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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We present mock optical images, broad-band and H$\alpha$ fluxes, and D4000spectral indices for 30,145 galaxies from the EAGLE hydrodynamical simulationat redshift $z=0.1$, modelling dust with the SKIRT Monte Carlo radiativetransfer code. The modelling includes a subgrid prescription for dustystar-forming regions, with both the subgrid obscuration of these regions andthe fraction of metals in diffuse interstellar dust calibrated againstfar-infrared fluxes of local galaxies. The predicted optical colours as afunction of stellar mass agree well with observation, with the SKIRT modelshowing marked improvement over a simple dust screen model. The orientationdependence of attenuation is weaker than observed because EAGLE galaxies aregenerally puffier than real galaxies, due to the pressure floor imposed on theinterstellar medium. The mock H$\alpha$ luminosity function agrees reasonablywell with the data, and we quantify the extent to which dust obscurationaffects observed H$\alpha$ fluxes. The distribution of D4000 break values isbimodal, as observed. In the simulation, 20$\%$ of galaxies deemed `passive'for the SKIRT model, i.e. exhibiting D4000 $> 1.8$, are classified `active'when ISM dust attenuation is not included. The fraction of galaxies withstellar mass greater than $10^{10}$ M$_\odot$ that are deemed passive isslightly smaller than observed, which is due to low levels of residual starformation in these simulated galaxies. Colour images, fluxes and spectra ofEAGLE galaxies are to be made available through the public EAGLE database.

Optical colours and spectral indices of $z=0.1$ EAGLE galaxies with 3D dust radiative transfer code SKIRT