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dc.contributor.authorGoicoechea Santamaría, Luis Julián 
dc.contributor.authorShalyapin, Vyacheslav 
dc.contributor.otherUniversidad de Cantabriaes_ES
dc.date.accessioned2020-03-20T07:39:56Z
dc.date.available2020-03-20T07:39:56Z
dc.date.issued2019-12
dc.identifier.issn0004-637X
dc.identifier.issn1538-4357
dc.identifier.otherAYA2017-89815-Pes_ES
dc.identifier.urihttp://hdl.handle.net/10902/18417
dc.description.abstractBecause follow–up observations of quadruple gravitational lens systems are of extraordinary importance for astrophysics and cosmology, we present single-epoch optical spectra and r-band light curves of PS J0147+4630. This recently discovered system mainly consists of four images ABCD of a background quasar around a foreground galaxy G that acts as a gravitational lens. First, we use long-slit spectroscopic data in the Gemini Observatory Archive and a multi-component fittting to accurately resolve the spectra of A, D, and G. The spectral profile of G resembles that of an early-type galaxy at a redshift of 0.678±0.001, which is about 20% higher than the previous estimate. Additionally, the stellar velocity dispersion is measured to ∼5% precision. Second, our early r-band monitoring with the Liverpool Telescope leads to accurate light curves of the four quasar images. Adopting time delays predicted by the lens model, the new lens redshift, and a standard cosmology, we report the detection of microlensing variations in C and D as large as ∼0.1 mag on timescales of a few hundred days. We also estimate an actual delay between A and B of a few days (B is leading), which demonstrates the big potential of optical monitoring campaigns of PS J0147+4630.es_ES
dc.description.sponsorshipThis research has been conducted in the framework of the Gravitational LENses and DArk MAtter (GLENDAMA) project, which is supported by the MINECO/AEI/FEDER-UE grant AYA2017-89815-P and the University of Cantabriaes_ES
dc.format.extent8 p.es_ES
dc.language.isoenges_ES
dc.publisherInstitute of Physics Publishinges_ES
dc.rights© IOP Publishinges_ES
dc.sourceApJ 887 126 (2019)es_ES
dc.subject.otherBroad-absorption line quasares_ES
dc.subject.otherStrong gravitational lensinges_ES
dc.subject.otherQuasar microlensinges_ES
dc.titleGravitational Lens System PS J0147+4630 (Andromeda's Parachute): Main Lensing Galaxy and Optical Variability of the Quasar Imageses_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.relation.publisherVersionhttps://doi.org/10.3847/1538-4357/ab5063es_ES
dc.rights.accessRightsopenAccesses_ES
dc.identifier.DOI10.3847/1538-4357/ab5063
dc.type.versionpublishedVersiones_ES


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