English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse
  1. View item / 
  2. Item Summary

Item

ITEM ACTIONSEXPORT
Add to Basket
  Local TagsRelease HistoryDetailsSummary

Released
Journal Article

Strong Far-ultraviolet Fields Drive the [C II]/Far-infrared Deficit in z ∼ 3 Dusty, Star-forming Galaxies

MPS-Authors

Rybak,  Matus
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Calistro Rivera,  G.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Hodge,  J. A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Smail,  Ian
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Walter,  F.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

van der Werf,  P.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

da Cunha,  E.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Chen,  Chian-Chou
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Dannerbauer,  H.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Ivison,  R. J.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Karim,  A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Simpson,  J. M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Swinbank,  A. M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Wardlow,  J. L.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

External Resource

https://ui.adsabs.harvard.edu/abs/2019ApJ...876..112R
(Any fulltext)

Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Rybak, M., Calistro Rivera, G., Hodge, J. A., Smail, I., Walter, F., van der Werf, P., et al. (2019). Strong Far-ultraviolet Fields Drive the [C II]/Far-infrared Deficit in z ∼ 3 Dusty, Star-forming Galaxies. The Astrophysical Journal, 876.


Cite as: https://hdl.handle.net/21.11116/0000-0005-CFE0-5
Abstract
We present 0.″15 (1 kpc) resolution ALMA observations of the [C II] 157.74 μm line and rest-frame 160 μm continuum emission in two z ∼ 3 dusty, star-forming galaxies—ALESS 49.1 and ALESS 57.1, combined with resolved CO (3-2) observations. In both sources, the [C II] surface brightness distribution is dominated by a compact core ≤1 kpc in radius, a factor of 2-3 smaller than the extent of the CO (3-2) emission. In ALESS 49.1, we find an additional extended (8 kpc radius), low surface brightness [C II] component. Based on an analysis of mock ALMA observations, the [C II] and 160 μm continuum surface brightness distributions are inconsistent with a single-Gaussian surface brightness distribution with the same size as the CO (3-2) emission. The [C II] rotation curves flatten at ≃2 kpc radius, suggesting that the kinematics of the central regions are dominated by a baryonic disk. Both galaxies exhibit a strong [C II]/far-IR (FIR) deficit on 1 kpc scales, with FIR surface brightness to [C II]/FIR slope steeper than in local star- forming galaxies. A comparison of the [C II]/CO (3-2) observations with photodissociation region models suggests a strong far-UV (FUV) radiation field (G 0 ∼ 104) and high gas density (n(H) ∼ 104-105 cm−3) in the central regions of ALESS 49.1 and ALESS 57.1. The most direct interpretation of the pronounced [C II]/FIR deficit is a thermal saturation of the C+ fine-structure levels at temperatures ≥500 K, driven by the strong FUV field.