7 papers
IRAC Colors of Young Stellar Objects
Lori E. Allen, Nuria Calvet, Paola D'Alessio +8
We compare the infrared colors predicted by theoretical models of protostellar envelopes and protoplanetary disks with initial observations of young stellar objects made with the I…
Models of Accretion Disks around Young Stars
Paola D'Alessio, Nuria Calvet, Lee Hartmann +2
We discuss the importance of accretion in calculating disk models for young stellar objects. In particular, we show that a disk inner rim, irradiated by both the star and the accre…
Testing the Paradigm of Low-Mass Star Formation
Lee Hartmann
Protostellar core formation is probably much more dynamic, and magnetic fields are probably much less important, than has been previously assumed in the standard model of low-mass…
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…
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…