From giant clumps to clouds - III. The connection between star formation and turbulence in the ISM

↓ Direkt till sidans innehåll
↓ Direkt till sidans sekundära innehåll (sidomenyn)

Search: onr:"swepub:oai:research.chalmers.se:1bb81cbf-9991-4a4b-9dac-0576855bb1b1" > From giant clumps t...

1 of 1
Previous record
Next record
To hitlist

Details
MARC

Ejdetjärn, TimmyStockholms universitet,Stockholm University,Lund University,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC),Lund Observatory, Sweden (author)

From giant clumps to clouds - III. The connection between star formation and turbulence in the ISM

Article/chapterEnglish2022

Publisher, publication year, extent ...

2022-05-24
Oxford University Press (OUP),2022
electronicrdacarrier

Numbers

LIBRIS-ID:oai:research.chalmers.se:1bb81cbf-9991-4a4b-9dac-0576855bb1b1
https://doi.org/10.1093/mnras/stac1414DOI
https://research.chalmers.se/publication/530896URI
https://lup.lub.lu.se/record/9f34d3cf-b591-4773-bee2-faa3170634b3URI
https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-207085URI

Supplementary language notes

Language:English
Summary in:English

Part of subdatabase

SwePubSwePub

Classification

Subject category:art swepub-publicationtype
Subject category:ref swepub-contenttype

Notes

Supersonic gas turbulence is a ubiquitous property of the interstellar medium. The level of turbulence, quantified by the gas velocity dispersion (sigma(g)), is observed to increase with the star formation rate (SFR) of a galaxy, but it is yet not established whether this trend is driven by stellar feedback or gravitational instabilities. In this work, we carry out hydrodynamical simulations of entire disc galaxies, with different gas fractions, to understand the origins of the SFR-sigma(g) relation. We show that disc galaxies reach the same levels of turbulence regardless of the presence of stellar feedback processes, and argue that this is an outcome of the way disc galaxies regulate their gravitational stability. The simulations match the SFR-sigma(g) relation up to SFRs of the order of tens of M-circle dot yr(-1) and sigma(g) similar to 50 km s(-1) in neutral hydrogen and molecular gas, but fail to reach the very large values (> 100 km s(-1)) reported in the literature for rapidly star-forming galaxies. We demonstrate that such high values of sigma(g) can be explained by ( 1) insufficient beam smearing corrections in observations and (2) stellar feedback being coupled to the ionized gas phase traced by recombination lines. Given that the observed SFR-sigma(g) relation is composed of highly heterogeneous data, with sigma(g) at high SFRs almost exclusively being derived from H alpha observations of high-redshift galaxies with complex morphologies, we caution against analytical models that attempt to explain the SFR-sigma(g) relation without accounting for these effects.

Subject headings and genre

NATURVETENSKAP Fysik Astronomi, astrofysik och kosmologi hsv//swe
NATURAL SCIENCES Physical Sciences Astronomy, Astrophysics and Cosmology hsv//eng
NATURVETENSKAP Kemi Annan kemi hsv//swe
NATURAL SCIENCES Chemical Sciences Other Chemistry Topics hsv//eng
TEKNIK OCH TEKNOLOGIER Maskinteknik Strömningsmekanik och akustik hsv//swe
ENGINEERING AND TECHNOLOGY Mechanical Engineering Fluid Mechanics and Acoustics hsv//eng
ISM: evolution
ISM: kinematics and dynamics
methods: numerical
galaxies: star formation
turbulence
Galaxies: star formation
ISM: evolution
ISM: kinematics and dynamics
Methods: numerical
Turbulence

Added entries (persons, corporate bodies, meetings, titles ...)

Agertz, OscarLund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science(Swepub:lu)os6277ag (author)
Östlin, GöranStockholms universitet,Stockholm University,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)ostlin (author)
Renaud, FlorentLund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science(Swepub:lu)fl7084re (author)
Romeo, Alessandro,1961Chalmers University of Technology(Swepub:cth)romeo (author)
Stockholm UniversityLund University (creator_code:org_t)

Related titles

In:Monthly Notices of the Royal Astronomical Society: Oxford University Press (OUP)514:1, s. 480-4960035-87111365-2966

Internet link

Find in a library

Monthly Notices of the Royal Astronomical Society (Search for host publication in LIBRIS)

To the university's database

1 of 1
Previous record
Next record
To hitlist

Find more in SwePub

By the author/editor: Ejdetjärn, Timmy; Agertz, Oscar; Östlin, Göran; Renaud, Florent; Romeo, Alessandr ...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Astronomy Astrop ...

NATURAL SCIENCES: NATURAL SCIENCES; and Chemical Science ...; and Other Chemistry ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...; and Fluid Mechanics ...

Articles in the publication: Monthly Notices ...

By the university: Chalmers University of Technology; Lund University; Stockholm University

Search outside SwePub

Extend your search to:: Google; Google Book Search; Google Scholar

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

LIBRIS.kb.se