The Quest for the Dominant Stellar Population in the Giant Elliptical NGC 5018
(2000)
NGC 4672: a new case of an early-type disk galaxy with an orthogonally decoupled core
(2000)
Ultraviolet imaging of the galaxy cluster CL 0939+4713 (Abell 851) at z = 0.41
Astrophysical Journal 531:2 PART 1 (2000) 684-692
Abstract:
The first UV F300W and F218W WFPC2 observations of the rich galaxy cluster CL 0939 + 4713 at z = 0.41 are presented and discussed. UV/optical two-color and color-magnitude diagrams of the sources detected in the F300W waveband are constructed. Thanks to preexisting Hubble Space Telescope (HST) optical images of the same field, a morphological classification for the majority of these objects is also provided. Moreover, taking advantage of recent redshift surveys along the CL 0939 + 4713 line of sight, separate diagrams comparing the properties of galaxies belonging to the cluster and to its close projected field are presented. Possible evolutionary effects in the UV from z ∼ 0.4 to the present time are investigated by comparing the rest-frame (mid-UV/optical) colors of galaxies in CL 0939 + 4713 with balloon-borne data of the Coma Cluster, as well as by resorting to suitable galaxy evolution models. Finally, current attempts to constrain the epoch of the UV-upturn onset in evolved populations by means of HST UV observations are discussed.Central UV Spikes in Two Galactic Spheroids
Chapter in The Formation of Galactic Bulges, Cambridge University Press (CUP) (2000) 191-194