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- aggregation classification "A1".
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- aggregation date "2012".
- aggregation format "application/pdf".
- aggregation hasFormat 2113603.bibtex.
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- aggregation isPartOf urn:issn:0035-8711.
- aggregation language "eng".
- aggregation rights "I have transferred the copyright for this publication to the publisher".
- aggregation subject "Physics and Astronomy".
- aggregation title "Panchromatic radiative transfer modelling of stars and dust in the Sombrero galaxy".
- aggregation abstract "We present a detailed study of the dust energy balance in the Sombrero galaxy M104. From a full radiative transfer analysis, including scattering, absorption and thermal re-emission, we construct models that can reproduce images at optical/near-infrared (near-IR) wavelengths, the observed stellar spectral energy distribution and the minor axis extinction profiles in the V and R-C band. A standard model, which contains only an old stellar population to heat the dust, underestimates the observations of dust emission at IR wavelengths by a factor of similar to 3. Supplementing this basic model with a young stellar component of low star formation activity in both the inner disc (star formation rate, SFR similar to 0.21 M-circle dot yr(-1)) and dust ring (SFR similar to 0.05 M-circle dot yr(-1)), we are capable of solving the discrepancy in the dust energy budget of the Sombrero galaxy at wavelengths shortwards of 100 mu m. To account for the increased far-IR/submm emission beyond 100 mu m, we propose an additional dust component distributed in quiescent clumps. This model with a clumpy dust structure predicts three-quarters of the total dust content (similar to 2.8 x 10(7) M-circle dot) to reside in compact dust clouds with no associated embedded sources. Although the assumption of a clumpy dust structure in the Sombrero galaxy is supported by high-resolution optical data, we cannot rule out the possibility that dust grains with a higher dust emissivity account for part of the discrepancy in the energy budget at submm wavelengths.".
- aggregation authorList BK487524.
- aggregation endPage "903".
- aggregation issue "1".
- aggregation startPage "895".
- aggregation volume "419".
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