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

35 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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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",

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

language = "English (US)",

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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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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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