LBT/LUCIFER observations of the z ~ 2 lensed galaxy J0900+2234
-
Altmetric Citations
Bian, Fuyan; Fan, Xiaohui; Bechtold, Jill; McGreer, Ian; Just, Dennis W; Sand, David J; Green, Richard F; Thompson, D; Peng, Chien Y; Seifert, Walter; Ageorges, Nancy; Juette, E; Knierim, Volker; Buschkamp, Peter
Description
We present rest-frame optical images and spectra of the gravitationally lensed, star-forming galaxy J0900+2234 (z = 2.03). The observations were performed with the newly commissioned LUCIFER1 near-infrared (NIR) instrument mounted on the Large Binocular Telescope. We fitted lens models to the rest-frame optical images and found that the galaxy has an intrinsic effective radius of 7.4 ± 0.8 kpc with a lens magnification factor of about 5 for the A and B components. We also discovered a new arc...[Show more]
dc.contributor.author | Bian, Fuyan | |
---|---|---|
dc.contributor.author | Fan, Xiaohui | |
dc.contributor.author | Bechtold, Jill | |
dc.contributor.author | McGreer, Ian | |
dc.contributor.author | Just, Dennis W | |
dc.contributor.author | Sand, David J | |
dc.contributor.author | Green, Richard F | |
dc.contributor.author | Thompson, D | |
dc.contributor.author | Peng, Chien Y | |
dc.contributor.author | Seifert, Walter | |
dc.contributor.author | Ageorges, Nancy | |
dc.contributor.author | Juette, E | |
dc.contributor.author | Knierim, Volker | |
dc.contributor.author | Buschkamp, Peter | |
dc.date.accessioned | 2015-12-13T22:17:55Z | |
dc.identifier.issn | 0004-637X | |
dc.identifier.uri | http://hdl.handle.net/1885/71385 | |
dc.description.abstract | We present rest-frame optical images and spectra of the gravitationally lensed, star-forming galaxy J0900+2234 (z = 2.03). The observations were performed with the newly commissioned LUCIFER1 near-infrared (NIR) instrument mounted on the Large Binocular Telescope. We fitted lens models to the rest-frame optical images and found that the galaxy has an intrinsic effective radius of 7.4 ± 0.8 kpc with a lens magnification factor of about 5 for the A and B components. We also discovered a new arc belonging to another lensed high-z source galaxy, which makes this lens system a potential double Einstein ring system. Using the high signalto-noise ratio rest-frame spectra covered by the H+ K band, we detected Hβ, [O iii], Hα, [N ii], and [S ii] emission lines. Detailed physical properties of this high-z galaxy were derived. The extinction toward the ionized H ii regions (Eg(B -V )) was computed from the flux ratio of Hα and Hβ and appears to be much higher than that toward the stellar continuum (Es (B -V )), derived from the optical and NIR broadband photometry fitting. The metallicity was estimated using N2 and O3N2 indices. It is in the range of 1/5 -1/3 solar abundance, which is much lower than for typical z ∼ 2 star-forming galaxies. From the flux ratio of [S ii]λ6717 and [S ii]λ6732, we found that the electron number density of the H ii regions in the high-z galaxy was ≃1000 cm-3, consistent with other z ∼ 2 galaxies butmuch higher than that in local H ii regions. The star formation rate was estimated via the Hα luminosity, after correction for the lens magnification, to be about 365±69M⊙ yr-1. Combining the FWHM of Hα emission lines and the half-light radius, we found that the dynamical mass of the lensed galaxy is (5.8 ± 0.9) × 1010M⊙. The gas mass is (5.1 ± 1.1) × 1010M⊙ from the Hα flux surface density using global Kennicutt-Schmidt law, indicating a very high gas fraction of 0.79 ± 0.19 in J0900+2234. | |
dc.publisher | IOP Publishing | |
dc.source | Astrophysical Journal, The | |
dc.subject | Keywords: Galaxies abundances; Galaxies:evolution; Galaxies:High-Redshift; Galaxies:ISM; Gravitational lensing:Strong | |
dc.title | LBT/LUCIFER observations of the z ~ 2 lensed galaxy J0900+2234 | |
dc.type | Journal article | |
local.description.notes | Imported from ARIES | |
local.identifier.citationvolume | 725 | |
dc.date.issued | 2010 | |
local.identifier.absfor | 020103 - Cosmology and Extragalactic Astronomy | |
local.identifier.ariespublication | U3488905xPUB2688 | |
local.type.status | Published Version | |
local.contributor.affiliation | Bian, Fuyan, College of Physical and Mathematical Sciences, ANU | |
local.contributor.affiliation | Fan, Xiaohui, University of Arizona | |
local.contributor.affiliation | Bechtold, Jill, University of Arizona | |
local.contributor.affiliation | McGreer, Ian, University of Arizona | |
local.contributor.affiliation | Just, Dennis W, University of Arizona | |
local.contributor.affiliation | Sand, David J, Harvard-Smithsonian Center for Astrophysics | |
local.contributor.affiliation | Green, Richard F, University of Arizona | |
local.contributor.affiliation | Thompson, D, University of Arizona | |
local.contributor.affiliation | Peng, Chien Y, National Research Council of Canada | |
local.contributor.affiliation | Seifert, Walter, Zentrum fur Astronomie der Universitat Heidelberg | |
local.contributor.affiliation | Ageorges, Nancy, Max Planck Institute for Extraterrestrial Physics | |
local.contributor.affiliation | Juette, E, Ruhr-University Bochum | |
local.contributor.affiliation | Knierim, Volker, Ruhr-Universit¨at | |
local.contributor.affiliation | Buschkamp, Peter, Max-Planck Insitut Fur extraterrestrische Physik | |
local.description.embargo | 2037-12-31 | |
local.bibliographicCitation.issue | 2 | |
local.bibliographicCitation.startpage | 1877 | |
local.bibliographicCitation.lastpage | 1885 | |
local.identifier.doi | 10.1088/0004-637X/725/2/1877 | |
dc.date.updated | 2016-02-24T10:02:42Z | |
local.identifier.scopusID | 2-s2.0-77958135144 | |
Collections | ANU Research Publications |
Download
File | Description | Size | Format | Image |
---|---|---|---|---|
01_Bian_LBT/LUCIFER_observations_of_2010.pdf | 1.72 MB | Adobe PDF | Request a copy |
Items in Open Research are protected by copyright, with all rights reserved, unless otherwise indicated.
Updated: 17 November 2022/ Responsible Officer: University Librarian/ Page Contact: Library Systems & Web Coordinator