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Gas Dynamics of a Luminous z = 6.13 Quasar ULAS J1319+0950 Revealed by ALMA High-resolution Observations

Shao, Yali and Wang, Ran and Jones, Gareth C. and Carilli, Chris L. and Walter, Fabian and Fan, Xiaohui and Riechers, Dominik A. and Bertoldi, Frank and Wagg, Jeff and Strauss, Michael A. and Omont, Alain and Cox, Pierre and Jiang, Linhua and Narayanan, Desika and Menten, Karl M. (2017) Gas Dynamics of a Luminous z = 6.13 Quasar ULAS J1319+0950 Revealed by ALMA High-resolution Observations. Astrophysical Journal, 845 (2). Art. No. 138. ISSN 1538-4357.

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We present new Atacama Large Millimeter/submillimeter Array (ALMA) observations of the dust continuum and [C II] 158 μm fine structure line emission toward a far-infrared-luminous quasar, ULAS J131911.29+095051.4 at z = 6.13, and combine the new Cycle 1 data with ALMA Cycle 0 data. The combined data have an angular resolution of ~0.”3, and resolve both the dust continuum and the [C II] line emission on a few kiloparsec scales. The [C II] line emission is more irregular than that of the dust continuum emission, which suggests different distributions between the dust and the [C II]-emitting gas. The combined data confirm the [C II] velocity gradient that we had previously detected in a lower-resolution ALMA image from the Cycle 0 data alone. We apply a tilted ring model to the [C II] velocity map to obtain a rotation curve, and constrain the circular velocity to be 427 ± 55 km s−1 at a radius of 3.2 kpc with an inclination angle of 34°. We measure the dynamical mass within the 3.2 kpc region to be 13.4^(+7.8)_(-5.3) x 10^(10) M⊙. This yields a black-hole and host galaxy mass ratio of 0.020^(+0.013)_(-0.007), which is about 4^(+3)_(-2) times higher than that of the present-day M_(BH)/M_(bulge) ratio. This suggests that the supermassive black hole grows the bulk of its mass before the formation of most of the stellar mass in this quasar host galaxy in the early universe.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Shao, Yali0000-0002-1478-2598
Wang, Ran0000-0003-4956-5742
Jones, Gareth C.0000-0002-0267-9024
Carilli, Chris L.0000-0001-6647-3861
Walter, Fabian0000-0003-4793-7880
Fan, Xiaohui0000-0003-3310-0131
Riechers, Dominik A.0000-0001-9585-1462
Bertoldi, Frank0000-0002-1707-1775
Strauss, Michael A.0000-0002-0106-7755
Omont, Alain0000-0002-4721-3922
Cox, Pierre0000-0003-2027-8221
Jiang, Linhua0000-0003-4176-6486
Narayanan, Desika0000-0002-7064-4309
Menten, Karl M.0000-0001-6459-0669
Additional Information:© 2017 The American Astronomical Society. Received 2017 May 26; revised 2017 July 10; accepted 2017 July 11; published 2017 August 18. This work was supported by the National Key Program for Science and Technology Research and Development (grant 2016YFA0400703) and the China Scholarship Council. G.C.J. is grateful for support from NRAO through the Grote Reber Doctoral Fellowship Program. D.R. acknowledges support from the National Science Foundation under grant number AST-1614213. R.W. acknowledges supports from the National Science Foundation of China (NSFC) grant Nos. 11473004 and 11533001 and the National Key Program for Science and Technology Research and Development (grant 2016YFA0400703). D.N. acknowledges support provided by the National Science Foundation via AST-1724864. We also thank professor D.J. Mortlock for providing the Gemini NIRI spectrum of J1319+0950. This work makes use of the following ALMA data: ADS/JAO.ALMA#2011.0.00206.S and ADS/JAO.ALMA#2012.1.00240.S. ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada), MOST and ASIAA (Taiwan), and KASI (Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO and NAOJ. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. Facility: ALMA - Atacama Large Millimeter Array.
Funding AgencyGrant Number
National Key Program for Science and Technology Research and Development2016YFA0400703
China Scholarship CouncilUNSPECIFIED
National Radio Astronomy ObservatoryUNSPECIFIED
National Science Foundation of China11473004
National Science Foundation of China11533001
Subject Keywords:galaxies: active – galaxies: evolution – galaxies: high-redshift – quasars: general – radio lines: galaxies – submillimeter: galaxies
Issue or Number:2
Record Number:CaltechAUTHORS:20170821-125059093
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Official Citation:Yali Shao et al 2017 ApJ 845 138
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:80641
Deposited By: Tony Diaz
Deposited On:21 Aug 2017 20:08
Last Modified:17 Jul 2019 20:12

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