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17 papers · 1 filter
A new unifying model for X--ray and radio--selected BL Lacs
G. Fossati, A. Celotti, G. Ghisellini +1
We discuss alternative interpretations of the differences in the Spectral Energy Distributions (SEDs) of BL Lacs found in complete Radio or X--ray surveys. In order to explain the…
Mode typing of the dominant mode in the Delta Sct star X Cae by line profile moments
L. Mantegazza, E. Poretti
We use moment method developed by Balona (1987) to identify the dominant mode of the multimode pulsating Delta Scuti star X Cae. It is shown as a l=1 and m=-1 non-radial mode gives…
The Gamma Doradus variables, a new class of pulsating stars. The case of HD 224945
E. Poretti, C. Akan, M. Bossi +3
A multisite campaign involving five observatories allowed us to solve the light curve of the Gamma Doradus star HD 224945. The multiperiodic content, the high frequency term at 3.0…
The galactic double-mode Cepheids II. Properties of the generalized phase differences
Ennio Poretti, Ilaria Pardo
By considering the least-squares fits of the double-mode Cepheid light curves discussed in Paper I we defined their properties by their Fourier parameters and generalized phase dif…
The galactic double-mode Cepheids I. Frequency analysis of the light curves and comparison with single-mode Cepheids
Ennio Poretti, Ilaria Pardo
We submitted the available photometric V data of all the known galactic Double Mode Cepheids (DMCs) to a careful frequency analysis with the aim of detecting in each case the impor…
Time dependent spectra of Blazars
Marco Chiaberge, Gabriele Ghisellini
We calculate the time dependent electron distribution under the assumption of continuous injection of new relativistic particles, and assuming radiative cooling (by sinchrotron and…