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Article
The UV window on counter rotating ETGs: insight from SPH simulations with chemo-photometric implementation
The Galaxy Evolution Explorer (GALEX) detected ultraviolet emission in about 50 % of multi-spin early-type galaxies (ETGs), suggesting the occurrence of a recent rejuvenation episode connected to the formation of...
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Article
An extended ultraviolet ring around the SB0 galaxy NGC 4262
We present Galaxy Ultraviolet Explorer (GALEX) satellite observations of the SB0 galaxy NGC 4262 where we detect an extended, outer ring studded with UV-bright knots surrounding the galaxy body. Such a structu...
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Article
Signatures of recent star formation in ring S0 galaxies
We present a study of the stellar populations of ring and/or arm-like structures in a sample of S0 galaxies using GALEX far- and near-ultraviolet imaging and SDSS optical data. Such structures are prominent in th...
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Article
Tracing the evolution of nearby early-type galaxies in low density environments. The ultraviolet view from GALEX
We detected recent star formation in nearby early-type galaxies located in low density environments, with GALEX Ultraviolet (UV) imaging. Signatures of star formation may be present in the nucleus and in outer ri...
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Chapter and Conference Paper
Tracing Galaxy Evolution in the Field: the UV Emission in Shell Galaxies Mapped by GALEX
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Article
Photometric and spectrophotometric observations of the evolution of a strong outburst of the classical symbiotic star YY Herculis
We present spectrophotometric (3400–7500 Å) observations of the evolution of a strong outburst of the classical symbiotic star YY Her in 1993 and photoelectric UBV observations of the star’s eclipse in 1997. The ...
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Chapter and Conference Paper
HST Far-UV Imaging of M 31, M 32 and NGC 205
Direct measures of luminosity functions, UV fluxes and colors of the hot stars that produce the UV turn-up in the SED of ellipticals and spiral bulges is the scientific goal of the HST observations presented h...
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Chapter
IUE/HST-FOC Search for Hot Stars in Nearby Galaxies
More than a decade of IUE observations have shown that the UV spectral energy distribution (SED) of early-type galaxies is driven by the combined effects of the age and metallicity of the stellar population. I...
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Chapter
As 304: Does IUE Discover the Youngest Symbiotic Star?
The nature and evolutionary status of the hot component of symbiotic stars is still a matter of debate. Given the wide range of displayed properties, a homogeneous survey of a significant sample of objects see...
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Chapter and Conference Paper
The Origin of the Ionized Gas in S0 Galaxies
Several pieces of evidence indicate that the ionized gas present in elliptical galaxies is in the majority of the cases of external origin. In particular, the counter-rotation of the gas with respect to the st...
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Chapter and Conference Paper
Counter-Rotation in Dust-Lane Ellipticals
The class of dust-lane ellipticals is characterized by the presence of a lane of absorbing matter which crosses an elliptical-like galaxy body. The dust lane consists of gas and dust and appears ring-like or a...
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Chapter and Conference Paper
The Far-UV Spectra of Early-Type Galaxies
The principal purpose of the present review is to summarize the current body of knowledge of the UV energy distributions of early-type galaxies. The emphasis will be on those issues, both observational and the...
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Chapter and Conference Paper
Structural Properties of Early-Type Galaxies in Low Density Environments: Pairs
Both formation conditions and subsequent environmental effects could have affected the present structure of ‘normal’ early-type galaxies. In the past few years it has been widely assumed that isophotal twists ...
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Article
Counter-rotation in dust-lane ellipticals and the implications for accretion events in galaxies
Decoupling of angular momenta of gas and stars in elliptical galaxies constitutes evidence for the acquisition of external material by these galaxies later in their history. In minor-axis dust-lane ellipticals...
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Chapter and Conference Paper
Global Stellar Populations of Elliptical Galaxies: B. Ultraviolet Energy Distributions
Ultraviolet energy distributions have been derived from IUE spectra for 32 early-type galaxies, including 30 elliptical and SO galaxies. These are combined with V magnitudes, Mg2 indices and central velocity disp...
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Chapter and Conference Paper
Ultraviolet Energy Distributions of (32) Early-Type Galaxies
New, self-consistent energy distribution have been generated from 52 short - wavelength and 40 long-wavelength IUE spectra of 31 early-type galaxies, plus the bulge of M31. All galaxies in this sample have mea...
