Resolving the Interstellar Medium in the Nuclear Region of Two z = 5.78 Quasar Host Galaxies with ALMA
Carilli, Chris L.
Jones, Gareth C.
Riechers, Dominik A.
Strauss, Michael A.
Menten, Karl M.
Venemans, Bram P.
AffiliationUniv Arizona, Steward Observ
MetadataShow full item record
PublisherIOP PUBLISHING LTD
CitationRan Wang et al 2019 ApJ 887 40
RightsCopyright © 2019. The American Astronomical Society. All rights reserved.
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at firstname.lastname@example.org.
AbstractWe present ALMA observations of the [C II] 158 mu m 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 degrees +/- 20 degrees and constrains the lower limit of the host galaxy dynamical mass to be 2.6 x 10(10) M-circle dot 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 10(7) M-circle dot to 10(8)M(circle dot), falls close to the black hole and host galaxy mass relation defined by local galaxies.
VersionFinal published version
SponsorsNational Key Program for Science and Technology Research and Development [2016YFA0400703]; National Science Foundation of China (NSFC)National Natural Science Foundation of China [11721303, 11373008, 11533001, 11473004]; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences [XDB09000000]; National Key Basic Research Program of ChinaNational Basic Research Program of China [2014CB845700]; Thousand Youth Talents Program of China; NSFCNational Natural Science Foundation of China [11473004, 11443002]; National Science FoundationNational Science Foundation (NSF) [AST-1614213]; NSFNational Science Foundation (NSF) [AST-1715206, HST AR-15043.0001]