568 citations · 21.9k across the 202 of their papers we have counts for
13 papers · 2 filters
Discovery of a Planetary-Mass Brown Dwarf with a Circumstellar Disk
K. L. Luhman, Lucia Adame, Paola D'Alessio +4
Using the Hubble Space Telescope, the 4 m Blanco telescope at the Cerro Tololo Inter-American Observatory, and the Spitzer Space Telescope, we have performed deep imaging from 0.8…
Identifying Primordial Substructure in NGC 2264
Paula S. Teixeira, Charles J. Lada, Erick T. Young +8
We present new Spitzer Space Telescope observations of the young cluster NGC2264. Observations at 24 micron with the Multiband Imaging Photometer has enabled us to identify the mos…
Effects of Dust Growth and Settling in T Tauri Disks
Paola D'Alessio, Nuria Calvet, Lee Hartmann +2
We present self-consistent disk models for T Tauri stars which include a parameterized treatment of dust settling and grain growth, building on techniques developed in a series of…
Spitzer/IRAC Photometry of the Eta Chameleontis Association
S. T. Megeath, L. Hartmann, K. L. Luhman +1
We present IRAC 3.6, 4.5, 5.8 and 8 micron photometry for the 17 A, K and M type members of the Eta Chameleontis association. These data show infrared excesses toward six of the 15…
The Disk Fractions of Brown Dwarfs in IC 348 and Chamaeleon I
K. L. Luhman, C. J. Lada, L. Hartmann +7
Using the Infrared Array Camera (IRAC) aboard the Spitzer Space Telescope, we have obtained mid-infrared photometry for 25 and 18 low-mass members of the IC 348 and Chamaeleon I st…
UBVRI Light Curves of 44 Type Ia Supernovae
Saurabh Jha, Robert P. Kirshner, Peter Challis +2
We present UBVRI photometry of 44 type-Ia supernovae (SN Ia) observed from 1997 to 2001 as part of a continuing monitoring campaign at the Fred Lawrence Whipple Observatory of the…
Formation of Structure in Molecular Clouds: A Case Study
F. Heitsch, A. Burkert, L. Hartmann +2
Molecular clouds (MCs) are highly structured and ``turbulent''. Colliding gas streams of atomic hydrogen have been suggested as a possible source of MCs, imprinting the filamentary…
A Spitzer/IRAC Survey of the Orion Molecular Clouds
S. T. Megeath, K. M. Flaherty, J. Hora +9
We present initial results from a survey of the Orion A and B molecular clouds made with the InfraRed Array Camera (IRAC) onboard the Spitzer Space Telescope. This survey encompass…
Wide-Angle Wind Driven Bipolar Outflows: High Resolution Models with Application to Source I of the Becklin-Neugebauer / Kleinmann-Low OMC-I Region
Andrew Cunningham, Adam Frank, Lee Hartmann
We carry out high resolution simulations of the inner regions of a wide angle wind driven bipolar outflow using an Adaptive Mesh Refinement code. Our code follows H-He gas with mol…
IRAC Observations of Taurus Pre-Main Sequence Stars
Lee Hartmann, S. T. Megeath, Lori Allen +5
We present infrared photometry obtained with the IRAC camera on the Spitzer Space Telescope of a sample of 82 pre-main sequence stars and brown dwarfs in the Taurus star-forming re…
The near-infrared size-luminosity relations for Herbig Ae/Be disks
J. D. Monnier, R. Millan-Gabet, R. Billmeier +31
We report the results of a sensitive K-band survey of Herbig Ae/Be disk sizes using the 85-m baseline Keck Interferometer. Targets were chosen to span the maximum range of stellar…
Spitzer Identification of the Least Massive Known Brown Dwarf with a Circumstellar Disk
K. L. Luhman, Paola D'Alessio, Nuria Calvet +5
Using the Infrared Array Camera (IRAC) aboard the Spitzer Space Telescope, we have obtained mid-infrared photometry of the least massive known brown dwarf in the Chamaeleon I star-…
Measuring Accretion in Young Substellar Objects: Approaching the Planetary Mass Regime
J. Muzerolle, K. L. Luhman, C. Briceno +2
We present observations of Halpha emission line profiles taken at Magellan Observatory for a sample of 39 young low-mass stars and brown dwarfs in the Taurus and Chamaeleon I star…