Publication:
Mapping far-IR emission from the central kiloparsec of NGC 1097

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dc.contributor.authorSandstrom, K
dc.contributor.authorKrause, O
dc.contributor.authorLinz, H
dc.contributor.authorSchinnerer, E
dc.contributor.authorDumas, G
dc.contributor.authorMeidt, S
dc.contributor.authorRix, H
dc.contributor.authorSauvage, M
dc.contributor.authorWalter, F
dc.contributor.authorKennicutt, R
dc.contributor.authorCalzetti, D
dc.contributor.departmentUniversity of Massachusetts - Amherst
dc.date2023-09-23T03:21:43.000
dc.date.accessioned2024-04-26T08:30:45Z
dc.date.available2024-04-26T08:30:45Z
dc.date.issued2010-01-01
dc.descriptionThis is the pre-published version harvested from ArXiv. The published version is located at http://www.aanda.org/index.php?option=com_article&access=standard&Itemid=129&url=/articles/aa/pdf/2010/10/aa14583-10.pdf
dc.description.abstractUsing photometry of NGC 1097 from the Herschel PACS (Photodetector Array Camera and Spectrometer) instrument, we study the resolved properties of thermal dust continuum emission from a circumnuclear starburst ring with a radius ~900 pc. These observations are the first to resolve the structure of a circumnuclear ring at wavelengths that probe the peak (i.e. λ ~ 100 μm) of the dust spectral energy distribution. The ring dominates the far-infrared (far-IR) emission from the galaxy – the high angular resolution of PACS allows us to isolate the ring's contribution and we find it is responsible for 75, 60 and 55% of the total flux of NGC 1097 at 70, 100 and 160 μm, respectively. We compare the far-IR structure of the ring to what is seen at other wavelengths and identify a sequence of far-IR bright knots that correspond to those seen in radio and mid-IR images. The mid- and far-IR band ratios in the ring vary by less than ±20% azimuthally, indicating modest variation in the radiation field heating the dust on ~600 pc scales. We explore various explanations for the azimuthal uniformity in the far-IR colors of the ring including a lack of well-defined age gradients in the young stellar cluster population, a dominant contribution to the far-IR emission from dust heated by older (>10 Myr) stars and/or a quick smoothing of local enhancements in dust temperature due to the short orbital period of the ring. Finally, we improve previous limits on the far-IR flux from the inner ~600 pc of NGC 1097 by an order of magnitude, providing a better estimate of the total bolometric emission arising from the active galactic nucleus and its associated central starburst.
dc.description.pagesL59
dc.identifier.doihttps://doi.org/10.1051/0004-6361/201014583
dc.identifier.urihttps://hdl.handle.net/20.500.14394/3536
dc.relation.ispartofAstronomy and Astrophysics
dc.relation.urlhttps://scholarworks.umass.edu/cgi/viewcontent.cgi?article=1961&context=astro_faculty_pubs&unstamped=1
dc.source.issue518
dc.source.statuspublished
dc.subjectinfrared: galaxies / galaxies: star formation / galaxies: individual: NGC 1097 / dust
dc.subjectextinction
dc.subjectAstrophysics and Astronomy
dc.titleMapping far-IR emission from the central kiloparsec of NGC 1097
dc.typearticle
dc.typearticle
digcom.contributor.authorSandstrom, K
digcom.contributor.authorKrause, O
digcom.contributor.authorLinz, H
digcom.contributor.authorSchinnerer, E
digcom.contributor.authorDumas, G
digcom.contributor.authorMeidt, S
digcom.contributor.authorRix, H
digcom.contributor.authorSauvage, M
digcom.contributor.authorWalter, F
digcom.contributor.authorKennicutt, R
digcom.contributor.authorisAuthorOfPublication|email:calzetti@astro.umass.edu|institution:University of Massachusetts - Amherst|Calzetti, D
digcom.identifierastro_faculty_pubs/964
digcom.identifier.contextkey1773865
digcom.identifier.submissionpathastro_faculty_pubs/964
dspace.entity.typePublication
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