2011A&A...532L..10M


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.08CEST03:56:20

2011A&A...532L..10M - Astronomy and Astrophysics, volume 532, L10-10 (2011/8-1)

Chemical properties in the most distant radio galaxy.

MATSUOKA K., NAGAO T., MAIOLINO R., MARCONI A. and TANIGUCHI Y.

Abstract (from CDS):

We present a deep optical spectrum of TN J0924-2201, the most distant radio galaxy at z=5.19, obtained with FOCAS on the Subaru Telescope. We successfully detect, for the first time, the CIVλ1549 emission line from the narrow-line region. In addition to the emission-line fluxes of Lyα and CIV, we set upper limits on the NV and HeII emissions. We use these line detections and upper limits to constrain the chemical properties of TN J0924-2201. By comparing the observed emission-line flux ratios with photoionization models, we infer that the carbon-to-oxygen relative abundance is already [C/O]>-0.5 at a cosmic age of ∼1.1Gyr. This lower limit on [C/O] is higher than the ratio expected at the earliest phases of the galaxy chemical evolution, indicating that TN J0924-2201 has already experienced significant chemical evolution at z=5.19.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: nuclei - quasars: emission lines - quasars: general

Simbad objects: 2

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Number of rows : 2

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 BD+52 913 WD* 05 05 30.6182785658 +52 49 51.920797126 10.25 11.44 11.69 11.93 12.108 DA.8 983 0
2 [DVR2000] TN J0924-2201 rG 09 24 19.94 -22 01 42.2       25.850   ~ 77 0

    Equat.    Gal    SGal    Ecl

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2020.07.08-03:56:20

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