Molecular Outflow in the Reionization-epoch Quasar J2054-0005 Revealed by OH 119 μm Observations
Artikel i vetenskaplig tidskrift, 2024

Molecular outflows are expected to play a key role in galaxy evolution at high redshift. To study the impact of outflows on star formation at the epoch of reionization, we performed sensitive Atacama Large Millimeter/submillimeter Array observations of OH 119 mu m toward J2054-0005, a luminous quasar at z = 6.04. The OH line is detected and exhibits a P-Cygni profile that can be fitted with a broad blueshifted absorption component, providing unambiguous evidence of an outflow, and an emission component at near-systemic velocity. The mean and terminal outflow velocities are estimated to be v(out )approximate to 670 and 1500 km s(-1), respectively, making the molecular outflow in this quasar one of the fastest at the epoch of reionization. The OH line is marginally spatially resolved for the first time in a quasar at z > 6, revealing that the outflow extends over the central 2 kpc region. The mass outflow rate is comparable to the star formation rate (M-out/SFR similar to 2), indicating rapid (similar to 10(7 )yr) quenching of star formation. The mass outflow rate in a sample of star-forming galaxies and quasars at 4 < z < 6.4 exhibits a positive correlation with the total infrared luminosity, although the scatter is large. Owing to the high outflow velocity, a large fraction (up to similar to 50%) of the outflowing molecular gas may be able to escape from the host galaxy into the intergalactic medium.

Författare

Dragan Salak

Hokkaido University

Takuya Hashimoto

University of Tsukuba

Akio K. Inoue

Waseda University

Tom Bakx

Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik

Darko Donevski

Inst Fundamental Phys Universe

Narodowe Centrum Badań Jądrowych

Leibniz Inst Analyt Wissensch ISAS eV

Yoichi Tamura

Nagoya University

Yuma Sugahara

National Astronomical Observatory of Japan

Waseda University

Nario Kuno

University of Tsukuba

Yusuke Miyamoto

University of Fukui

Seiji Fujimoto

The University of Texas at Austin

Suphakorn Suphapolthaworn

Hokkaido University

Astrophysical Journal

0004-637X (ISSN) 1538-4357 (eISSN)

Vol. 962 1 1

Ämneskategorier

Astronomi, astrofysik och kosmologi

Atom- och molekylfysik och optik

DOI

10.3847/1538-4357/ad0df5

Mer information

Senast uppdaterat

2024-08-19