215 citations · 893 across the 19 of their papers we have counts for
8 papers · 1 filter
Variable stars in the globular cluster NGC 2419
C. Greco, V. Ripepi, L. Federici +7
We have used DOLORES at the TNG to obtain B,V time series photometry of NGC 2419, one of the most distant and bright clusters in the Galactic halo. These data will be used to study…
Near Infrared Spectroscopy of High Redshift Active Galactic Nuclei. II. Disappearing Narrow Line Regions and the Role of Accretion
H. Netzer, O. Shemmer, R. Maiolino +4
We present new near infrared spectroscopic measurements for 29 luminous high-z quasars and use the data to discuss the size and other properties of the NLRs in those sources. The h…
Near Infrared Spectroscopy of High Redshift Active Galactic Nuclei. I. A Metallicity-Accretion Rate Relationship
O. Shemmer, H. Netzer, R. Maiolino +4
We present new near infrared spectroscopic measurements of the H_beta region for a sample of 29 luminous high redshift quasars. We have measured the width of H_beta in those source…
Anomalous RR Lyrae stars(?). III. CM Leonis
L. Di Fabrizio, G. Clementini, M. Marconi +8
Time series of B,V,I CCD photometry and radial velocity measurements from high resolution spectroscopy (R=30,000) covering the full pulsation cycle are presented for the field RR L…
RR Lyrae variables in the dwarf spheroidal galaxy Leo I
E. V. Held, G. Clementini, L. Rizzi +3
We report the discovery of a significant population of RR Lyrae variables in the dwarf spheroidal galaxy Leo I. Based on 40 V and 22 B images of the galaxy taken using the ESO Wide…
Pismis 2, a poorly studied, intermediate age open cluster
L. Di Fabrizio, A. Bragaglia, M. Tosi +1
We present CCD BVI photometry of the intermediate age open cluster Pismis 2, covering from the brighter red giants to about 5 magnitudes below the main sequence turn-off. The clust…
Metallicities for Double Mode RR Lyrae in the Large Magellanic Cloud
A. Bragaglia, R. G. Gratton, E. Carretta +3
Metallicities for six double mode RR Lyrae's (RRd's) in the Large Magellanic Cloud have been estimated using the DeltaS method. The derived [Fe/H] values are in the range [Fe/H] =…
CU Comae: a new field double-mode RR Lyrae, the most metal poor discovered to date
G. Clementini, S. Di Tomaso, L. Di Fabrizio +12
We report the discovery of a new double-mode RR Lyrae variable (RRd) in the field of our Galaxy: CU Comae. CU Comae is the sixth such RRd identified to date and is the most metal-p…