English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  On the evolution of the size of Lyman alpha haloes across cosmic time: no change in the circumgalactic gas distribution when probed by line emission

Runnholm, A., Hayes, M. J., Lin, Y.-H., Melinder, J., Scarlata, C., Adamo, A., et al. (2023). On the evolution of the size of Lyman alpha haloes across cosmic time: no change in the circumgalactic gas distribution when probed by line emission. Monthly Notices of the Royal Astronomical Society, 522(3), 4275-4293. doi:10.1093/mnras/stad1264.

Item is

Files

show Files
hide Files
:
On the evolution of the size of Lyman alpha haloes across cosmic time no change in the circumgalactic gas distribution when probed by line emission.pdf (Any fulltext), 3MB
 
File Permalink:
-
Name:
On the evolution of the size of Lyman alpha haloes across cosmic time no change in the circumgalactic gas distribution when probed by line emission.pdf
Description:
-
OA-Status:
Visibility:
Private
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Runnholm, Axel, Author
Hayes, Matthew J., Author
Lin, Yu-Heng, Author
Melinder, Jens, Author
Scarlata, Claudia, Author
Adamo, Angela, Author
Augustin, Ramona, Author
Bik, Arjan, Author
Blaizot, Jérémy, Author
Cannon, John M., Author
Cantalupo, Sebastiano, Author
Garel, Thibault, Author
Gronke, Max1, Author           
Herenz, Edmund C., Author
Leclercq, Floriane, Author
Östlin, Göran, Author
Peroux, Celine, Author
Rasekh, Armin, Author
Rutkowski, Michael J., Author
Verhamme, Anne, Author
Wisotzki, Lutz, Author more..
Affiliations:
1Multiphase Gas, MPI for Astrophysics, Max Planck Society, ou_3510275              

Content

show
hide
Free keywords: -
 Abstract: Lyman α (Lyα) is now routinely used as a tool for studying high-redshift galaxies, and its resonant nature means it can trace neutral hydrogen around star-forming galaxies. Integral field spectrograph measurements of high-redshift Lyα emitters indicate that significant extended Lyα halo emission is ubiquitous around such objects. We present a sample of redshift 0.23 to 0.31 galaxies observed with the Hubble Space Telescope selected to match the star formation properties of high-z samples while optimizing the observations for detection of low surface brightness Lyα emission. The Lyα escape fractions range between 0.7 and 37 per cent, and we detect extended Lyα emission around six out of seven targets. We find Lyα halo to UV scale length ratios around 6:1, which is marginally lower than high-redshift observations, and halo flux fractions between 60 and 85 per cent – consistent with high-redshift observations – when using comparable methods. However, our targets show additional extended stellar UV emission: we parametrize this with a new double exponential model. We find that this parametrization does not strongly affect the observed Lyα halo fractions. We find that deeper Hα data would be required to firmly determine the origin of Lyα halo emission; however, there are indications that Hα is more extended than the central FUV profile, potentially indicating conditions favourable for the escape of ionizing radiation. We discuss our results in the context of high-redshift galaxies, cosmological simulations, evolutionary studies of the circumgalactic medium in emission, and the emission of ionizing radiation.

Details

show
hide
Language(s): eng - English
 Dates: 2023-04-27
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1093/mnras/stad1264
 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: 522 (3) Sequence Number: - Start / End Page: 4275 - 4293 Identifier: ISSN: 1365-8711
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000024150