109 citations · 239 across the 6 of their papers we have counts for
6 papers
Rossby numbers of fully and partially convective stars
N. R. Landin, L. T. S. Mendes, L. P. R. Vaz +1
We investigate stellar magnetic activity from the theoretical point of view, by using stellar evolution models to calculate theoretical convective turnover times () and…
Near-Infrared Variability in the Orion Nebula Cluster
Thomas S. Rice, Bo Reipurth, Scott J. Wolk +2
Using the United Kingdom Infrared Telescope on Mauna Kea, we have carried out a new near-infrared J, H, K monitoring survey of almost a square degree of the star-forming Orion Nebu…
Absolute properties of the eclipsing binary system AQ Serpentis: A stringent test of convective core overshooting in stellar evolution models
Guillermo Torres, Luiz Paulo R. Vaz, Claud H. Sandberg Lacy +1
We report differential photometric observations and radial-velocity measurements of the detached, 1.69-day period, double-lined eclipsing binary AQ Ser. Accurate masses and radii f…
Non-gray rotating stellar models and the evolutionary history of the Orion Nebular Cluster
Natália R. Landin, Paolo Ventura, Francesca D'Antona +2
Rotational evolution in the pre-main sequence (PMS) is described with new sets of PMS evolutionary tracks including rotation, non-gray boundary conditions (BCs) and either low (LCE…
Dynamical Mass Constraints on Low-Mass Pre-Main-Sequence Stellar Evolutionary Tracks: An Eclipsing Binary in Orion with a 1.0 Msun Primary and an 0.7 Msun Secondary
Keivan G. Stassun, Robert D. Mathieu, Luiz Paulo R. Vaz +2
We report the discovery of a double-lined, spectroscopic, eclipsing binary in the Orion star-forming region. We analyze the system spectroscopically and photometrically to empirica…
BVRI-Halpha surface photometry of peculiar ring galaxies. I. HRG 2302
M. L. M. Myrrha, L. P. R. Vaz, M. Faúndez-Abans +2
Detailed BVRI-Halpha photometry has been obtained for the ring galaxy HRG 2302. This is probably a still interacting system which shows two principal components: the target, which…