English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  ALMA uncovers the [C ii] emission and warm dust continuum in a z = 8.31 Lyman break galaxy

Bakx, T. J. L. C., Tamura, Y., Hashimoto, T., Inoue, A. K., Lee, M. M., Mawatari, K., et al. (2020). ALMA uncovers the [C ii] emission and warm dust continuum in a z = 8.31 Lyman break galaxy. Monthly Notices of the Royal Astronomical Society, 493(3), 4294-4307. doi:10.1093/mnras/staa509.

Item is

Basic

show hide
Genre: Journal Article

Files

show Files
hide Files
:
ALMA uncovers the [C ii] emission and warm dust continuum in a z = 8.31 Lyman break galaxy.pdf (Any fulltext), 3MB
 
File Permalink:
-
Name:
ALMA uncovers the [C ii] emission and warm dust continuum in a z = 8.31 Lyman break galaxy.pdf
Description:
-
Visibility:
Private
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Bakx, Tom J L C, Author
Tamura, Yoichi, Author
Hashimoto, Takuya, Author
Inoue, Akio K, Author
Lee, Minju M.1, Author              
Mawatari, Ken, Author
Ota, Kazuaki, Author
Umehata, Hideki, Author
Zackrisson, Erik, Author
Hatsukade, Bunyo, Author
Kohno, Kotaro, Author
Matsuda, Yuichi, Author
Matsuo, Hiroshi, Author
Okamoto, Takashi, Author
Shibuya, Takatoshi, Author
Shimizu, Ikkoh, Author
Taniguchi, Yoshiaki, Author
Yoshida, Naoki, Author
Affiliations:
1Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society, ou_159889              

Content

show
hide
Free keywords: -
 Abstract: We report on the detection of the [C ii] 157.7 μm emission from the Lyman break galaxy (LBG) MACS0416_Y1 at z = 8.3113, by using the Atacama Large Millimeter/submillimeter Array (ALMA). The luminosity ratio of [O iii] 88 μm (from previous campaigns) to [C ii] is 9.3 ± 2.6, indicative of hard interstellar radiation fields and/or a low covering fraction of photodissociation regions. The emission of [C ii] is cospatial to the 850 μm dust emission (90 μm rest frame, from previous campaigns), however the peak [C ii] emission does not agree with the peak [O iii] emission, suggesting that the lines originate from different conditions in the interstellar medium. We fail to detect continuum emission at 1.5 mm (160 μm rest frame) down to 18 μJy (3σ). This non-detection places a strong limits on the dust spectrum, considering the 137 ± 26 μJy continuum emission at 850 μm. This suggests an unusually warm dust component (T > 80 K, 90 per cent confidence limit), and/or a steep dust-emissivity index (βdust > 2), compared to galaxy-wide dust emission found at lower redshifts (typically T ∼ 30–50 K, βdust ∼ 1–2). If such temperatures are common, this would reduce the required dust mass and relax the dust production problem at the highest redshifts. We therefore warn against the use of only single-wavelength information to derive physical properties, recommend a more thorough examination of dust temperatures in the early Universe, and stress the need for instrumentation that probes the peak of warm dust in the Epoch of Reionization.

Details

show
hide
Language(s):
 Dates: 2020-03-05
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1093/mnras/staa509
Other: LOCALID: 3237898
 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: 493 (3) Sequence Number: - Start / End Page: 4294 - 4307 Identifier: ISSN: 1365-8711
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000024150