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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 731476.0, MPI für Astronomie / Publikationen_mpia
Probing the interstellar medium and star formation of the most luminous quasar at z = 6.3
Authors:Wang, R.; Wu, X.-B.; Neri, R.; Fan, X.; Walter, F.; Carilli, C. L.; Momjian, E.; Bertoldi, F.; Strauss, M. A.; Li, Q.; Wang, F.; Riechers, D. A.; Jiang, L.; Omont, A.; Wagg, J.; Cox, P.
Date of Publication (YYYY-MM-DD):2016
Title of Journal:The Astrophysical Journal
Volume:830
Issue / Number:1
Start Page:id. 53 (7 pp)
Audience:Not Specified
Abstract / Description:We report new IRAM/PdBI, JCMT/SCUBA-2, and VLA observations of the ultraluminous quasar SDSS J010013.02+280225.8 (hereafter, J0100+2802) at z = 6.3, which hosts the most massive supermassive black hole (SMBH), 1.24× {10}10 {M}ȯ , that is known at z > 6. We detect the [C ii] 158 μm fine structure line and molecular CO(6-5) line and continuum emission at 353, 260, and 3 GHz from this quasar. The CO(2-1) line and the underlying continuum at 32 GHz are also marginally detected. The [C ii] and CO detections suggest active star formation and highly excited molecular gas in the quasar host galaxy. The redshift determined with the [C ii] and CO lines shows a velocity offset of ∼ 1000 {km} {{{s}}}-1 from that measured with the quasar Mg ii line. The CO (2-1) line luminosity provides a direct constraint on the molecular gas mass, which is about (1.0+/- 0.3)× {10}10 {M}ȯ . We estimate the FIR luminosity to be (3.5+/- 0.7)× {10}12 {L}ȯ , and the UV-to-FIR spectral energy distribution of J0100+2802 is consistent with the templates of the local optically luminous quasars. The derived [C ii]-to-FIR luminosity ratio of J0100+2802 is 0.0010 ± 0.0002, which is slightly higher than the values of the most FIR luminous quasars at z ∼ 6. We investigate the constraint on the host galaxy dynamical mass of J0100+2802 based on the [C ii] line spectrum. It is likely that this ultraluminous quasar lies above the local SMBH–galaxy mass relationship, unless we are viewing the system at a small inclination angle.
Free Keywords:galaxies: evolution; galaxies: high-redshift; galaxies: starburst; quasars: individual: SDSS J010013.02+280225.8
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:ISSN:0004-637X %R 10.3847/0004-637X/830/1/53
URL:http://cdsads.u-strasbg.fr/abs/2016ApJ...830...53W
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