6 papers · 1 filter
A new formulation of the Type Ia SN rate and its consequences on galactic chemical evolution
F. Matteucci, N. Panagia, A. Pipino +3
In recent papers Mannucci et al. (2005, 2006) suggested, on the basis of observational arguments, that there is a bimodal distribution of delay times for the explosion of Type Ia S…
Abundances of refractory elements in the atmospheres of stars with extrasolar planets
G. Gilli, G. Israelian, A. Ecuvillon +2
This work presents a uniform and homogeneous study of chemical abundances of refractory elements in 101 stars with and 94 without known planetary companions. We carry out an in-dep…
Lambda Boo stars with composite spectra
R. Faraggiana, P. Bonifacio, E. Caffau +2
We examine the large sample of lambda Boo candidates collected in Table 1 of Gerbaldi et al. (2003) to see how many of them show composite spectra. Of the 132 lambda Boo candidates…
Modelling the nova rate in galaxies
Francesca Matteucci, Agostino Renda, Antonio Pipino +1
We compute theoretical nova rates as well as type Ia SN rates in galaxies of different morphological type (Milky Way, ellipticals and irregulars) by means of detailed chemical evol…
The Red Giant Branch Bump
M. Riello, G. Piotto, A. Recio-Blanco +2
We present a comparison between theoretical models and the observed magnitude difference between the horizontal branch and the red giant branch bump for a sample of 53 clusters. We…
A possible orbital period for the dwarf nova V1101 Aql
Nicola Masetti, Massimo Della Valle
We have performed a Discrete Fourier Transform on 136 CCD B, V and R frames of the Z Cam-type dwarf nova V1101 Aql. Our analysis indicates as possible orbital period P_orb =3.46 ho…