Herschel-ATLAS: The dust energy balance in the edge-on spiral galaxy UGC 4754

Baes, M., Fritz, J., Gadotti, D.A., Smith, Daniel, Dunne, L., da Cunha, E., Amblard, A., Auld, R., Bendo, G., Bonfield, D., Burgarella, D., Buttiglione, S., Cava, A., Clements, D., Cooray, A., Dariush, A., de Zotti, G., Dye, S., Eales, S., Frayer, D., Gonzalez-Nuevo, J., Herranz, D., Ibar, E., Ivison, R.J., Lagache, G., Leeuw, L., Lopez-Caniego, M., Jarvis, M.J., Maddox, S., Negrello, M., Michalowski, M., Pascale, E., Pohlen, M., Rigby, E., Rodighiero, G., Samui, S., Serjeant, S., Temi, P., Thompson, M.A., van der Werf, P., Verma, A. and Vlahakis, C. (2010) Herschel-ATLAS: The dust energy balance in the edge-on spiral galaxy UGC 4754. Astronomy and Astrophysics, 518: L39. ISSN 0004-6361

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We use Herschel PACS and SPIRE observations of the edge-on spiral galaxy UGC 4754, taken as part of the H-ATLAS SDP observations, to investigate the dust energy balance in this galaxy. We build detailed SKIRT radiative models based on SDSS and UKIDSS maps and use these models to predict the far-infrared emission. We find that our radiative transfer model underestimates the observed FIR emission by a factor of two to three. Similar discrepancies have been found for other edge-on spiral galaxies based on IRAS, ISO, and SCUBA data. Thanks to the good sampling of the SED at FIR wavelengths, we can rule out an underestimation of the FIR emissivity as the cause for this discrepancy. Instead we support highly obscured star formation that contributes little to the optical extinction as a more probable explanation.

Item Type	Article
Additional information	Original article can be found at: http://www.aanda.org/ Copyright The European Southern Observatory
Keywords	radiative transfer, dust, extinction
Date Deposited	15 May 2025 11:57
Last Modified	30 May 2025 23:41