Early Type Galaxies in the Mid Infrared

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dc.creatorBressan, A.
dc.creatorPanuzzo, P.
dc.creatorSilva, L.
dc.creatorBuson, L.
dc.creatorClemens, M.
dc.creatorGranato, G. L.
dc.creatorRampazzo, R.
dc.creatorValdes, J. R.
dc.creatorVega, O.
dc.date2007-01-22
dc.date.accessioned2026-07-07T07:42:02Z
dc.date.available2026-07-07T07:42:02Z
dc.descriptionWe are performing a systematic study of the properties of early-type galaxies in the mid infrared spectral region with the Spitzer Space Telescope. We present here high S/N Spitzer IRS spectra of 17 Virgo early-type galaxies. Thirteen objects of the sample (76%) show a pronounced broad feature (above 10 microns) which is spatially extended and likely of stellar origin. We argue that this feature is (mostly) due to silicate emission from circumstellar envelopes of asymptotic giant branch (AGB) stars. The remaining 4 objects, namely NGC 4486, NGC 4636, NGC 4550 and NGC 4435, are characterized by various levels and type of activity.
dc.descriptionComments: 8 pages, to appear in the Proceedings of the Conf. "From Stars to Galaxies: Building the Pieces to Build Up the Universe", Vallenari et al. eds., ASP Conf. Series
dc.identifierhttps://arxiv.org/abs/astro-ph/0701620
dc.identifierhttp://arxiv.org/abs/astro-ph/0701620
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/122337
dc.subjectAstrophysics
dc.titleEarly Type Galaxies in the Mid Infrared
dc.typetext

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