J.L. Wardlow
An ALMA survey of CO in submillimetre galaxies: companions, triggering, and the environment in blended sources
Wardlow, J.L.; Simpson, J.M.; Smail, Ian; Swinbank, A.M.; Blain, A.W.; Brandt, W.N.; Chapman, S.C.; Chen, Chian-Chou; Cooke, E.A.; Dannerbauer, H.; Gullberg, B.; Hodge, J.A.; Ivison, R.J.; Knudsen, K.K.; Scott, Douglas; Thomson, A.P.; Weiß, A.; van der Werf, P.P.
Authors
J.M. Simpson
Professor Ian Smail ian.smail@durham.ac.uk
Emeritus Professor
Professor Mark Swinbank a.m.swinbank@durham.ac.uk
Professor
A.W. Blain
W.N. Brandt
S.C. Chapman
Chian-Chou Chen
E.A. Cooke
H. Dannerbauer
B. Gullberg
J.A. Hodge
R.J. Ivison
K.K. Knudsen
Douglas Scott
Dr Alasdair Thomson alasdair.thomson@durham.ac.uk
Academic Visitor
A. Weiß
P.P. van der Werf
Abstract
We present ALMA observations of the mid-J 12CO emission from six single-dish selected 870-μm sources in the Extended Chandra Deep Field-South and UKIDSS Ultra-Deep Survey fields. These six single-dish submillimetre sources were selected based on previous ALMA continuum observations, which showed that each comprised a blend of emission from two or more individual submillimetre galaxies (SMGs), separated on 5–10 arcsec scales. The six single-dish submillimetre sources targeted correspond to a total of 14 individual SMGs, of which seven have previously measured robust optical/near-infrared spectroscopic redshifts, which were used to tune our ALMA observations. We detect CO(3–2) or CO(4–3) at z = 2.3–3.7 in 7 of the 14 SMGs, and in addition serendipitously detect line emission from three gas-rich companion galaxies, as well as identify four new 3.3 mm selected continuum sources in the six fields. Joint analysis of our CO spectroscopy and existing data suggests that 64(±18)percent of the SMGs in blended submillimetre sources are unlikely to be physically associated. However, three of the SMG fields (50 per cent) contain new, serendipitously detected CO-emitting (but submillimetre-faint) sources at similar redshifts to the 870 μm selected SMGs we targeted. These data suggest that the SMGs inhabit overdense regions, but that these are not sufficiently overdense on ∼100 kpc scales to influence the source blending given the short lifetimes of SMGs. We find that 21±12percent of SMGs have spatially distinct and kinematically close companion galaxies (∼8–150 kpc and ≲ 300 km s−1), which may have enhanced their star formation via gravitational interactions.
Citation
Wardlow, J., Simpson, J., Smail, I., Swinbank, A., Blain, A., Brandt, W., …van der Werf, P. (2018). An ALMA survey of CO in submillimetre galaxies: companions, triggering, and the environment in blended sources. Monthly Notices of the Royal Astronomical Society, 479(3), 3879-3891. https://doi.org/10.1093/mnras/sty1526
Journal Article Type | Article |
---|---|
Acceptance Date | Jun 6, 2018 |
Online Publication Date | Jun 14, 2018 |
Publication Date | Sep 21, 2018 |
Deposit Date | Aug 23, 2018 |
Publicly Available Date | Aug 23, 2018 |
Journal | Monthly Notices of the Royal Astronomical Society |
Print ISSN | 0035-8711 |
Electronic ISSN | 1365-2966 |
Publisher | Royal Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 479 |
Issue | 3 |
Pages | 3879-3891 |
DOI | https://doi.org/10.1093/mnras/sty1526 |
Files
Published Journal Article
(1.6 Mb)
PDF
Copyright Statement
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2018 Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
You might also like
3D tomography of the giant Lyα nebulae of z ≈ 3–5 radio-loud AGN
(2023)
Journal Article
Downloadable Citations
About Durham Research Online (DRO)
Administrator e-mail: dro.admin@durham.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2024
Advanced Search