Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/33220
DC Field | Value | Language |
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dc.contributor.author | BIANCHI, Simone | en_US |
dc.contributor.author | CASASOLA, VIVIANA | en_US |
dc.contributor.author | CORBELLI, Edvige | en_US |
dc.contributor.author | Galliano, Frédéric | en_US |
dc.contributor.author | MAGRINI, Laura | en_US |
dc.contributor.author | Nersesian, Angelos | en_US |
dc.contributor.author | SALVESTRINI, Francesco | en_US |
dc.contributor.author | Baes, Maarten | en_US |
dc.contributor.author | CASSARA, Letizia Pasqua | en_US |
dc.contributor.author | Clark, Christopher J. R. | en_US |
dc.contributor.author | De Looze, Ilse | en_US |
dc.contributor.author | Jones, Anthony P. | en_US |
dc.contributor.author | Madden, Suzanne C. | en_US |
dc.contributor.author | Mosenkov, Aleksandr | en_US |
dc.contributor.author | Ysard, Nathalie | en_US |
dc.date.accessioned | 2023-02-07T16:29:22Z | - |
dc.date.available | 2023-02-07T16:29:22Z | - |
dc.date.issued | 2022 | en_US |
dc.identifier.issn | 0004-6361 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/33220 | - |
dc.description.abstract | Context. The far-infrared (FIR) and sub-millimeter (submm) emissivity, ϵ<SUB>ν</SUB>, of the Milky Way (MW) cirrus is an important benchmark for dust grain models. Dust masses in other galaxies are generally derived from the FIR/submm using the emission properties of these MW-calibrated models. <BR /> Aims: We seek to derive the FIR/submm ϵ<SUB>ν</SUB> in nine nearby spiral galaxies to check its compatibility with MW cirrus measurements. <BR /> Methods: We obtained values of ϵ<SUB>ν</SUB> at 70-500 μm, using maps of dust emission from the Herschel satellite and of gas surface density from the THINGS and HERACLES surveys on a scale generally corresponding to 440 pc. We studied the variation of ϵ<SUB>ν</SUB> with the surface brightness ratio I<SUB>ν</SUB>(250 μm)/I<SUB>ν</SUB>(500 μm), a proxy for the intensity of the interstellar radiation field heating the dust. <BR /> Results: We find that the average value of ϵ<SUB>ν</SUB> agrees with MW estimates for pixels sharing the same color as the cirrus, namely, for I<SUB>ν</SUB>(250 μm)/I<SUB>ν</SUB>(500 μm)=4.5. For I<SUB>ν</SUB>(250 μm)/I<SUB>ν</SUB>(500 μm)> 5, the measured emissivity is instead up to a factor ∼2 lower than predicted from MW dust models heated by stronger radiation fields. Regions with higher I<SUB>ν</SUB>(250 μm)/I<SUB>ν</SUB>(500 μm) are preferentially closer to the galactic center and have a higher overall (stellar+gas) surface density and molecular fraction. The results do not depend strongly on the adopted CO-to-molecular conversion factor and do not appear to be affected by the mixing of heating conditions. <BR /> Conclusions: Our results confirm the validity of MW dust models at low density, but are at odds with predictions for grain evolution in higher density environments. If the lower-than-expected ϵ<SUB>ν</SUB> at high I<SUB>ν</SUB>(250 μm)/I<SUB>ν</SUB>(500 μm) is the result of intrinsic variations in the dust properties, it would imply an underestimation of the dust mass surface density of up to a factor ∼2 when using current dust models. <P />This work makes use of the DustPedia database. DustPedia is a collaborative focused research project supported by the European Union under the Seventh Framework Programme (2007-2013) call (proposal no. 606824, P.I. J. I. Davies). The database is publicly available at <A href="http://dustpedia.astro.noa.gr">http://dustpedia.astro.noa.gr</A>. | en_US |
dc.language.iso | eng | en_US |
dc.title | Dust emissivity in resolved spiral galaxies | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1051/0004-6361/202243930 | en_US |
dc.identifier.scopus | 2-s2.0-85141234619 | en_US |
dc.identifier.url | https://www.aanda.org/articles/aa/full_html/2022/08/aa43930-22/aa43930-22.html | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 664 | en_US |
dc.relation.firstpage | A187 | en_US |
dc.type.referee | REF_1 | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | ASTRONOMY & ASTROPHYSICS | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2022A&A...664A.187B | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.grantfulltext | open | - |
item.languageiso639-1 | en | - |
item.fulltext | With Fulltext | - |
item.openairetype | Article | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.cerifentitytype | Publications | - |
crisitem.journal.journalissn | 0004-6361 | - |
crisitem.journal.ance | E016240 | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.dept | IRA Bologna | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.dept | IASF Milano | - |
crisitem.author.orcid | 0000-0002-9384-846X | - |
crisitem.author.orcid | 0000-0002-3879-6038 | - |
crisitem.author.orcid | 0000-0002-5788-2628 | - |
crisitem.author.orcid | 0000-0003-4486-6802 | - |
crisitem.author.orcid | 0000-0003-4751-7421 | - |
crisitem.author.orcid | 0000-0001-5760-089X | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
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aa43930-22.pdf | Pdf editoriale | 4.74 MB | Adobe PDF | View/Open |
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