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

Eduardo Bañados; Mladen Novak; Marcel Neeleman; Fabian Walter; Roberto Decarli; Bram P. Venemans; Chiara Mazzucchelli; Chris Carilli; Feige Wang; Xiaohui Fan; Emanuele P. Farina; Hans Walter Rix

doi:10.3847/2041-8213/ab3659

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

Eduardo Bañados
, Mladen Novak
, Marcel Neeleman
, Fabian Walter
, Roberto Decarli
, Bram P. Venemans
, Chiara Mazzucchelli
, Chris Carilli
, Feige Wang
, Xiaohui Fan
, Emanuele P. Farina
, Hans Walter Rix

Astronomy

Research output: Contribution to journal › Article › peer-review

39 Scopus citations

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.

Original language	English (US)
Article number	L23
Journal	Astrophysical Journal Letters
Volume	881
Issue number	1
DOIs	https://doi.org/10.3847/2041-8213/ab3659
State	Published - Aug 10 2019

Keywords

cosmology: observations
early universe
galaxies: ISM
galaxies: kinematics and dynamics
quasars: individual (ULAS J134208.10+092838.35)

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.3847/2041-8213/ab3659

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

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.",

keywords = "cosmology: observations, early universe, galaxies: ISM, galaxies: kinematics and dynamics, quasars: individual (ULAS J134208.10+092838.35)",

author = "Eduardo Ba{\~n}ados and Mladen Novak and Marcel Neeleman and Fabian Walter and Roberto Decarli and Venemans, \{Bram P.\} and Chiara Mazzucchelli and Chris Carilli and Feige Wang and Xiaohui Fan and Farina, \{Emanuele P.\} and Rix, \{Hans Walter\}",

year = "2019",

month = aug,

day = "10",

doi = "10.3847/2041-8213/ab3659",

language = "English (US)",

volume = "881",

journal = "Astrophysical Journal Letters",

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T1 - The z = 7.54 Quasar ULAS J1342+0928 Is Hosted by a Galaxy Merger

AU - Bañados, Eduardo

AU - Novak, Mladen

AU - Neeleman, Marcel

AU - Walter, Fabian

AU - Decarli, Roberto

AU - Venemans, Bram P.

AU - Mazzucchelli, Chiara

AU - Carilli, Chris

AU - Wang, Feige

AU - Fan, Xiaohui

AU - Farina, Emanuele P.

AU - Rix, Hans Walter

PY - 2019/8/10

Y1 - 2019/8/10

N2 - 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.

AB - 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.

KW - cosmology: observations

KW - early universe

KW - galaxies: ISM

KW - galaxies: kinematics and dynamics

KW - quasars: individual (ULAS J134208.10+092838.35)

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UR - https://www.scopus.com/pages/publications/85071074890#tab=citedBy

U2 - 10.3847/2041-8213/ab3659

DO - 10.3847/2041-8213/ab3659

M3 - Article

AN - SCOPUS:85071074890

SN - 2041-8205

VL - 881

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 1

M1 - L23

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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