroscopic confirmation of lensed quasars in the Southern Sky

AU - Spiniello, C.

AU - Agnello, A.

AU - Sergeyev, A. V.

AU - Anguita, T.

AU - Rodríguez,

AU - Napolitano, N. R.

AU - Tortora, C.

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AB - Gravitationally lensed quasars are valuable, but extremely rare, probes of observational cosmology and extragalactic astrophysics. Progress in these fields has been limited just by the paucity of systems with good ancillary data. Here we present a first spectroscopic confirmation of lenses discovered in the Southern Sky from the DES and KiDS-DR3 footprints. We have targeted seven high-graded candidates, selected with new techniques, with NTT-EFOSC2, and confirmed five of them. We provide source spectroscopic redshifts, image separations, gri photometry, and first lens model parameters. The success rate of ∼70 per cent confirms our forecasts, based on the comparison between the number of candidate doubles and quadruplets in our searches over a ≈5000 deg2 footprint and theoretical predictions.

KW - Galaxies: formation

KW - Gravitational lensing: strong

KW - Surveys

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