SILCC IX. The multiphase interstellar medium at low metallicity
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F25%3A00640801" target="_blank" >RIV/67985815:_____/25:00640801 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0371172" target="_blank" >https://hdl.handle.net/11104/0371172</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/mnras/staf1713" target="_blank" >10.1093/mnras/staf1713</a>
Alternative languages
Result language
angličtina
Original language name
SILCC IX. The multiphase interstellar medium at low metallicity
Original language description
The gas-phase metallicity affects heating and cooling processes in the star-forming galactic interstellar medium (ISM) as well as ionizing luminosities, wind strengths, and lifetimes of massive stars. To investigate its impact, we conduct magnetohydrodynamic simulations of the ISM using the FLASH code as part of the SILCC project. The simulations assume a gas surface density of 10 M-circle dot pc(-2) and span metallicities from 1/50 to 1 Z(circle dot). We include non-equilibrium thermochemistry, a space-and time-variable far-UV background and cosmic ray ionization rate, metal-dependent stellar tracks, the formation of H II regions, stellar winds, type II supernovae, and cosmic ray injection and transport. With the metallicity decreasing over the investigated range, the star formation rate decreases by more than a factor of 10, the mass fraction of cold gas decreases from 60 percent to 2.3 percent, while the volume filling fraction of the warm gas increases from 20 per cent to 80 per cent. Furthermore, the fraction of H-2 in the densest regions drops by a factor of 4, and the dense ISM fragments into approximately five times fewer structures at the lowest metallicity. Outflow mass loading factors remain largely unchanged, with values close to unity, except for a significant decline at the lowest metallicity. Including the major processes that regulate ISM properties, this study highlights the strong impact of gas phase metallicity on the star-forming ISM.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
<a href="/en/project/LUC24023" target="_blank" >LUC24023: Formation of carbon molecules and dust in astrophysical environments</a><br>
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
543
Issue of the periodical within the volume
4
Country of publishing house
US - UNITED STATES
Number of pages
26
Pages from-to
4286-4311
UT code for WoS article
001600682600001
EID of the result in the Scopus database
2-s2.0-105019747971