J/A+A/620/A112 Template SED of DustPedia galaxies (Bianchi+, 2018)
Fraction of bolometric luminosity absorbed by dust in DustPedia galaxies.
Bianchi S., De Vis P., Viaene S., Nersesian A., Mosenkov A.V.,
Xilouris E.M., Baes M., Casasola V., Cassara L.P., Clark C.J.R.,
Davies J.I., De Looze I., Dobbels W., Galametz M., Galliano F., Jones A.P.,
Lianou S., Madden S.C., Trcka A.
<Astron. Astrophys. 620, A112 (2018)>
=2018A&A...620A.112B 2018A&A...620A.112B (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, nearby ; Galaxies, IR ; Galaxies, photometry ; Models ;
Energy distributions
Keywords: dust, extinction - infrared: galaxies - galaxies: photometry -
galaxies: ISM - galaxies: evolution
Abstract:
We aim to study the fraction of stellar radiation absorbed by dust,
fabs, in 814 galaxies of different morphological types. The targets
constitute the vast majority (93%) of the DustPedia sample, including
almost all large (optical diameter larger than 1 arcmin), nearby
(v≤3000km/s) galaxies observed with the Herschel Space Observatory.
For each object, we modelled the spectral energy distribution from the
ultraviolet to the sub-millimetre using the dedicated,
aperture-matched DustPedia photometry and the Code Investigating
GALaxy Evolution (CIGALE). The value of fabs was obtained from the
total luminosity emitted by dust and from the bolometric luminosity,
which are estimated by the fit.
On average, 19% of the stellar radiation is absorbed by dust in
DustPedia galaxies. The fraction rises to 25% if only late-type
galaxies are considered. The dependence of fabs on morphology, showing
a peak for Sb-Sc galaxies, is weak; it reflects a stronger, yet broad,
positive correlation with the bolometric luminosity, which is
identified for late-type, disk-dominated, high-specific-star-formation
rate, gas-rich objects. We find no variation of fabs with inclination,
at odds with radiative transfer models of edge-on galaxies. These
results call for a self-consistent modelling of the evolution of the
dust mass and geometry along the build-up of the stellar content. We
also provide template spectral energy distributions in bins of
morphology and luminosity and study the variation of fabs with stellar
mass and specific star-formation rate. We confirm that the local
Universe is missing the high fabs, luminous and actively star-forming
objects necessary to explain the energy budget in observations of the
extragalactic background light.
Description:
Average and median Spectral Energy Distributions (SED) templates
(lambda*Flambda) obtained from SED modelled to the photometry of
each analysed galaxy. The templates are derived for various morphology
bins and luminosity bins after normalizing the SED of each galaxy by
its bolometric luminosity (for lambda>0.0912 micrometers) and removing
the 10 per cent of the sample with the most deviant SEDs from the
average. The bins in morphology are given as intervals in the Hubble
stage parameter T (for Ellipticals, S0, Sa-Sab, Sb-Sc, Scd-Sdm, Sm-Ir
and all Late Type Galaxies). The bins in bolometric luminosity are
given in intervals of log10(L/Lsun); these templates are derived using
only galaxies of types later than Sb (T>2.5). The median statistics is
computed as in Gott et al.. 2001ApJ...549....1G 2001ApJ...549....1G. All SED files have
the same column description.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
e.dat 142 2881 Template from 64 gals with -5.0≤T←3.5
s0.dat 142 2881 Template from 177 gals with -3.5≤T< 0.5
sa-sab.dat 142 2881 Template from 81 gals with 0.5≤T< 2.5
sb-sc.dat 142 2881 Template from 172 gals with 2.5≤T< 5.5
scd-sdm.dat 142 2881 Template from 146 gals with 5.5≤T< 8.5
l1.dat 142 2881 Template from 26 gals with
7.5≤log10(L/Lsun)<8.5
l2.dat 142 2881 Template from 94 gals with
8.5≤log10(L/Lsun)<9.5
l3.dat 142 2881 Template from 196 gals with
9.5≤log10(L/Lsun)<10.5
l4.dat 142 2881 Template from 86 gals with
10.5≤log10(L/Lsun)<11.5
ltgs.dat 142 2881 Template from 491 gals with 0.5≤T<10.0
sm-ir.dat 142 2881 Template from 93 gals with 8.5≤T<10.0
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See also:
J/A+A/609/A37 : 875 nearby galaxies multiwavelength photometry (Clark+, 2018)
J/A+A/622/A132 : Dust emission profiles of DustPedia galaxies (Mosenkov+, 2019)
J/A+A/623/A5 : DustPedia metallicities and HI masses (De Vis+, 2019)
J/A+A/624/A80 : DustPedia SED fitting results (Nersesian+, 2019)
J/A+A/649/A18 : Nearby galaxy perspective on dust evolution (Galliano+, 2021)
J/A+A/699/A346 : Gas and dust in DustPedia galaxies (Salvestrini+, 2025)
Byte-by-byte Description of file: e.dat l*.dat s*.dat
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Bytes Format Units Label Explanations
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1- 22 F22.17 um lambda Wavelength in micrometers
24- 46 E23.15 --- mean Mean SED (lambda*Flambda)
48- 70 E23.15 --- 2sigma-mean Half of the 95% confidence range for the
mean SED (i.e. 2x standard deviation of
the mean)
72- 94 E23.15 --- median Median SED
96-118 E23.15 --- b_median Lower boundary of the 95% confidence range
for the median SED
120-142 E23.15 --- B_median Upper boundary of the 95% confidence range
for the median SED
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Acknowledgements:
Simone Bianchi, simone.bianchi(at)inaf.it
(End) Patricia Vannier [CDS] 29-Dec-2025