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Resolving the Interstellar Medium in the Nuclear Region of Two z = 5.78 Quasar Host Galaxies with ALMA

Wang, Ran and Shao, Yali and Carilli, Chris L. and Jones, Gareth C. and Walter, Fabian and Fan, Xiaohui and Riechers, Dominik A. and Decarli, Roberto 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. and Venemans, Bram P. (2019) Resolving the Interstellar Medium in the Nuclear Region of Two z = 5.78 Quasar Host Galaxies with ALMA. Astrophysical Journal, 887 (1). Art. No. 40. ISSN 1538-4357.

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We present ALMA observations of the [C II] 158 μm fine structure line and dust continuum emission from two quasars, SDSS J104433.04−012502.2 and SDSS J012958.51−003539.7, at z = 5.78. The ALMA observations at 0.”2 resolution map the dust and gas on kiloparsec scales. The spatially resolved emission shows a similar trend of decreasing [C II]–far-infrared (FIR) ratios with increasing FIR surface brightnesses as was found in the infrared luminous galaxies with intense star formation. We confirm the velocity gradients of [C II] emission found previously in SDSS J0129−0035. No clear evidence of order motion is detected in SDSS J1044−0125. The velocity maps and position–velocity diagrams also suggest turbulent gas clumps in both objects. We tentatively detect a [C II] peak offset 4.9 kpc to the east of SDSS J1044−0125. This may be associated with an infalling companion, or node of gas outflow. All these results suggest significant dynamical evolution of the interstellar medium in the nuclear region of these young quasar-starburst systems. We fit the velocity map of the [C II] emission from SDSS J0129−0035 with a rotating disk model. The result suggests a face-on system with an inclination angle of 16° ± 20° and constrains the lower limit of the host galaxy dynamical mass to be 2.6 × 10¹⁰ M ⊙ within the [C II] emitting region. It is likely that SDSS J0129−0035, as well as other young quasars with supermassive black hole masses on the order of 10⁷ M⊙ to 10⁸ M⊙, falls close to the black hole and host galaxy mass relation defined by local galaxies.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Wang, Ran0000-0003-4956-5742
Shao, Yali0000-0002-1478-2598
Carilli, Chris L.0000-0001-6647-3861
Jones, Gareth C.0000-0002-0267-9024
Walter, Fabian0000-0003-4793-7880
Fan, Xiaohui0000-0003-3310-0131
Riechers, Dominik A.0000-0001-9585-1462
Decarli, Roberto0000-0002-2662-8803
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
Venemans, Bram P.0000-0001-9024-8322
Additional Information:© 2019 The American Astronomical Society. Received 2018 August 17; revised 2019 October 6; accepted 2019 October 10; published 2019 December. This work was supported by National Key Program for Science and Technology Research and Development (grant 2016YFA0400703). We are thankful for the support from the National Science Foundation of China (NSFC) grant Nos. 11721303, 11373008, 11533001, 11473004, the Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences, grant No. XDB09000000, and the National Key Basic Research Program of China 2014CB845700. R.W. acknowledges support from the Thousand Youth Talents Program of China and the NSFC grant Nos. 11443002 and 11473004. D.R. acknowledges support from the National Science Foundation under grant No. AST-1614213. D.N. was funded in part by NSF AST-1715206 and HST AR-15043.0001. The National Radio Astronomy Observatory (NRAO) is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. This paper makes use of the following ALMA data: ADS/JAO.ALMA#2011.0.00206.S and #2012.1.00240.S. ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada) and NSC and ASIAA (Taiwan), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO, and NAOJ. R.W. thanks Dr Matus Rybak for providing the resolved [C II] and FIR continuum measurements of their SMG sample. R.W. thanks Dr Shangguan for providing FIR luminosities of the GOALS sample. Facilities: ALMA.
Funding AgencyGrant Number
National Key Basic Research Program of China2016YFA0400703
National Natural Science Foundation of China11721303
National Natural Science Foundation of China11373008
National Natural Science Foundation of China11533001
National Natural Science Foundation of China11473004
Chinese Academy of SciencesXDB09000000
National Key Basic Research Program of China2014CB845700
Thousand Youth Talents Program of ChinaUNSPECIFIED
National Natural Science Foundation of China11443002
National Natural Science Foundation of China11473004
NASA Hubble FellowshipHST AR-15043.0001
Subject Keywords:galaxies: active – galaxies: evolution – galaxies: high-redshift
Issue or Number:1
Record Number:CaltechAUTHORS:20191209-104644765
Persistent URL:
Official Citation:Ran Wang et al 2019 ApJ 887 40
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:100239
Deposited By: Tony Diaz
Deposited On:09 Dec 2019 18:54
Last Modified:09 Dec 2019 18:54

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