English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Molecular gas properties on cloud scales across the local star-forming galaxy population

Sun, J., Leroy, A. K., Schinnerer, E., Hughes, A., Rosolowsky, E., Querejeta, M., et al. (2020). Molecular gas properties on cloud scales across the local star-forming galaxy population. The Astrophysical Journal Letters, 901(1): L8. doi:10.3847/2041-8213/abb3be.

Item is

Basic

show hide
Genre: Journal Article

Files

show Files
hide Files
:
Molecular gas properties on cloud scales across the local star-forming galaxy population.pdf (Any fulltext), 833KB
 
File Permalink:
-
Name:
Molecular gas properties on cloud scales across the local star-forming galaxy population.pdf
Description:
-
Visibility:
Private
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Sun, Jiayi, Author
Leroy, Adam K., Author
Schinnerer, Eva, Author
Hughes, Annie, Author
Rosolowsky, Erik, Author
Querejeta, Miguel, Author
Schruba, Andreas1, Author              
Liu, Daizhong, Author
Saito, Toshiki, Author
Herrera, Cinthya N., Author
Faesi, Christopher, Author
Usero, Antonio, Author
Pety, Jérôme, Author
Kruijssen, J. M. Diederik, Author
Ostriker, Eve C., Author
Bigiel, Frank, Author
Blanc, Guillermo A., Author
Bolatto, Alberto D., Author
Boquien, Médéric, Author
Chevance, Mélanie, Author
Dale, Daniel A., AuthorDeger, Sinan, AuthorEmsellem, Eric, AuthorGlover, Simon C. O., AuthorGrasha, Kathryn, AuthorGroves, Brent, AuthorHenshaw, Jonathan, AuthorJimenez-Donaire, Maria J., AuthorKim, Jenny J., AuthorKlessen, Ralf S., AuthorKreckel, Kathryn, AuthorLee, Janice C., AuthorMeidt, Sharon, AuthorSandstrom, Karin, AuthorSardone, Amy E., AuthorUtomo, Dyas, AuthorWilliams, Thomas G., Author more..
Affiliations:
1Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society, ou_159889              

Content

show
hide
Free keywords: -
 Abstract: Using the PHANGS–ALMA CO(2–1) survey, we characterize molecular gas properties on ~100 pc scales across 102,778 independent sightlines in 70 nearby galaxies. This yields the best synthetic view of molecular gas properties on cloud scales across the local star-forming galaxy population obtained to date. Consistent with previous studies, we observe a wide range of molecular gas surface densities (3.4 dex), velocity dispersions (1.7 dex), and turbulent pressures (6.5 dex) across the galaxies in our sample. Under simplifying assumptions about subresolution gas structure, the inferred virial parameters suggest that the kinetic energy of the molecular gas typically exceeds its self-gravitational binding energy at ~100 pc scales by a modest factor (1.3 on average). We find that the cloud-scale surface density, velocity dispersion, and turbulent pressure (1) increase toward the inner parts of galaxies, (2) are exceptionally high in the centers of barred galaxies (where the gas also appears less gravitationally bound), and (3) are moderately higher in spiral arms than in inter-arm regions. The galaxy-wide averages of these gas properties also correlate with the integrated stellar mass, star formation rate, and offset from the star-forming main sequence of the host galaxies. These correlations persist even when we exclude regions with extraordinary gas properties in galaxy centers, which contribute significantly to the inter-galaxy variations. Our results provide key empirical constraints on the physical link between molecular cloud populations and their galactic environment.

Details

show
hide
Language(s):
 Dates: 2020-09-18
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.3847/2041-8213/abb3be
Other: LOCALID: 3267947
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: The Astrophysical Journal Letters
  Other : Astrophys. J. Lett.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Chicago, IL : University of Chicago Press for the American Astronomical Society
Pages: - Volume / Issue: 901 (1) Sequence Number: L8 Start / End Page: - Identifier: ISSN: 2041-8205
CoNE: https://pure.mpg.de/cone/journals/resource/954922828215