SIMBAD references

2019ApJ...871...85L - Astrophys. J., 871, 85-85 (2019/January-3)

The ISM properties and gas kinematics of a redshift 3 massive dusty star-forming galaxy.

LEUNG T.K.D., RIECHERS D.A., BAKER A.J., CLEMENTS D.L., COORAY A., HAYWARD C.C., IVISON R.J., NERI R., OMONT A., PEREZ-FOURNON I., SCOTT D. and WARDLOW J.L.

Abstract (from CDS):

We present CO (J = 1 - 0; 3 - 2; 5 - 4; 10 - 9) and 1.2 kpc resolution [C II] line observations of the dusty star-forming galaxy (SFG) HXMM05-carried out with the Karl G. Jansky Very Large Array, the Combined Array for Research in Millimeter-wave Astronomy, the Plateau de Bure Interferometer, and the Atacama Large Millimeter/submillimeter Array, measuring an unambiguous redshift of z = 2.9850 ± 0.0009. We find that HXMM05 is a hyperluminous infrared galaxy (LIR = (4 ± 1) x 1013 L) with a total molecular gas mass of (2.1 ± 0.7) x 1011CO/0.8) M. The CO (J = 1 - 0) and [C II] emission are extended over ∼9 kpc in diameter, and the CO line FWHM exceeds 1100 km s–1. The [C II] emission shows a monotonic velocity gradient consistent with a disk, with a maximum rotation velocity of vc = 616 ± 100 km s–1 and a dynamical mass of (7.7 ± 3.1) x 1011 M. We find a star formation rate of 2900–595+750M yr–1. HXMM05 is thus among the most intensely SFGs known at high redshift. Photodissociation region modeling suggests physical conditions similar to nearby SFGs, showing extended star formation, which is consistent with our finding that the gas emission and dust emission are cospatial. Its molecular gas excitation resembles the local major merger Arp 220. The broad CO and [C II] lines and a pair of compact dust nuclei suggest the presence of a late-stage major merger at the center of the extended disk, again reminiscent of Arp 220. The observed gas kinematics and conditions, together with the presence of a companion and the pair of nuclei, suggest that HXMM05 is experiencing multiple mergers as a part of the evolution.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: evolution - galaxies: high-redshift - galaxies: kinematics and dynamics - photon-dominated region PDR - quasars: individual: HXMM05 - submillimeter: ISM

Simbad objects: 27

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2019ApJ...871...85L and select 'bookmark this link' or equivalent in the popup menu


2019.10.23-13:32:38

© Université de Strasbourg/CNRS

    • Contact