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The z = 7.54 Quasar ULAS J1342+0928 Is Hosted by a Galaxy Merger

Journal
Date Issued
2019
Author(s)
Bañados, Eduardo
•
Novak, Mladen
•
Neeleman, Marcel
•
Walter, Fabian
•
•
Venemans, Bram P.
•
Mazzucchelli, Chiara
•
Carilli, Chris
•
Wang, Feige
•
Fan, Xiaohui
•
Farina, Emanuele P.
•
Rix, Hans-Walter
DOI
Abstract
We present ALMA 0.″28 × 0.″20 (1.4 kpc × 1.0 kpc) resolution observations of the [C II] 158 μm line and underlying dust continuum in the host galaxy of the most distant quasar currently known, ULAS J1342+0928 at z = 7.5413. Both the [C II] and continuum are detected and spatially resolved. The [C II] line is ∼1.5 times more extended than the continuum emission, showing an elongated and complex structure of approximately 3.2 kpc × 6.4 kpc. Two separate peaks are clearly seen (≳6σ each) in three 100 km s-1 width [C II] channel maps. The velocity field of the [C II] gas does not show evidence of a coherent rotation field but rather chaotic motion reminiscent of an ongoing merger.
Volume
881
Issue
1
Start page
L23
Uri
Url
Issn Identifier
0004-637X
Ads BibCode
2019ApJ...881L..23B
Rights
open.access
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