Abstract
The Hubble sequence which is determined from optical images is accompanied by a clear progression in the manifestation of the ISM and star formation rates. At one extreme elliptical galaxies present visible spectra predominantly characteristic of late type stars, and at the other, spirals show young blue stars with evidence of dust, neutral and ionized gas. The spectra of normal ellipticals in the visible are remarkably uniform (Gregg 1989) and differ only in details, but the discovery of significant UV flux in these seemingly normal galaxies is one of the outstanding contributions of space astronomy (UV rockets, Copernicus, TD1, ANS and most recently IUE).
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© 1992 Springer Science+Business Media Dordrecht
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Danks, A., PĂ©rez, M. (1992). Ultraviolet Spectra of Early-Type Galaxies. In: Longo, G., Capaccioli, M., Busarello, G. (eds) Morphological and Physical Classification of Galaxies. Astrophysics and Space Science Library, vol 178. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-2522-2_41
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DOI: https://doi.org/10.1007/978-94-011-2522-2_41
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