Increased Molecular Gas Velocity Dispersion and Star Formation Efficiency in Barred Galaxy Centres
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A90106%2F25%3A00646357" target="_blank" >RIV/67985815:90106/25:00646357 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.3847/1538-3881/ae0f8f" target="_blank" >https://doi.org/10.3847/1538-3881/ae0f8f</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3847/1538-3881/ae0f8f" target="_blank" >10.3847/1538-3881/ae0f8f</a>
Alternative languages
Result language
angličtina
Original language name
Increased Molecular Gas Velocity Dispersion and Star Formation Efficiency in Barred Galaxy Centres
Original language description
Work by the Physics at High Angular resolution in Nearby GalaxieS (PHANGS) collaboration found higher molecular gas surface densities and velocity dispersions in the centers of barred galaxies compared to unbarred galaxies. We explore central molecular gas using published high resolution (150 pc) measurements of CO(2-1) from the PHANGS-ALMA survey and a new velocity dispersion-dependent prescription for the CO-to-H2 conversion factor alpha CO. Comparisons of the molecular gas surface density, velocity dispersion, star formation rate, and depletion time reveal that these quantities are different in the centers of barred and unbarred galaxies. Gas depletion times are found to be shorter in barred galaxy centers. Even when we control for the presence of an active galactic nucleus, the velocity dispersion and depletion time are found to be statistically different between barred and unbarred galaxy centers. The higher velocity dispersion suggests extra noncircular motions, possibly due to the inflow of gas along the bar, that are not constant but must increase as the star formation rate increases.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
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Continuities
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Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astronomical Journal
ISSN
0004-6256
e-ISSN
1538-3881
Volume of the periodical
170
Issue of the periodical within the volume
6
Country of publishing house
US - UNITED STATES
Number of pages
11
Pages from-to
314
UT code for WoS article
001612136800001
EID of the result in the Scopus database
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