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Far-Infrared Properties of the Bright, Gravitationally Lensed Quasar J0439+1634 at z=6.5
- Source :
- The Astrophysical Journal
- Publication Year :
- 2019
- Publisher :
- arXiv, 2019.
-
Abstract
- We present IRAM/NOEMA, JCMT/SCUBA-2 and VLA observations of the most distant known gravitationally lensed quasar J0439+1634 at z = 6.5. We detect strong dust emission, [CII] 158 $\mu$m, [CI] 369 $\mu$m, [OI] 146 $\mu$m, CO(6-5), CO(7-6), CO(9-8), CO(10-9), H$_{\rm 2}$O $3_{\rm 1,2}-2_{\rm 2,1}$, and H$_{\rm 2}$O $3_{\rm 2,1}-3_{\rm 1,2}$ lines as well as a weak radio continuum. The strong [CII] line yields a systemic redshift of the host galaxy to be z=6.5188$\pm$0.0001. The magnification makes J0439+1634 the far-infrared (FIR) brightest quasar at z > 6 known, with the brightest [CII] line yet detected at this redshift. The FIR luminosity is (3.4$\pm$0.2)$\times$10$^{13}$ $\mu^{-1}$ $L_{\odot}$, where $\mu$ $\sim$ 2.6 - 6.6 is the magnification of the host galaxy, estimated based on the lensing configuration from HST imaging. We estimate the dust mass to be (2.2$\pm$0.1)$\times$10$^{9}$ $\mu^{-1}$ $M_{\odot}$. The CO Spectral Line Energy Distribution using four CO lines is best fit by a two-component model of the molecular gas excitation. The estimates of molecular gas mass derived from CO lines and atomic carbon mass are consistent, in the range of 3.9 - 8.9 $\times$10$^{10} \mu^{-1}$ $M_{\odot}$. The [CII]/[CI], [CII]/CO, and [OI]/[CII] line luminosity ratios suggest a photodissociation region model with more than one component. The ratio of H$_{\rm 2}$O $3_{\rm 2,1}-3_{\rm 1,2}$ line luminosity to $L_{\rm TIR}$ is consistent with values in local and high redshift ultra-/hyper-luminous infrared galaxies. The VLA observations reveal an unresolved radio continuum source, and indicate that J0439+1634 is a radio quiet quasar with R = 0.05 - 0.17.<br />Comment: 13 pages, 6 figures. Accepted by ApJ
- Subjects :
- Physics
COSMIC cancer database
010504 meteorology & atmospheric sciences
Astronomy
FOS: Physical sciences
Astronomy and Astrophysics
Quasar
Astrophysics - Astrophysics of Galaxies
01 natural sciences
Far infrared
Space and Planetary Science
Astrophysics of Galaxies (astro-ph.GA)
0103 physical sciences
010303 astronomy & astrophysics
0105 earth and related environmental sciences
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- The Astrophysical Journal
- Accession number :
- edsair.doi.dedup.....300e19d043dad765d665fc0abfdd7c21
- Full Text :
- https://doi.org/10.48550/arxiv.1907.00385