The Herschel-ATLAS: The dust energy balance in the edge-on spiral galaxy UGC 4754 - Astrophysics > Cosmology and Nongalactic AstrophysicsReportar como inadecuado




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Abstract: We use Herschel PACS and SPIRE observations of the edge-on spiral galaxy UGC4754, taken as part of the H-ATLAS SDP observations, to investigate the dustenergy balance in this galaxy. We build detailed SKIRT radiative models basedon SDSS and UKIDSS maps and use these models to predict the far-infraredemission. We find that our radiative transfer model underestimates the observedFIR emission by a factor of two to three. Similar discrepancies have been foundfor other edge-on spiral galaxies based on IRAS, ISO, and SCUBA data. Thanks tothe good sampling of the SED at FIR wavelengths, we can rule out anunderestimation of the FIR emissivity as the cause for this discrepancy.Instead we support highly obscured star formation that contributes little tothe optical extinction as a more probable explanation.



Autor: M. Baes, J. Fritz, D. A. Gadotti, D. J. B. Smith, L. Dunne, E. da Cunha, A. Amblard, R. Auld, G. J. Bendo, D. Bonfield, D. Burgar

Fuente: https://arxiv.org/







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