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32 papers · 1 filter
Comparing different approaches to model the rotational modulation of the Sun as a star
A. F. Lanza, A. S. Bonomo, M. Rodono'
The space missions MOST, COROT and Kepler are going to provide us with high-precision optical photometry of solar-like stars with time series extending from tens of days to several…
Seismology of Procyon A: determination of mode frequencies, amplitudes, lifetimes, and granulation noise
S. Leccia, H. Kjeldsen, A. Bonanno +3
The F5 IV-V star Procyon A (aCMi) was observed in January 2001 by means of the high resolution spectrograph SARG operating with the TNG 3.5m Italian telescope (Telescopio Nazionale…
The amalgamated duplication of a ring along a multiplicative-canonical ideal
Marco D'Anna, Marco Fontana
After recalling briefly the main properties of the amalgamated duplication of a ring along an ideal , denoted by $R\JoinI$, we restrict our attention to the study of the pro…
Spin-boson dynamics: A unified approach from weak to strong coupling
Francesco Nesi, Elisabetta Paladino, Michael Thorwart +1
We present a novel approximation scheme to describe the influence of a harmonic bath on the dynamics of a two-level particle over almost the whole regime of temperatures and coupli…
Pulsation in the atmosphere of the roAp star HD 24712. I. Spectroscopic observations and radial velocity measurements
T. Ryabchikova, M. Sachkov, W. W. Weiss +10
We have investigated the structure of the pulsating atmosphere of one of the best studied rapidly oscillating Ap stars, HD 24712. For this purpose we analyzed spectra collected dur…
Microscopic calculations of double and triple Giant Resonance excitation in heavy ion collisions
E. G. Lanza, F. Catara, M. V. Andres +3
We perform microscopic calculations of the inelastic cross sections for the double and triple excitation of giant resonances induced by heavy ion probes within a semicalssical coup…