English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We studied the effect of interstellar gas conditions on global galaxysimulations by considering three different models for the ISM. Our first modelincluded only radiative cooling down to 300 K, our second model added anadditional background heating term due to photoelectric heating, and our thirdmodel uses an isothermal equation of state with a temperature of 10^4 K and noexplicit heating or cooling. Two common prescriptions for star formation areimplemented in each case. The first is based on cosmological simulations with alow threshold for star formation but also a low efficiency. The second assumesstars form only in high density regions but with a higher efficiency. We alsoexplore the effects of including feedback from type II supernovae. We find thatthe different ISM types produce marked differences in the structure of the diskand temperature phases present in the gas, although inclusion of feedbacklargely dominates these effects. In particular, size of the star-forming clumpswas increased both by background heating and by enforcing an isothermal ISM. Wealso looked at the one dimensional profiles and found that a lognormal PDFprovides a good fit for all our simulations over several orders of magnitude indensity. Overall, despite noticeable structural differences, the star formationproperties in the disk are largely insensitive to ISM type and agree reasonablywell with observations.

The Effect of the Interstellar Model on Star Formation Properties in Galactic Disks