251 citations · 706 across the 5 of their papers we have counts for
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Long-wavelength excesses of FU Orionis objects: flared outer disks or infalling envelopes?
Zhaohuan Zhu, Lee Hartmann, Nuria Calvet +3
The mid- to far-infrared emission of the outbursting FU Orionis objects has been attributed either to a flared outer disk or to an infalling envelope. We revisit this issue using d…
A Spitzer view of protoplanetary disks in the gamma Velorum cluster
Jesus Hernandez, Lee Hartmann, Nuria Calvet +4
We present new Spitzer Space Telescope observations of stars in the young ~5 Myr gamma Velorum stellar cluster. Combining optical and 2MASS photometry, we have selected 579 stars a…
Spitzer observations of the Orion OB1 association: disk census in the low mass stars
Jesus Hernandez, Nuria Calvet, C. Briceno +6
We present new Spitzer Space Telescope observations of two fields in the Orion OB1 association. We report here IRAC/MIPS observations for 115 confirmed members and 41 photometric c…
The Hot Inner Disk of FU Ori
Zhaohuan Zhu, Lee Hartmann, Nuria Calvet +3
We have constructed a detailed radiative transfer disk model which reproduces the main features of the spectrum of the outbursting young stellar object FU Orionis from ~ 4000 angst…
Disk evolution in the Ori OB1 association
Nuria Calvet, Cesar Briceno, Jesus Hernandez +5
We analyze multi-band photometry of a subsample of low mass stars in the associations Ori OB1a and 1b discovered during the CIDA Orion Variability Survey, which have ages of 7 - 10…
Herbig Ae/Be Stars in nearby OB associations
Jesus Hernandez, Nuria Calvet, Lee Hartmann +4
We have carried out a study of the early type stars in nearby OB associations spanning an age range of 3 to 16 Myr, with the aim of determining the fraction of stars which b…