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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 720396.0, MPI für Astronomie / Publikationen_mpia
Bright [C II] 158 μm emission in a quasar host galaxy at z = 6.54
Authors:Bañados, E.; Decarli, R.; Walter, F.; Venemans, B. P.; Farina, E. P.; Fan, X.
Date of Publication (YYYY-MM-DD):2015
Title of Journal:The Astrophysical Journal Letters
Issue / Number:1
Start Page:id. L8 (4 pp)
Audience:Not Specified
Abstract / Description:The [C ii] 158 μm fine-structure line is known to trace regions of active star formation and is the main coolant of the cold, neutral atomic medium. In this Letter, we report a strong detection of the [C ii] line in the host galaxy of the brightest quasar known at z\gt 6.5, the Pan-STARRS1 selected quasar PSO J036.5078+03.0498 (hereafter P036+03), using the IRAM NOEMA millimeter interferometer. Its [C ii] and total far-infrared luminosities are (5.8+/- 0.7)× {{10}9} {{L}} and (7.6+/- 1.5)× {{10}12} {{L}}, respectively. This results in an {{L}[C II]}/{{L}TIR} ratio of ˜ 0.8× {{10}-3}, which is at the high end of those found for active galaxies, though it is lower than the average found in typical main-sequence galaxies at z˜ 0. We also report a tentative additional line that we identify as a blended emission from the {{3}22}-{{3}13} and {{5}23}-{{4}32} H2O transitions. If confirmed, this would be the most distant detection of water emission to date. P036+03 rivals the current prototypical luminous J1148+5251 quasar at z = 6.42, in both rest-frame UV and [C ii] luminosities. Given its brightness and because it is visible from both hemispheres (unlike J1148+5251), P036+03 has the potential of becoming an important laboratory for the study of star formation and of the interstellar medium only ˜800 Myr after the Big Bang. Based on observations carried out under project number E14AG with the IRAM NOEMA Interferometer. IRAM is supported by INSU/CNRS (France), MPG (Germany), and IGN (Spain).
Free Keywords:cosmology: observations; quasars: emission lines; quasars: general
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:ISSN:0004-637X %R 10.1088/2041-8205/805/1/L8
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