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

dc.contributor.authorGil De Paz, Armando
dc.date.accessioned2023-06-20T04:05:06Z
dc.date.available2023-06-20T04:05:06Z
dc.date.issued2010-07
dc.description© ESO, 2010. Artículo firmado por 42 autores. The authors thank R. Beck for the radio continuum data and P.-Y. Hsieh for the CO data. K. S. would like to thank G. van de Ven and L. Burtscher for useful discussions. PACS has been developed by a consortium of institutes led by MPE (Germany) and including UVIE (Austria); KU Leuven, CSL, IMEC (Belgium); CEA, LAM (France); MPIA (Germany); INAF- IFSI/OAA/OAP/OAT, LENS, SISSA (Italy); IAC (Spain). This development has been supported by the funding agencies BMVIT (Austria), ESA-PRODEX (Belgium), CEA/CNES (France), DLR (Germany), ASI/INAF (Italy), and CICYT/MCYT (Spain).
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.departmentDepto. de Física de la Tierra y Astrofísica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipBMVIT (Austria)
dc.description.sponsorshipESA-PRODEX (Belgium)
dc.description.sponsorshipCEA (France)
dc.description.sponsorshipDLR (Germany)
dc.description.sponsorshipASI (Italy)
dc.description.sponsorshipMinisterio de Ciencia y Tecnología (MCYT), España
dc.description.sponsorshipCNES (France)
dc.description.sponsorshipINAF (Italy)
dc.description.sponsorshipComisión Interminnisterial de Ciencia y Tecnología (CICYT), España
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/35598
dc.identifier.doi10.1051/0004-6361/201014583
dc.identifier.issn0004-6361
dc.identifier.officialurlhttp://dx.doi.org/10.1051/0004-6361/201014583
dc.identifier.relatedurlhttp://www.aanda.org/
dc.identifier.urihttps://hdl.handle.net/20.500.14352/44893
dc.journal.titleAstronomy & Astrophysics
dc.language.isoeng
dc.publisherEDP Sciencies
dc.rights.accessRightsopen access
dc.subject.cdu52
dc.subject.keywordSpectral energy-distribution
dc.subject.keywordStar-formation
dc.subject.keywordGalaxy NGC-1097
dc.subject.keywordNuclear rings
dc.subject.keywordNearby galaxies
dc.subject.keywordSpiral galaxies
dc.subject.keywordActive nucleus
dc.subject.keywordStarburst
dc.subject.keywordUltraviolet
dc.subject.keywordTelescope
dc.subject.ucmAstrofísica
dc.subject.ucmAstronomía (Física)
dc.titleMapping far-IR emission from the central kiloparsec of NGC 1097
dc.typejournal article
dc.volume.number518
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relation.isAuthorOfPublication.latestForDiscovery7fb1c66f-848a-4aa3-a350-88c633947323

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