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Spatially Resolved Patchy Lya Emission within the Central Kiloparsec of a Strongly Lensed Quasar Host Galaxy at z = 2.8

Bayliss, Matthew B; Sharon, Keren; Acharyya, Ayan; Gladders, Michael D; Rigby, J R; Bian, Fuyan; Bordoloi, Rongmon; Runnoe, Jessie; Dahle, Hakon; Kewley, Lisa; Florian, Michael; Johnson, Traci; Paterno-Mahler, Rachel

Description

We report the detection of extended Lyα emission from the host galaxy of SDSS J2222+2745, a strongly lensed quasar at z = 2.8. Spectroscopic follow-up clearly reveals extended Lyα in emission between two images of the central active galactic nucleus (AGN). We reconstruct the lensed quasar host galaxy in the source plane by applying a strong lens model to HST imaging and resolve spatial scales as small as ∼200 pc. In the source plane, we recover the host galaxy morphology to within a few...[Show more]

dc.contributor.authorBayliss, Matthew B
dc.contributor.authorSharon, Keren
dc.contributor.authorAcharyya, Ayan
dc.contributor.authorGladders, Michael D
dc.contributor.authorRigby, J R
dc.contributor.authorBian, Fuyan
dc.contributor.authorBordoloi, Rongmon
dc.contributor.authorRunnoe, Jessie
dc.contributor.authorDahle, Hakon
dc.contributor.authorKewley, Lisa
dc.contributor.authorFlorian, Michael
dc.contributor.authorJohnson, Traci
dc.contributor.authorPaterno-Mahler, Rachel
dc.date.accessioned2021-09-20T06:17:30Z
dc.identifier.issn2041-8205
dc.identifier.urihttp://hdl.handle.net/1885/248235
dc.description.abstractWe report the detection of extended Lyα emission from the host galaxy of SDSS J2222+2745, a strongly lensed quasar at z = 2.8. Spectroscopic follow-up clearly reveals extended Lyα in emission between two images of the central active galactic nucleus (AGN). We reconstruct the lensed quasar host galaxy in the source plane by applying a strong lens model to HST imaging and resolve spatial scales as small as ∼200 pc. In the source plane, we recover the host galaxy morphology to within a few hundred parsecs of the central AGN and map the extended Lyα emission to its physical origin on one side of the host galaxy at radii ∼0.5–2 kpc from the central AGN. There are clear morphological differences between the Lyα and rest-frame ultraviolet stellar continuum emission from the quasar host galaxy. Furthermore, the relative velocity profiles of quasar Lyα, host galaxy Lyα, and metal lines in outflowing gas reveal differences in the absorbing material affecting the AGN and host galaxy. These data indicate the presence of patchy local intervening gas in front of the central quasar and its host galaxy. This interpretation is consistent with the central luminous quasar being obscured across a substantial fraction of its surrounding solid angle, resulting in strong anisotropy in the exposure of the host galaxy to ionizing radiation from the AGN. This work demonstrates the power of strong-lensing-assisted studies to probe spatial scales that are currently inaccessible by other means.
dc.description.sponsorshipThis work was supported in part by a NASA Keck PI Data Award, administered by the NASA Exoplanet Science Institute, by NASA grant HST-GO-13337, and by an Australian Government astronomy research infrastructure grant, via the Department of Industry and Science. M.B.B. was supported, in part, from NASA grants HST-GO-13639 and HST-GO-14896. R.B. was supported by NASA through Hubble Fellowship grant #51354 awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS 5-26555.
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherInstitute of Physics Publishing Ltd.
dc.rights© 2017. The American Astronomical Society
dc.sourceAstrophysical Journal Letters
dc.subjectgalaxies: high-redshift
dc.subjectgravitational lensing: strong
dc.subjectquasars: emission lines
dc.subjectquasars: general
dc.titleSpatially Resolved Patchy Lya Emission within the Central Kiloparsec of a Strongly Lensed Quasar Host Galaxy at z = 2.8
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume845
dc.date.issued2017
local.identifier.absfor020104 - Galactic Astronomy
local.identifier.absfor020103 - Cosmology and Extragalactic Astronomy
local.identifier.ariespublicationa383154xPUB8406
local.publisher.urlhttp://iopscience.iop.org/
local.type.statusPublished Version
local.contributor.affiliationBayliss, Matthew B, Massachusetts Institute of Technology
local.contributor.affiliationSharon, Keren, University of Michigan
local.contributor.affiliationAcharyya, Ayan, College of Science, ANU
local.contributor.affiliationGladders, Michael D, University of Chicago
local.contributor.affiliationRigby, J R, NASA Goddard Space Flight Center
local.contributor.affiliationBian, Fuyan, College of Science, ANU
local.contributor.affiliationBordoloi, Rongmon, Massachusetts Institute of Technology
local.contributor.affiliationRunnoe, Jessie, University of Michigan
local.contributor.affiliationDahle, Hakon, University of Oslo
local.contributor.affiliationKewley, Lisa, College of Science, ANU
local.contributor.affiliationFlorian, Michael, University of Chicago
local.contributor.affiliationJohnson, Traci, University of Michigan
local.contributor.affiliationPaterno-Mahler, Rachel, University of Michigan
local.description.embargo2099-12-31
local.bibliographicCitation.issue2
local.identifier.doi10.3847/2041-8213/aa831a
dc.date.updated2020-11-23T11:09:20Z
local.identifier.scopusID2-s2.0-85028463447
local.identifier.thomsonID000407971200002
CollectionsANU Research Publications

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