SILCC VIII. The impact of far-ultraviolet radiation on star formation and the interstellar medium
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F25%3A00636190" target="_blank" >RIV/67985815:_____/25:00636190 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0367205" target="_blank" >https://hdl.handle.net/11104/0367205</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/mnras/staf792" target="_blank" >10.1093/mnras/staf792</a>
Alternative languages
Result language
angličtina
Original language name
SILCC VIII. The impact of far-ultraviolet radiation on star formation and the interstellar medium
Original language description
We present magnetohydrodynamic simulations of star formation in the multiphase interstellar medium (ISM) to quantify the impact of non-ionizing far-ultraviolet (FUV) radiation within the SILCC PROJECT simulation framework. Our study incorporates the radiative transfer of ionizing radiation and self-consistent modelling of variable FUV radiation from star clusters, advancing beyond previous studies using static or simplified FUV fields. This enables a more accurate capture of the dynamic interaction between radiation and the evolving ISM alongside other stellar feedback channels. The interstellar radiation field (ISRF) near young star clusters can reach G(0) approximate to 10(4) (in Habing units), far exceeding the solar neighbourhood value of G(0) = 1.7. Despite these high intensities, FUV radiation minimally impacts the integrated star formation rate compared to ionizing radiation, stellar winds, and supernovae. A slight reduction in star formation burstiness is linked to increased photoelectric (PE) heating efficiency by the variable FUV field. Dust near star-forming regions can be heated up to 60 K via the PE effect, with a broad temperature distribution. PE heating rates in variable FUV models exhibit higher peaks but lower averages than static ISRF models. Simulations under solar neighbourhood conditions without stellar winds or ionizing radiation but with supernovae yield unexpectedly high star formation rates of similar to 0.1 M-circle dot yr(-1) kpc(-2). Our analysis reveals increased cold neutral medium volume-filling factors (VFF) outside stellar clusters, reduced thermally unstable gas, and sharper warm-cold gas separation. The variable FUV field also promotes a cold diffuse gas phase with a molecular component, exhibiting a VFF of similar to 5-10 per cent.
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
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
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
Monthly Notices of the Royal Astronomical Society
ISSN
0035-8711
e-ISSN
1365-2966
Volume of the periodical
540
Issue of the periodical within the volume
2
Country of publishing house
US - UNITED STATES
Number of pages
29
Pages from-to
1462-1490
UT code for WoS article
001499896900001
EID of the result in the Scopus database
2-s2.0-105007280484