Central UV Spikes in two Galactic Spheroids

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dc.creatorCappellari, Michele
dc.creatorBertola, Francesco
dc.creatorBurstein, David
dc.creatorBuson, Lucio M.
dc.creatorGreggio, Laura
dc.creatorRenzini, Alvio
dc.date1999-01-27
dc.date.accessioned2026-07-07T02:30:13Z
dc.date.available2026-07-07T02:30:13Z
dc.descriptionFOS spectra and FOC photometry of two centrally located, UV-bright spikes in the elliptical galaxy NGC 4552 and the bulge-dominated early spiral NGC 2681, are presented. These spectra reveal that such point-like UV sources detected by means of HST within a relatively large fraction ~15% of bulges can be related to radically different phenomena. While the UV unresolved emission in NGC 4552 represents a transient event likely induced by an accretion event onto a supermassive black hole, the spike seen at the center of NGC 2681 is not variable and it is stellar in nature.
dc.description4 pages, 4 figures (LaTeX, cupconf.sty). To appear in the proceedings of the STScI workshop "When and How do Bulges Form and Evolve", eds. C. M. Carollo, H. C. Ferguson, and R. F. G. Wyse, Cambridge: CUP
dc.identifierhttps://arxiv.org/abs/astro-ph/9901381
dc.identifierhttp://arxiv.org/abs/astro-ph/9901381
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/13746
dc.subjectAstrophysics
dc.titleCentral UV Spikes in two Galactic Spheroids
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