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

The dust in nearby galaxies absorbs a fraction of theUV-optical-near-infrared radiation produced by stars. This energy isconsequently re-emitted in the infrared. We investigate the portion of thestellar radiation absorbed by spiral galaxies from the HRS by modelling theirUV-to-submillimetre spectral energy distributions. Our models provide anattenuated and intrinsic SED from which we find that on average 32 % of allstarlight is absorbed by dust. We define the UV heating fraction as thepercentage of dust luminosity that comes from absorbed UV photons and find thatthis is 56 %, on average. This percentage varies with morphological type, withlater types having significantly higher UV heating fractions. We find a strongcorrelation between the UV heating fraction and specific star formation rateand provide a power-law fit. Our models allow us to revisit the IRX-AFUVrelations, and derive these quantities directly within a self-consistentframework. We calibrate this relation for different bins of NUV-r colour andprovide simple relations to relate these parameters. We investigated therobustness of our method and we conclude that the derived parameters arereliable within the uncertainties which are inherent to the adopted SED model.This calls for a deeper investigation on how well extinction and attenuationcan be determined through panchromatic SED modelling.

The bolometric and UV attenuation in normal spiral galaxies of the Herschel Reference Survey