Publications (12)
Unusual PAH Emission in Nearby Early-Type Galaxies: A Signature of an Intermediate Age Stellar Population?
O. Vega, A. Bressan, P. Panuzzo +6
We present the analysis of Spitzer-IRS spectra of four early-type galaxies, NGC 1297, NGC 5044, NGC 6868, and NGC 7079, all classified as LINERs in the optical bands. Their IRS spe…
UB CCD photometry of the old, metal rich, open clusters NGC 6791, NGC 6819 and NGC 7142
G. Carraro, A. Buzzoni, E. Bertone +1
We report on a UV-oriented imaging survey in the fields of the old, metal-rich open clusters, NGC 6791, NGC 6819 and NGC 7142. These three clusters represent both very near and ide…
Early Type Galaxies in the Mid Infrared: a new flavor to their stellar populations
A. Bressan, P. Panuzzo, O. Vega +6
The mid infrared emission of early type galaxies traces the presence of intermediate age stellar populations as well as even tiny amounts of ongoing star formation. Here we discuss…
The mid-infrared colour-magnitude relation of early-type galaxies in the Coma cluster as measured by Spitzer-IRS
M. S. Clemens, A. Bressan, P. Panuzzo +4
We use 16 micron, Spitzer-IRS, blue peakup photometry of 50 early-type galaxies in the Coma cluster to define the mid-infrared colour-magnitude relation. We compare with recent sim…
Early-type galaxies in the near-infrared: 1.5-2.4\mum spectroscopy
M. Cesetti, V. D. Ivanov, L. Morelli +6
Near-infrared (hereafter NIR) data may provide complementary information to the traditional optical population synthesis analysis of unresolved stellar populations because the spec…
SPITZER IRS spectra of Virgo early type galaxies: detection of stellar silicate emission
A. Bressan, P. Panuzzo, L. Buson +7
We present high signal to noise ratio Spitzer Infrared Spectrograph observations of 17 Virgo early-type galaxies. The galaxies were selected from those that define the colour-magni…