2 research outputs found
BVRI Light Curves for 29 Type Ia Supernovae
BVRI light curves are presented for 27 Type Ia supernovae discovered during
the course of the Calan/Tololo Survey and for two other SNe Ia observed during
the same period. Estimates of the maximum light magnitudes in the B, V, and I
bands and the initial decline rate parameter m15(B) are also given.Comment: 17 pages, figures and tables are not included (contact first author
if needed), to appear in the Astronomical Journa
A proper motion survey. I. hyades and UMa moving groups
We analyze the results of a proper motion survey in a couple of ESO R 5° X 5° fields, finding evidence for faint (and primarily red) members of the Hyades and UMa moving groups. By the velocity ellipsoid of the Hyades and UMa streams and technique described by Méndez & Ruiz [AJ, 103, 911 (1992) we estimate number densities and nonbiased velocity dispersions for each moving group.Our results suggest that the Hyades moving group extends at least 96 pc in the solid angle covered by our survey, while the UMa moving group shws a decrease in density past 36 pc, indicating that we are looking beyond it. The large tangenital velocity dispersion for both moving groups suggest on the other hand that they are not gravitationaly bound