568 citations · 21.9k across the 202 of their papers we have counts for
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Effects of Magnetic Field Strength and Orientation on Molecular Cloud Formation
F. Heitsch, J. M. Stone, L. W. Hartmann
We present a set of numerical simulations addressing the effects of magnetic field strength and orientation on the flow-driven formation of molecular clouds. Fields perpendicular t…
Non-steady Accretion in Protostars
Zhaohuan Zhu, Lee Hartmann, Charles Gammie
Observations indicate that mass accretion rates onto low-mass protostars are generally lower than the rates of infall to their disks; this suggests that much of the protostellar ma…
Rapid Molecular Cloud and Star Formation: Mechanisms and Movies
Fabian Heitsch, Lee Hartmann
We demonstrate that the observationally inferred rapid onset of star formation after parental molecular clouds have assembled can be achieved by flow-driven cloud formation of atom…
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…
Fragmentation of Shocked Flows: Gravity, Turbulence and Cooling
F. Heitsch, L. Hartmann, A. Burkert +1
The observed rapid onset of star formation in molecular clouds requires rapid formation of dense fragments which can collapse individually before being overtaken by global gravitat…