Extended UV (XUV) Emission in Nearby Galaxy Disks

Authors :: de Paz, A. Gil
Thilker, D. A.
Bianchi, L.
Aragon-Salamanca, A.
Boissier, S.
Madore, B. F.
Diaz-Lopez, C.
Trujillo, I.
Pohlen, M.
Erwin, P.
Zamorano, J.
Gallego, J.
Iglesias-Paramo, J.
Vilchez, J. M.
Molla, M.
Munoz-Mateos, J. C.
Perez-Gonzalez, P. G.
Pedraz, S.
Sheth, K.
Kennicutt Jr, R. C.
Swaters, R.
Team, the GALEX Science
Publication Year :: 2008
Publisher :: arXiv, 2008.
Abstract: We summarize the main properties of the extended UV (XUV) emission found in roughly 30% of the nearby spiral galaxies observed by the GALEX satellite. Two different classes of XUV disks are identified, the Type 1 XUV disks where significant, structured UV-bright features are found beyond the "classical" azimuthally-averaged star-formation threshold, and the Type 2 XUV disks, which are characterized by very extended (seven times the area where most of the stellar mass is found), blue [(FUV-K)<br />4 pages, 2 figures, to appear in the proceedings of "The Formation and Evolution of Galaxy Disks", Rome 2007, organized by the Vatican Observatory, editors J. G. Funes, S.J. and E. M. Corsini