Chemical properties in the most distant radio galaxy

Details Chemical properties in the most distant radio galaxy Chemical properties in the most distant radio galaxy

2011-07-26

arxiv.org/abs/1107.5116v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Accepted for publication in A&A, 5 pages, 3 figures

Scientific paper

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 CIV1549 emission line from the narrow-line region (NLR). In addition to the emission-line fluxes of Ly alpha 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 ~ 1.1 Gyr. 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.

Affiliated with

Also associated with

No associations

Rating

Chemical properties in the most distant radio galaxy does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Chemical properties in the most distant radio galaxy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chemical properties in the most distant radio galaxy will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-93095