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200 papers · 1 filter
Nebular Spectra and Explosion Asymmetry of Type Ia Supernovae
Keiichi Maeda, Stefan Taubenberger, Jesper Sollerman +4
The spectral signatures of asymmetry in Type Ia Supernova (SN Ia) explosions are investigated, using a sample of late-time nebular spectra. First, a kinematical model is constructe…
Detailed Characterization of H_beta emission line profile in low z SDSS quasars
S. Zamfir, J. W. Sulentic, P. Marziani +1
We explore the properties of the H_beta emission line profile in a large, homogeneous and bright sample of N~470 low redshift quasars extracted from Sloan Digital Sky Survey (DR5).…
Galaxy Evolution in Local Group Analogs. I. A GALEX study of nearby groups
A. Marino, L. Bianchi, R. Rampazzo +2
Understanding the astrophysical processes acting within galaxy groups and their effects on the evolution of the galaxy population is one of the crucial topic of modern cosmology, a…
Main-Sequence and sub-giant stars in the Globular Cluster NGC6397: The complex evolution of the lithium abundance
J. I. González Hernández, P. Bonifacio, E. Caffau +6
Thanks to the high multiplex and efficiency of Giraffe at the VLT we have been able for the first time to observe the Li I doublet in the Main Sequence (MS) stars of a Globular Clu…
The Planck On-Flight Forecaster (POFF)
M. Massardi, C. Burigana
The Planck On-Fligh Forecaster (POFF) is a tool to predict when a position in the sky will be within a selected angular distance from any receiver direction of the Planck satellite…
Optical and near infrared coverage of SN 2004et: physical parameters and comparison with other type IIP supernovae
K. Maguire, E. Di Carlo, S. J. Smartt +22
We present new optical and near infrared (NIR) photometry and spectroscopy of the type IIP supernova, SN 2004et. In combination with already published data, this provides one of th…