Finding Multiply Lensed and Binary Quasars in the DESI Legacy Imaging Surveys

The time delay between multiple images of strongly lensed quasars is a powerful tool for measuring the Hubble constant ( H _0 ). To achieve H _0 measurements with higher precision and accuracy using the time delay, it is crucial to expand the sample of lensed quasars. We conduct a search for strongl...
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Gespeichert in:

Autor*in:	C. Dawes [verfasserIn] C. Storfer [verfasserIn] X. Huang [verfasserIn] G. Aldering [verfasserIn] Aleksandar Cikota [verfasserIn] Arjun Dey [verfasserIn] D. J. Schlegel [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2023

Schlagwörter:	Quasars Double quasars Gravitational lensing Strong gravitational lensing Hubble constant Galaxy evolution

Übergeordnetes Werk:	In: The Astrophysical Journal Supplement Series - IOP Publishing, 2022, 269(2023), 2, p 61
Übergeordnetes Werk:	volume:269 ; year:2023 ; number:2, p 61

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.3847/1538-4365/ad015a

Katalog-ID:	DOAJ100026648

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source	In The Astrophysical Journal Supplement Series 269(2023), 2, p 61 volume:269 year:2023 number:2, p 61
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topic_facet	Quasars Double quasars Gravitational lensing Strong gravitational lensing Hubble constant Galaxy evolution Astrophysics
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authorswithroles_txt_mv	C. Dawes @@aut@@ C. Storfer @@aut@@ X. Huang @@aut@@ G. Aldering @@aut@@ Aleksandar Cikota @@aut@@ Arjun Dey @@aut@@ D. J. Schlegel @@aut@@
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callnumber-first	Q - Science
author	C. Dawes
spellingShingle	C. Dawes misc QB460-466 misc Quasars misc Double quasars misc Gravitational lensing misc Strong gravitational lensing misc Hubble constant misc Galaxy evolution misc Astrophysics Finding Multiply Lensed and Binary Quasars in the DESI Legacy Imaging Surveys
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topic_title	QB460-466 Finding Multiply Lensed and Binary Quasars in the DESI Legacy Imaging Surveys Quasars Double quasars Gravitational lensing Strong gravitational lensing Hubble constant Galaxy evolution
topic	misc QB460-466 misc Quasars misc Double quasars misc Gravitational lensing misc Strong gravitational lensing misc Hubble constant misc Galaxy evolution misc Astrophysics
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title	Finding Multiply Lensed and Binary Quasars in the DESI Legacy Imaging Surveys
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title_sort	finding multiply lensed and binary quasars in the desi legacy imaging surveys
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title_auth	Finding Multiply Lensed and Binary Quasars in the DESI Legacy Imaging Surveys
abstract	The time delay between multiple images of strongly lensed quasars is a powerful tool for measuring the Hubble constant ( H _0 ). To achieve H _0 measurements with higher precision and accuracy using the time delay, it is crucial to expand the sample of lensed quasars. We conduct a search for strongly lensed quasars in the Dark Energy Spectroscopic Instrument (DESI) Legacy Imaging Surveys. The DESI Legacy Surveys comprise 19,000 deg ^2 of the extragalactic sky observed in three optical bands ( g , r , and z ), making it well suited for the discovery of new strongly lensed quasars. We apply an autocorrelation algorithm to ∼5 million objects classified as quasars in the DESI Quasar Sample. These systems are visually inspected and ranked. Here, we present 436 new multiply lensed and binary quasar candidates, 65 of which have redshifts from Sloan Digital Sky Survey Data Release 16. We provide redshifts for an additional 18 candidates from the SuperNova Integral Field Spectrograph.
abstractGer	The time delay between multiple images of strongly lensed quasars is a powerful tool for measuring the Hubble constant ( H _0 ). To achieve H _0 measurements with higher precision and accuracy using the time delay, it is crucial to expand the sample of lensed quasars. We conduct a search for strongly lensed quasars in the Dark Energy Spectroscopic Instrument (DESI) Legacy Imaging Surveys. The DESI Legacy Surveys comprise 19,000 deg ^2 of the extragalactic sky observed in three optical bands ( g , r , and z ), making it well suited for the discovery of new strongly lensed quasars. We apply an autocorrelation algorithm to ∼5 million objects classified as quasars in the DESI Quasar Sample. These systems are visually inspected and ranked. Here, we present 436 new multiply lensed and binary quasar candidates, 65 of which have redshifts from Sloan Digital Sky Survey Data Release 16. We provide redshifts for an additional 18 candidates from the SuperNova Integral Field Spectrograph.
abstract_unstemmed	The time delay between multiple images of strongly lensed quasars is a powerful tool for measuring the Hubble constant ( H _0 ). To achieve H _0 measurements with higher precision and accuracy using the time delay, it is crucial to expand the sample of lensed quasars. We conduct a search for strongly lensed quasars in the Dark Energy Spectroscopic Instrument (DESI) Legacy Imaging Surveys. The DESI Legacy Surveys comprise 19,000 deg ^2 of the extragalactic sky observed in three optical bands ( g , r , and z ), making it well suited for the discovery of new strongly lensed quasars. We apply an autocorrelation algorithm to ∼5 million objects classified as quasars in the DESI Quasar Sample. These systems are visually inspected and ranked. Here, we present 436 new multiply lensed and binary quasar candidates, 65 of which have redshifts from Sloan Digital Sky Survey Data Release 16. We provide redshifts for an additional 18 candidates from the SuperNova Integral Field Spectrograph.
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title_short	Finding Multiply Lensed and Binary Quasars in the DESI Legacy Imaging Surveys
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Finding Multiply Lensed and Binary Quasars in the DESI Legacy Imaging Surveys

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