Spitzer Imaging of nearby ULIRGs and their Progeny: Fine-Structure Elliptical Galaxies

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dc.creatorSurace, J. A.
dc.creatorWang, Z.
dc.creatorWillner, S.
dc.creatorSmith, H.
dc.creatorPipher, J.
dc.creatorForrest, W.
dc.creatorFazio, G.
dc.creatorHowell, J.
dc.creatorEvans, A.
dc.creatorHibbard, J.
dc.creatorYan, L.
dc.creatorMarleau, F.
dc.date2006-01-04
dc.date.accessioned2026-07-07T06:56:53Z
dc.date.available2026-07-07T06:56:53Z
dc.descriptionWe present results from two mid-infrared imaging programs of ultraluminous infrared galaxies (ULIRGs) and fine-structure elliptical galaxies. The former are known to nearly all be recent mergers between two gas-rich spiral galaxies, while the latter are also believed to be even more aged merger remnants. An examination of these two classes of objects, which may represent different stages of the same putative merger sequence, should reveal similarities in the distribution of their stellar populations and dust content consistent with that expected for time-evolution of the merger. The data reveal for the first time extended dust emission in the ULIRG galaxy bodies and along their tidal features. However, contrary to expectation, we find that the vast majority of the fine-structure elliptical galaxies lack such structured emission. This likely results from the optical selection of the elliptical sample, resulting in a population that reflects the IR-activity (or lack thereof) of optically selected interacting galaxies. Alternately, this may reflect an evolutionary process in the distribution of the dust content of the galaxy bodies.
dc.description5 pages, Proceedings of the 2005 Lijiang Conference, "Extreme Starbursts: Near and Far", editors: Yu Gao & D. B. Sanders, to be published in the special issue of Pub. of PMO
dc.identifierhttps://arxiv.org/abs/astro-ph/0601066
dc.identifierhttp://arxiv.org/abs/astro-ph/0601066
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/106769
dc.subjectAstrophysics
dc.titleSpitzer Imaging of nearby ULIRGs and their Progeny: Fine-Structure Elliptical Galaxies
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