5 papers
Massive Variability Surveys from Venezuela
Cesar Briceno
At the Venezuela National Astronomical Observatory we are carrying out variability surveys spanning many hundreds of square degrees near the celestial equator, using an 8k x 8k CCD…
The Brown Dwarf Deficit in Taurus: Evidence for a Non-Universal IMF
Cesar Briceno, Kevin Luhman, Lee Hartmann +2
We present the results of a deep, optical/IR wide field imaging survey of selected fields in the nearby (d ~ 140 pc) Taurus star-forming region. We report the discovery of 9 new me…
The low-mass young stellar population in Orion OB1
Cesar Briceño, Nuria Calvet, Anna K. Vivas +2
We present recent results from our ongoing large scale variability survey of the Orion OB1 Association. In an area of ~ 25 square degrees we have unveiled new populations of low-ma…
Disk Accretion at 10 Myr: Results from the TW Hydrae Association
James Muzerolle, Lynne Hillenbrand, Nuria Calvet +2
We present an analysis of the accretion properties of the members of the TW Hydrae association. The Halpha emission line profile provides explicit evidence of an active accretion f…
The CIDA-QUEST Large Scale Variability Survey in the Orion OB Association: initial results
Cesar Briceno, A. Katherina Vivas, Nuria Calvet +2
Using the 8k x 8k CCD Mosaic Camera on the 1m Schmidt telescope in Venezuela, we are conducting a large-scale, deep optical, multiepoch, photometric (BVRIHa) survey over 120 sq.deg…