311 citations · 1.7k across the 47 of their papers we have counts for
7 papers · 2 filters
The influence of chemical composition on the properties of Cepheid stars I - Period-Luminosity relation vs iron abundance
M. Romaniello, F. Primas, M. Mottini +3
We have assessed the influence of the stellar iron content on the Cepheid Period-Luminosity (PL) relation by relating the V band residuals from the Freedman et al (2001) PL relatio…
The Metallicity dependence of the Cepheid Period-Luminosity relation: methodology and results
Marta Mottini, Martino Romaniello, Francesca Primas +3
We present the results of an observational campaign undertaken to assess the influence of the iron content on the Cepheid Period-Luminosity relation. Our data indicate that this de…
RASS-SDSS galaxy cluster survey. II. A unified picture of the Cluster Luminosity Function
Paola Popesso, Hans Boehringer, Martino Romaniello +1
We constructed the composite luminosity function (LF) of clusters of galaxies in the five SDSS photometric bands u,g,r,i and z from the RASS-SDSS galaxy cluster catalog. Background…
Metal abundances in extremely distant Galactic old open clusters. I. Berkeley 29 and Saurer 1
Giovanni Carraro, Fabio Bresolin, Sandro Villanova +3
We report on high resolution spectroscopy of four giant stars in the Galactic old open clusters Berkeley~29 and Saurer~1 obtained with HIRES at the Keck telescope. These two cluste…
The metallicity dependence of the Cepheid PL-relation
M. A. T. Groenewegen, M. Romaniello, F. Primas +1
A sample of 37 Galactic, 10 LMC and 6 SMC cepheids is compiled for which individual metallicity estimates exist and BVIK photometry in almost all cases. The Galactic cepheids all h…
Low-Mass Pre-Main Sequence Stars in the Large Magellanic Cloud - III: Accretion Rates from HST-WFPC2 Observations
Martino Romaniello, Massimo Robberto, Nino Panagia
We have measured the present accretion rate of roughly 800 low-mass (~1-1.4 Mo) pre-Main Sequence stars in the field of Supernova 1987A in the Large Magellanic Cloud (LMC, Z~0.3 Zo…