English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  SHARP - VI. Evidence for CO (1-0) molecular gas extended on kpc-scales in AGN star-forming galaxies at high redshift

Spingola, C., McKean, J. P., Vegetti, S., Powell, D., Auger, M. W., Koopmans, L. V. E., et al. (2020). SHARP - VI. Evidence for CO (1-0) molecular gas extended on kpc-scales in AGN star-forming galaxies at high redshift. Monthly Notices of the Royal Astronomical Society, 495(2), 2387-2407. doi:10.1093/mnras/staa1342.

Item is

Basic

show hide
Genre: Journal Article

Files

show Files
hide Files
:
SHARP - VI. Evidence for CO (1-0) molecular gas extended on kpc-scales in AGN star-forming galaxies at high redshift.pdf (Any fulltext), 9MB
 
File Permalink:
-
Name:
SHARP - VI. Evidence for CO (1-0) molecular gas extended on kpc-scales in AGN star-forming galaxies at high redshift.pdf
Description:
-
Visibility:
Private
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Spingola, C., Author
McKean, J. P., Author
Vegetti, S.1, Author              
Powell, D.1, Author              
Auger, M. W., Author
Koopmans, L. V. E., Author
Fassnacht, C. D., Author
Lagattuta, D. J., Author
Rizzo, F.1, Author              
Stacey, H. R., Author
Sweijen, F., Author
Affiliations:
1Computational Structure Formation, MPI for Astrophysics, Max Planck Society, ou_2205642              

Content

show
hide
Free keywords: -
 Abstract: We present a study of the stellar host galaxy, CO (1–0) molecular gas distribution and AGN emission on 50–500 pc-scales of the gravitationally lensed dust-obscured AGN MG J0751+2716 and JVAS B1938+666 at redshifts 3.200 and 2.059, respectively. By correcting for the lensing distortion using a grid-based lens modelling technique, we spatially locate the different emitting regions in the source plane for the first time. Both AGN host galaxies have 300–500 pc-scale size and surface brightness consistent with a bulge/pseudo-bulge, and 2 kpc-scale AGN radio jets that are embedded in extended molecular gas reservoirs that are 5–20 kpc in size. The CO (1–0) velocity fields show structures possibly associated with discs (elongated velocity gradients) and interacting objects (off-axis velocity components). There is evidence for a decrement in the CO (1–0) surface brightness at the location of the host galaxy, which may indicate radiative feedback from the AGN, or offset star formation. We find CO–H2 conversion factors of around αCO = 1.5 ± 0.5 (K km s−1 pc2)−1, molecular gas masses of >3 × 1010 M, dynamical masses of ∼1011 M, and gas fractions of around 60 per cent. The intrinsic CO line luminosities are comparable to those of unobscured AGN and dusty star-forming galaxies at similar redshifts, but the infrared luminosities are lower, suggesting that the targets are less efficient at forming stars. Therefore, they may belong to the AGN feedback phase predicted by galaxy formation models, because they are not efficiently forming stars considering their large amount of molecular gas.

Details

show
hide
Language(s):
 Dates: 2020-05-16
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1093/mnras/staa1342
Other: LOCALID: 3253689
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Monthly Notices of the Royal Astronomical Society
  Other : Mon. Not. R. Astron. Soc.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Oxford : Oxford University Press
Pages: - Volume / Issue: 495 (2) Sequence Number: - Start / End Page: 2387 - 2407 Identifier: ISSN: 1365-8711
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000024150