High-resolution spatial analysis of a z ∼ 2 lensed galaxy using adaptive coadded source-plane reconstruction
| Autor: | Anshu Gupta, Lisa J. Kewley, Nicha Leethochawalit, Soniya Sharma, Tiantian Yuan, Johan Richard, Tucker Jones, Vera Patrício |
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| Přispěvatelé: | Centre de Recherche Astrophysique de Lyon (CRAL), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
astro-ph.GA
media_common.quotation_subject FOS: Physical sciences High resolution Astrophysics::Cosmology and Extragalactic Astrophysics Astronomy & Astrophysics 01 natural sciences 0103 physical sciences kinematics and dynamics [galaxies] 010303 astronomy & astrophysics galaxies: kinematics and dynamics Astrophysics::Galaxy Astrophysics media_common Physics 010308 nuclear & particles physics gravitational lensing: strong Astronomy Astronomy and Astrophysics Astrophysics - Astrophysics of Galaxies groups: individual [galaxies] Galaxy [SDU]Sciences of the Universe [physics] Space and Planetary Science Research council Sky Astrophysics of Galaxies (astro-ph.GA) strong [gravitational lensing] Source plane galaxies: groups: individual (SDSS1958+5950) Astronomical and Space Sciences |
| Zdroj: | Sharma, Soniya; Richard, Johan; Yuan, Tiantian; Gupta, Anshu; Kewley, Lisa; Patrício, Vera; et al.(2018). High-resolution spatial analysis of a z ∼ 2 lensed galaxy using adaptive coadded source-plane reconstruction. Monthly Notices of the Royal Astronomical Society, 481(2), 1427-1440. doi: 10.1093/mnras/sty2352. UC Davis: Retrieved from: http://www.escholarship.org/uc/item/3zh404fm Monthly Notices of the Royal Astronomical Society Monthly Notices of the Royal Astronomical Society, 2018, 481, pp.1427-1440. ⟨10.1093/mnras/sty2352⟩ Monthly Notices of the Royal Astronomical Society, vol 481, iss 2 |
| ISSN: | 0035-8711 1365-2966 |
| Popis: | We present spatially resolved analysis of a lensed galaxy, SDSS1958+5950 at $z = 2.225$, from the Cambridge Sloan Survey of Wide Arcs in the Sky (CASSOWARY). We use our new high resolution imaging data to construct a robust lens model for the galaxy group at $z = 0.214$. We employ the updated lens model to combine the Integral Field Spectrographic observations on two highly distorted images of the lensed target. We adopt a forward-modeling approach to deconvolve the effects of point spread function from the combined source-plane reconstruction. The approach is adapted to the lens model magnification and enables a resolution of $\sim$170 pc in the galaxy-source plane. We propose an ongoing merger as the origin of the lensed system on the basis of its source-plane morphology, kinematics and rest-frame emission line ratios. Using our novel technique of adaptive coadded source plane reconstruction, we are able to detect different components in the velocity gradient that were not seen in previous studies of this object, plausibly belonging to different components in the merging system. 15 pages, 9 Figures, Accepted for publication in MNRAS |
| Databáze: | OpenAIRE |
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