118 citations · 231 across the 20 of their papers we have counts for
20 papers
Dust and Gas Transport in Substructured Nonideal MHD Wind-Launching Disks with Embedded Planets
Chun-Yen Hsu, Zhi-Yun Li, Xiao Hu +2
Radial dust transport in protoplanetary disks is a key process shaping planet formation and disk chemistry. We investigate how this transport, along with gas transport, is regulate…
Modeling YSO Jets in 3D III: Dependence of Accretion and Jet Properties on Stellar Magnetospheric Field Strength and Rotation
Yisheng Tu, Zhi-Yun Li, Zhaohuan Zhu +1
Observations of Young Stellar Objects (YSOs) systems reveal a wide diversity of jet properties, from well-collimated bipolar jets to uni-polar jets and systems with no detectable j…
A New Method of Measuring Magnetic Field Strength in Highly Structured Protostellar Envelopes
Yisheng Tu, Xiaoyuan Yang, Zhi-Yun Li
Magnetic fields play a fundamental role in protostellar collapse and disk formation, yet direct measurements of magnetic field strength in deeply embedded protostellar envelopes re…
MHD Simulations of Strongly Magnetized HII Region Evolution: Evidence for Ionized Gas Filamentation
Samuel Crowe, Yisheng Tu, Zhi-Yun Li +2
Recent JWST observations of HII regions in the Central Molecular Zone have shown a highly filamentary morphology distinct from HII regions in other parts of the galaxy. We present…
Modeling YSO Jets in 3D II: Accretion-Fed, Star-Anchored Poynting Jets in the Low-Density Polar Cavity Powered by Disk-Magnetosphere Interaction
Yisheng Tu, Zhi-Yun Li, Zhaohuan Zhu +2
The origin of jets in young stellar objects (YSOs) remains a subject of active investigation. We present a 3D magnetohydrodynamic simulation of jet launching in YSOs, focusing on t…
Dust Concentration Via Coupled Vertical Settling and Radial Migration in Substructured Non-Ideal MHD Discs and Early Planet Formation
Chun-Yen Hsu, Zhi-Yun Li, Yisheng Tu +2
We investigate the dynamics of dust concentration in actively accreting, substructured, non-ideal MHD wind-launching disks using 2D and 3D simulations incorporating pressureless du…
Rossby Wave Instability and Substructure Formation in 3D Non-Ideal MHD Wind-Launching Disks
Chun-Yen Hsu, Zhi-Yun Li, Yisheng Tu +2
Rings and gaps are routinely observed in the dust continuum emission of protoplanetary discs (PPDs). How they form and evolve remains debated. Previous studies have demonstrated th…
YSO Jets Magnetocentrifugally Driven by Reconnecting Atmospheric Avalanche Accretion Streams Above Inner Circumstellar Disks
Yisheng Tu, Zhi-Yun Li, Zhaohuan Zhu +2
Fast, collimated jets are ubiquitous features of young stellar objects (YSOs). They are generally thought to be powered by disk accretion, but the details are debated. Through 2D (…
Fragmentation of Dense Rotation-Dominated Structures Fed by Collapsing Gravomagneto-Sheetlets and Origin of Misaligned 100 au-Scale Binaries and Multiple Systems
Yisheng Tu, Zhi-Yun Li, Zhaohuan Zhu +1
The majority of stars are in binary/multiple systems. How such systems form in turbulent, magnetized cores of molecular clouds in the presence of non-ideal MHD effects remains rela…
Modeling CN Zeeman Effect Observations of the Envelopes of a Low-Mass Protostellar Disk and a Massive Protostar
Renato Mazzei, Zhi-Yun Li, Che-Yu Chen +3
We use the POLARIS radiative transfer code to produce simulated circular polarization Zeeman emission maps of the CN molecular line transition for two types of protoste…
Protostellar Disks Fed By Dense Collapsing Gravo-Magneto-Sheetlets
Yisheng Tu, Zhi-Yun Li, Ka Ho Lam +2
Stars form from the gravitational collapse of turbulent, magnetized molecular cloud cores. Our non-ideal MHD simulations reveal that the intrinsically anisotropic magnetic resistan…
How negative feedback and the ambient environment limit the influence of recombination in common envelope evolution
Luke Chamandy, Jonathan Carroll-Nellenback, Eric G. Blackman +5
We perform 3D hydrodynamical simulations to study recombination and ionization during the common envelope (CE) phase of binary evolution, and develop techniques to track the ionic…
Grain Growth During Protostellar Disk Formation
Yisheng Tu, Zhi-Yun Li, Ka Ho Lam
Recent observations indicate that mm/cm-sized grains may exist in the embedded protostellar disks. How such large grains grow from the micron size (or less) in the earliest phase o…
Centrifugal Barrier and Super-Keplerian Rotation in Protostellar Disk Formation
Dylan C. Jones, Ka Ho Lam, Zhi-Yun Li +1
With the advent of ALMA, it is now possible to observationally constrain how disks form around deeply embedded protostars. In particular, the recent ALMA C3H2 line observations of…
Common Envelope Evolution on the Asymptotic Giant Branch: Unbinding within a Decade?
Luke Chamandy, Eric G. Blackman, Adam Frank +2
Common envelope (CE) evolution is a critical but still poorly understood progenitor phase of many high-energy astrophysical phenomena. Although 3D global hydrodynamic CE simulation…
Fields and Characteristic Impedances of Dipole and Quadrupole Cylindrical Stripline Kickers
Tanaji Sen, Yisheng Tu, Jean-Francois Ostiguy
We present semi-analytical methods for calculating the electromagnetic field in dipole and quadrupole stripline kickers with curved plates of infinitesimal thickness. Two different…
How Drag Force Evolves in Global Common Envelope Simulations
Luke Chamandy, Eric G. Blackman, Adam Frank +3
We compute the forces, torque and rate of work on the companion-core binary due to drag in global simulations of common envelope (CE) evolution for three different companion masses…
Energy Budget and Core-Envelope Motion in Common Envelope Evolution
Luke Chamandy, Yisheng Tu, Eric G. Blackman +4
We analyze a 3D hydrodynamic simulation of common envelope evolution to understand how energy is transferred between various forms and whether theory and simulation are mutually co…
Accretion in Common Envelope Evolution
Luke Chamandy, Adam Frank, Eric G. Blackman +6
Common envelope evolution (CEE) occurs in some binary systems involving asymptotic giant branch (AGB) or red giant branch (RGB) stars, and understanding this process is crucial for…
Accretion in common envelope evolution
Luke Chamandy, Adam Frank, Eric G. Blackman +6
Common envelope evolution (CEE) is presently a poorly understood, yet critical, process in binary stellar evolution. Characterizing the full 3D dynamics of CEE is difficult in part…