215 citations · 1.1k across the 39 of their papers we have counts for
6 papers · 1 filter
New Near-Infrared light-curve templates for RR Lyrae variables
V. F. Braga, P. B. Stetson, G. Bono +34
We provide homogeneous optical (UBVRI) and near-infrared (JHK) time series photometry for 254 cluster (omega Cen, M4) and field RR Lyrae (RRL) variables. We ended up with more than…
Is there really a debris disc around ?
V. Faramaz, G. Bryden, K. R. Stapelfeldt +10
The presence of a debris disc around the Gyr-old solar-type star was suggested by the infrared excess detection. Follow-up observations…
Structure and kinematics of Type II Cepheids in the Galactic bulge based on near-infrared VVV data
V. F. Braga, A. Bhardwaj, R. Contreras Ramos +5
Type II Cepheids (T2Cs) are radially pulsating variables that trace old stellar populations and provide distance estimates through their period-luminosity (PL) relation. We trace t…
Dramatic X-ray spectral variability of a Compton-thick type-1 QSO at
Torben Simm, Johannes Buchner, Andrea Merloni +6
We report on the discovery of a dramatic X-ray spectral variability event observed in a broad line type-1 QSO. The XMM-Newton spectrum from the year 2000 is characterized…
Homogeneous metallicities and radial velocities for Galactic globular clusters. II. New CaT metallicities for 28 distant and reddened globular clusters
S. Vásquez, I. Saviane, E. V. Held +6
Although the globular clusters in the Milky Way have been studied for a long time, a significant fraction of them lack homogeneous metallicity and radial velocity measurements. In…
On the RR Lyrae stars in globulars: V. the complete Near-Infrared (JHKs) census of omega Centauri RR Lyrae variables
V. F. Braga, P. B. Stetson, G. Bono +35
We present a new complete Near-Infrared (NIR, ) census of RR Lyrae stars (RRLs) in the globular Cen (NGC 5139). We collected 15,472 images with 4-8m class telesc…