Bright [C II] 158 μm emission in a quasar host galaxy at z = 6.54

E. Bañados, R. Decarli, F. Walter, B. P. Venemans, E. P. Farina, Xiaohui Fan

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

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 , 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 and , respectively. This results in an ratio of , 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 . We also report a tentative additional line that we identify as a blended emission from the and H<inf>2O</inf> 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.

Original languageEnglish (US)
Article numberL8
JournalAstrophysical Journal Letters
Volume805
Issue number1
DOIs
StatePublished - May 20 2015

Fingerprint

quasars
galaxies
star formation
interferometer
luminosity
active galaxies
coolants
hemispheres
brightness
interferometers
fine structure
water
detection
laboratory
emission to water
cold

Keywords

  • cosmology: observations
  • quasars: emission lines
  • quasars: general

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Bright [C II] 158 μm emission in a quasar host galaxy at z = 6.54. / Bañados, E.; Decarli, R.; Walter, F.; Venemans, B. P.; Farina, E. P.; Fan, Xiaohui.

In: Astrophysical Journal Letters, Vol. 805, No. 1, L8, 20.05.2015.

Research output: Contribution to journalArticle

Bañados, E. ; Decarli, R. ; Walter, F. ; Venemans, B. P. ; Farina, E. P. ; Fan, Xiaohui. / Bright [C II] 158 μm emission in a quasar host galaxy at z = 6.54. In: Astrophysical Journal Letters. 2015 ; Vol. 805, No. 1.
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