251 citations · 4.4k across the 56 of their papers we have counts for
9 papers · 1 filter
How do T Tauri stars accrete
Lee Hartmann, Jaehan Bae
We conjecture that observed protoplanetary disc accretion rates may be explained with low viscosities which could be the result of hydrodynamic turbulence. We show that viscosities…
Kinematics and Structure of Star-forming Regions: Insights from Cold Collapse Models
Aleksandra Kuznetsova, Lee Hartmann, Javier Ballesteros-Paredes
The origin of the observed morphological and kinematic substructure of young star forming regions is a matter of debate. We offer a new analysis of data from simulations of globall…
Are fibres in molecular cloud filaments real objects?
Manuel Zamora-Avilés, Javier Ballesteros-Paredes, Lee W. Hartmann
We analyse the morphology and kinematics of dense filamentary structures produced in a numerical simulation of a star--forming cloud of $1.4 \times 10^4 \, \Msun$ evolving under th…
Disk evolution and the fate of water
Lee Hartmann, Fred Ciesla, Oliver Gressel +1
We review the general theoretical concepts and observational constraints on the distribution and evolution of water vapor and ice in protoplanetary disks, with a focus on the Solar…
Kinematics of the Optically Visible YSOs Toward the Orion B Molecular Cloud
Marina Kounkel, Lee Hartmann, Mario Mateo +2
We present results from high resolution optical spectra toward 66 young stars in the Orion B molecular cloud to study their kinematics and other properties. Observations of the H$α…
On the formation of multiple concentric rings and gaps in protoplanetary disks
Jaehan Bae, Zhaohuan Zhu, Lee Hartmann
As spiral waves driven by a planet in a gaseous disk steepen into a shock, they deposit angular momentum, opening a gap in the disk. This has been well studied using both linear th…