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Star Formation and ISM Properties in the Host Galaxies of Three Far-infrared Luminous Quasars at z ∼ 6

Shao, Yali and Wang, Ran and Carilli, Chris L. and Wagg, Jeff and Walter, Fabian and Li, Jianan and Fan, Xiaohui and Jiang, Linhua and Riechers, Dominik A. and Bertoldi, Frank and Strauss, Michael A. and Cox, Pierre and Omont, Alain and Menten, Karl M. (2019) Star Formation and ISM Properties in the Host Galaxies of Three Far-infrared Luminous Quasars at z ∼ 6. Astrophysical Journal, 876 (2). Art. No. 99. ISSN 1538-4357.

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We present Karl G. Jansky Very Large Array observations of the CO (2−1) line emission toward three far-infrared luminous quasars at z ~ 6: SDSS J231038.88+185519.7 and SDSS J012958.51−003539.7 with ~0.”6 resolution and SDSS J205406.42−000514.8 with ~2.”1 resolution. All three sources are detected in the CO (2−1) line emission—one source is marginally resolved, and the other two appear as point sources. Measurements of the CO (2−1) line emission allow us to calculate the molecular gas mass even without a CO excitation model. The inferred molecular gas masses are (0.8–4.3) × 10^(10) M_⊙. The widths and redshifts derived from the CO (2−1) line are consistent with previous CO (6−5) and [C II] measurements. We also report continuum measurements using Herschel for SDSS J231038.88+185519.7 and SDSS J012958.51−003539.7, and for SDSS J231038.88+185519.7 data obtained at ~140 and ~300 GHz using the Atacama Large Millimeter/submillimeter Array. In the case of SDSS J231038.88+185519.7, we present a detailed analysis of the spectral energy distribution and derive the dust temperature (~40 K), the dust mass (~10^9 M_⊙), the far-infrared luminosity (8–1000 μm; ~10^(13) L_⊙), and the star formation rate (2400–2700 M_⊙ yr^(−1)). Finally, an analysis of the photodissociation regions associated with the three high-redshift quasars indicates that the interstellar medium in these sources has similar properties to local starburst galaxies.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Shao, Yali0000-0002-1478-2598
Wang, Ran0000-0003-4956-5742
Carilli, Chris L.0000-0001-6647-3861
Walter, Fabian0000-0003-4793-7880
Fan, Xiaohui0000-0003-3310-0131
Jiang, Linhua0000-0003-4176-6486
Riechers, Dominik A.0000-0001-9585-1462
Bertoldi, Frank0000-0002-1707-1775
Strauss, Michael A.0000-0002-0106-7755
Cox, Pierre0000-0003-2027-8221
Omont, Alain0000-0002-4721-3922
Menten, Karl M.0000-0001-6459-0669
Additional Information:© 2019 The American Astronomical Society. Received 2018 December 8; revised 2019 March 4; accepted 2019 March 24; published 2019 May 8. We acknowledge support from the National Key R&D Program of China (2016YFA0400703). R.W. acknowledges supports from the National Science Foundation of China (NSFC) grants No. 11473004, 11533001. D.R. acknowledges support from the National Science Foundation under grant No. AST-1614213. F.B. acknowledges support through the Collaborative Research Centre 956, sub-project A01, funded by the Deutsche Forschungsgemeinschaft (DFG), project ID 184018867. This work makes use of the ALMA data: ADS/JAO.ALMA#2015.1.01265.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. Facilities: Herschel - European Space Agency's Herschel space observatory, VLA - , ALMA. -
Funding AgencyGrant Number
National Key Basic Research Program of China2016YFA0400703
National Natural Science Foundation of China11473004
National Natural Science Foundation of China11533001
Deutsche Forschungsgemeinschaft (DFG)956
Subject Keywords:galaxies: active – galaxies: evolution – galaxies: high-redshift – quasars: general – radio lines: galaxies – submillimeter: galaxies
Issue or Number:2
Record Number:CaltechAUTHORS:20190508-091822924
Persistent URL:
Official Citation:Yali Shao et al 2019 ApJ 876 99
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:95341
Deposited By: Tony Diaz
Deposited On:08 May 2019 23:53
Last Modified:03 Oct 2019 21:12

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