5 papers
A tale of three cataclysmic variables with distinct superhumps
Arti Joshi, Claus Tappert, Márcio Catelan +2
We present the TESS observations of CRTS J110014.7+131552, SDSS J093537.46+161950.8, and [PK2008] HalphaJ130559. Among them, a superoutburst is observed in CRTS J110014.7+131552 wh…
The outer-halo globular cluster NGC 6229. III. Deep CCD photometry
J. Borissova, M. Catelan, F. R. Ferraro +5
Deep BV photometry for a large field covering the outer-halo globular cluster NGC 6229 is presented. For the first time, a colour-magnitude diagram (CMD) reaching below the main se…
The Second-Parameter Effect in Metal-Rich Globular Clusters
A. V. Sweigart, M. Catelan
Recent Hubble Space Telescope observations have found that the horizontal branches (HB's) in the metal-rich globular clusters NGC 6388 and NGC 6441 slope upward with decreasing B-V…
Is There a Difference in Luminosity between Field and Cluster RR Lyrae Variables?
M. Catelan
Recent Hipparcos results have lent support to the idea that RR Lyrae variables in the halo field and in globular clusters differ in luminosity by ~0.2mag. In this Letter, we study…
Color-Magnitude Diagrams of Merged Globular Clusters: Metallicity Effects
M. Catelan
Mergers of globular clusters (GCs) once associated with dwarf spheroidal (dSph) galaxies have recently been suggested as an explanation for the bimodal horizontal branches (HBs) of…