258 citations · 577 across the 14 of their papers we have counts for
14 papers
White Dwarfs in the Metal-Rich Open Cluster NGC 6253
Elizabeth J. Jeffery, Fabiola Campos, Alejandra Romero +1
We have obtained 53 images with the filter and 19 images with the filter, each with 600-second exposures of the super metal rich open cluster NGC 6253 with the Gemini-South…
An asteroseismic constraint on the mass of the axion from the period drift of the pulsating DA white dwarf star L19-2
Alejandro H. Córsico, Alejandra D. Romero, Leandro G. Althaus +6
We employ an asteroseismic model of L19-2, a relatively massive ($M_{\star} \sim 0.75 M_{\sun}$) and hot ( K) pulsating DA (H-rich atmosphere) white dwarf…
Two new pulsating low-mass pre-white dwarfs or SX Phenix stars?*
M. A. Corti, A. Kanaan, A. H. Córsico +4
Context. The discovery of pulsations in low-mass stars opens an opportunity for probing their interiors and to determine their evolution, by employing the tools of asteroseismology…
A comparative analysis of the observed white dwarf cooling sequence from globular clusters
Fabíola Campos, P. Bergeron, A. D. Romero +8
We report our study of features at the observed red end of the white dwarf cooling sequences for three Galactic globular clusters: NGC\,6397, 47\,Tucanae and M\,4. We use deep colo…
New white dwarf stars in the Sloan Digital Sky Survey Data Release 10
S. O. Kepler, Ingrid Pelisoli, Detlev Koester +11
We report the discovery of 9 089 new spectroscopically confirmed white dwarfs and subdwarfs in the Sloan Digital Sky Survey Data Release 10. We obtain Teff, log g and mass for hydr…
New SX Phe variables in the globular cluster NGC 288
E. Martinazzi, S. O. Kepler, J. E. S. Costa +4
We report the discovery of two new variable stars in the metal-poor globular cluster NGC 288, found by means of time-series CCD photometry. We classified the new variables as SX Ph…