New-generation dust emission templates for star-forming galaxies
  The IR emission of dust heated by stars provides critical information for
galaxy evolution studies. Unfortunately, observations are often limited to the
MIR, making templates a necessity. Previously published templates were based on
small samples of luminous galaxies, not necessarily representative of normal
star-forming galaxies. We construct new dust templates, including
instrument-specific relations and software tools that facilitate the estimation
of the TIR luminosity and SFR based on one or several fluxes up to z=4. For the
first time the templates include a dependence on both TIR luminosity and the
sSFR, thereby increasing their reliability and utility. We also provide
formulae for calculating TIR luminosities and SFR from JWST F2100W observations
at 0<z<2. Our templates are based on 2584 normal star-forming galaxies spanning
a wide range of stellar mass and sSFR, including sSFRs typical at higher
redshifts. IR spectra and properties are obtained using CIGALE and the Draine &
Li (2007) dust models. The photometry from the GALEX-SDSS-WISE Legacy Catalog
is supplemented with 2MASS and H-ATLAS, from FUV to 500 microns. The shape of
the dust spectrum varies with TIR luminosity, but also independently with sSFR.
Remarkably precise estimates of the dust luminosity are possible with a single
band over the rest-frame 12-17 and 55-130 microns. We validate single-band
estimates on diverse populations, including local LIRGs, and find no
significant systematic errors. Using two or more bands simultaneously yields
unbiased estimation of the TIR luminosity even of star-forming dwarfs. We
obtain fresh insights regarding the interplay between monochromatic IR
luminosities, spectral shapes and physical properties, and construct new
templates and estimators of the dust luminosity and SFR. We provide software
for generating templates and estimating these quantities based on 1-4 bands up
to z=4.
