284 citations · 3.1k across the 55 of their papers we have counts for
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A New Census of the variable star population in the Globular Cluster NGC 2419
M. Di Criscienzo, C. Greco, V. Ripepi +6
We present B, V and I CCD light curves for 101 variable stars belonging to the globular cluster NGC2419, 60 of which are new discoveries, based on datasets obtained at the TNG, SUB…
Flavours of variability: 29 RR Lyrae stars observed with Kepler
J. M. Benkő, K. Kolenberg, R. Szabó +18
We present our analysis of Kepler observations of 29 RR Lyrae stars, based on 138-d of observation. We report precise pulsation periods for all stars. Nine of these stars had incor…
Does Kepler unveil the mystery of the Blazhko effect? First detection of period doubling in Kepler Blazhko RR Lyrae stars
R. Szabó, Z. Kolláth, L. Molnár +15
The first detection of the period doubling phenomenon is reported in the Kepler RR Lyrae stars RR Lyr, V808 Cyg and V355 Lyr. Interestingly, all these pulsating stars show Blazhko…
A decline and fall in the future of Italian Astronomy?
Angelo Antonelli, Vincenzo Antonuccio-Delogu, Andrea Baruffolo +89
On May 27th 2010, the Italian astronomical community learned with concern that the National Institute for Astrophysics (INAF) was going to be suppressed, and that its employees wer…
The helium spread in the Globular cluster 47 Tuc
M. Di Criscienzo, P. Ventura, F. D' Antona +2
Spectroscopy has shown the presence of the CN band dicothomy and the Na-O anticorrelations for 50--70% of the investigated samples in the cluster 47 Tuc, otherwise considered a "no…
Terzan 5: an alternative interpretation for the split horizontal branch
F. D'Antona, P. Ventura, V. Caloi +4
We consider the horizontal branch (HB) of the Globular Cluster Terzan 5, recently shown to be split into two parts, the fainter one (delta M_K ~ 0.3mag) having a lower metallicity…
Hybrid gamma Doradus - delta Scuti pulsators: New insights into the physics of the oscillations from Kepler observations
A. Grigahcene, V. Antoci, L. Balona +39
Observations of the pulsations of stars can be used to infer their interior structure and test theoretical models. The main sequence Doradus (Dor) and Scuti (Sct) stars wit…
First Kepler results on RR Lyrae stars
K. Kolenberg, R. Szabó, D. W. Kurtz +21
We present the first results of our analyses of selected RR Lyrae stars for which data have been obtained by the Kepler Mission. As expected, we find a significant fraction of the…