J1721+8842: The first Einstein zigzag lens

Vista sencilla de ítem
dc.contributor.authorDux F.
dc.contributor.authorMillon M.
dc.contributor.authorLemon C.
dc.contributor.authorSchmidt T.
dc.contributor.authorCourbin F.
dc.contributor.authorShajib A.J.
dc.contributor.authorTreu T.
dc.contributor.authorBirrer S.
dc.contributor.authorWong K.C.
dc.contributor.authorAgnello A.
dc.contributor.authorAndrade A.
dc.contributor.authorGalan A.
dc.contributor.authorHjorth J.
dc.contributor.authorPaic E.
dc.contributor.authorSchuldt S.
dc.contributor.authorSchweinfurth A.
dc.contributor.authorSluse D.
dc.contributor.authorSmette A.
dc.contributor.authorSuyu S.H.
dc.date.accessioned2025-06-13T20:09:17Z
dc.date.available2025-06-13T20:09:17Z
dc.date.issued2025-02
dc.descriptionIndexación: Scopus.
dc.description.abstractWe report the discovery of the first example of an Einstein zigzag lens, an extremely rare lensing configuration. In this system, J1721+8842, six images of the same background quasar are formed by two intervening galaxies, one at redshift z1 = 0.184 and another at z2 = 1.885. Two out of the six multiple images are deflected in opposite directions as they pass the first lens galaxy on one side and the second on the other side – the optical paths forming zigzags between the two deflectors. In this paper we demonstrate that J1721+8842, previously thought to be a lensed dual quasar, is in fact a compound lens, with the more distant lens galaxy also being distorted as an arc by the foreground galaxy. Evidence supporting this unusual lensing scenario includes: (1) identical light curves in all six lensed quasar images obtained from two years of monitoring at the Nordic Optical Telescope; (2) detection of the additional deflector at redshift z2 = 1.885 in JWST/NIRSpec integral field unit data; and (3) a multiple-plane lens model reproducing the observed image positions. This unique configuration offers the opportunity to combine two major lensing cosmological probes, time-delay cosmography and dual source-plane lensing, since J1721+8842 features multiple lensed sources that form two distinct Einstein radii of different sizes, one of which is a variable quasar. We expect to place tight constraints on H0 and w by combining these two probes of the same system. The z2 = 1.885 deflector, a quiescent galaxy, is also the highest-redshift strong galaxy-scale lens with a spectroscopic redshift measurement known to date. © The Authors 2025.
dc.description.urihttps://www-scopus-com.recursosbiblioteca.unab.cl/record/display.uri?eid=2-s2.0-85219586477&origin=resultslist&sort=plf-f&src=s&sid=788efc714764f31615eae1d9dcdc3afb&sot=aff&sdt=cl&cluster=scofreetoread%2C%22all%22%2Ct%2Bscosubtype%2C%22ar%22%2Ct&s=AF-ID%2860002636%29+AND+SUBJAREA%28PHYS%29&sl=34&sessionSearchId=788efc714764f31615eae1d9dcdc3afb&relpos=27
dc.identifier.citationAstronomy and Astrophysics Open Access Volume 6941 February 2025 Article number A300
dc.identifier.doi10.1051/0004-6361/202452970
dc.identifier.issn00046361
dc.identifier.urihttps://repositorio.unab.cl/handle/ria/65257
dc.language.isoen
dc.publisherEDP Sciences
dc.rights.licenseCC BY 4.0 Attribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectCosmological parameters
dc.subjectCosmology: observations
dc.subjectDark energy
dc.subjectDistance scale
dc.subjectGalaxies: evolution
dc.titleJ1721+8842: The first Einstein zigzag lens
dc.typeArtículo
Archivos
Bloque original
Mostrando 1 - 1 de 1
No hay miniatura disponible
Nombre:
J17218842-The-first-Einstein-zigzag-lens.pdf
Tamaño:
2.71 MB
Formato:
Adobe Portable Document Format
Descripción:
TEXTO COMPLETO EN INGLÉS
Descargar
Bloque de licencias
Mostrando 1 - 1 de 1
No hay miniatura disponible
Nombre:
license.txt
Tamaño:
1.71 KB
Formato:
Item-specific license agreed upon to submission
Descripción:
Descargar
Colecciones
FCE - Artículos de Revista