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Evidence of Star Formation in Local S0 Galaxies: Spitzer Observations of the SAURON Sample
Pasquale Temi, Fabrizio Brighenti, William G. Mathews +1
We discuss infrared Spitzer observations of early type galaxies in the SAURON sample at 24, 60 and 170 microns. When compared with 2MASS Ks band luminosities, lenticular (S0) galax…
The X-ray cavities, filaments and cold fronts in the core of the galaxy group NGC 5044
Fabio Gastaldello, David A. Buote, Pasquale Temi +3
We present a two-dimensional analysis of the bright nearby galaxy group NGC 5044 using the currently available Chandra and XMM data. In the inner 10 kpc a pair of cavities are evid…
The Mid-Infrared Spectral Energy Distribution, Surface Brightness and Color Profiles in Elliptical Galaxies
Pasquale Temi, Fabrizio Brighenti, William G. Mathews
We describe photometry at mid-infrared passbands (1.2 - 24 microns) for a sample of 18 elliptical galaxies. All surface brightness distributions resemble de Vaucouleurs profiles, i…
Spitzer Observations of Transient, Extended Dust in Two Elliptical Galaxies: New Evidence of Recent Feedback Energy Release in Galactic Cores
Pasquale Temi, Fabrizio Brighenti, William G. Mathews
Spitzer observations of extended dust in two optically normal elliptical galaxies provide a new confirmation of buoyant feedback outflow in the hot gas atmospheres around these gal…
Far Infrared Spitzer Observations of Elliptical Galaxies: Evidence for Extended Diffuse Dust
Pasquale Temi, Fabrizio Brighenti, William G. Mathews
Far-infrared Spitzer observations of elliptical galaxies are inconsistent with simple steady state models of dust creation in red giant stars and destruction by grain sputtering in…
The Ages of Elliptical Galaxies from Infrared Spectral Energy Distributions
Joel N. Bregman, Pasquale Temi, Jesse D. Bregman
The mean ages of early-type galaxies obtained from the analysis of optical spectra, give a mean age of 8 Gyr at z = 0, with 40% being younger than 6 Gyr. Independent age determinat…
Unusual PAH Emission in Elliptical Galaxies
J. D. Bregman, J. N. Bregman, P. Temi
In a sample of thirty normal elliptical galaxies observed with the Spitzer IRS, one galaxy, NGC4697, shows strong PAH emission, but with an apparently weak 7.7 micron feature. We f…
Mid-Infrared Emission from Elliptical Galaxies: Sensitivity to Stellar Age
Pasquale Temi, Fabrizio Brighenti, William G. Mathews
Mid-infrared observations (3.6 - 24 microns) of normal giant elliptical galaxies with the Spitzer space telescope are consistent with pure populations of very old stars with no evi…
The Disk Atmospheres of Three Herbig Ae/Be Stars
David E. Harker, Charles E. Woodward, Diane H. Wooden +1
We present infrared (IR) spectrophotometry () of three Herbig Ae/Be stars surrounded by possible protoplanetary disks: HD 150193, HD100546 and HD 179218. We construct…
The Ages of Elliptical Galaxies from Mid-Infrared Emission
Pasquale Temi, William G. Mathews, Fabrizio Brighenti
The mid-infrared (10-20 um) luminosity of elliptical galaxies is dominated by the integrated emission from circumstellar dust in red giant stars. As a single stellar population evo…
Variations of the Mid-IR Emission Spectrum in Reflection Nebulae
Jesse D. Bregman, Pasquale Temi
Using spatial-spectral data cubes of reflection nebulae obtained by ISOCAM, we have observed a shift in the central wavelength of the 7.7 um band within several reflection nebulae.…
Cold Dust in Early-Type Galaxies. I. Observations
Pasquale Temi, Fabrizio Brighenti, William G. Mathews +1
We describe far infrared observations of early-type galaxies selected from the ISO archive. This rather inhomogeneous sample includes 39 giant elliptical galaxies and 14 S0 (or lat…
Dust in Hot Gas: Far Infrared Emission from Three Local Elliptical Galaxies
Pasquale Temi, William G. Mathews, Fabrizio Brighenti +1
We present far-IR ISO observations of three early-type galaxies in the Virgo cluster. The data were recorded using the ISOPHOT instrument in both the P32 oversampled maps and the P…
Far Infrared Emission from Elliptical Galaxies: NGC 4649, NGC 4472, and NGC 4636
P. Temi, W. G. Mathews, F. Brighenti +1
We present ISOPHOT P32 oversampled maps and P37/39 sparse maps, of three bright elliptical galaxies in the Virgo Cluster. The maps reach the limiting sensitivity of the ISOPHOT ins…
Mid-IR Observations of Mass Loss in Elliptical Galaxies
Alex E. Athey, Joel N. Bregman, Jesse D. Bregman +2
Early-type galaxies exhibit thermal and molecular resonance emission from dust that is shed and heated through stellar mass loss as a subset of the population moves through the AGB…