924 citations · 3.5k across the 35 of their papers we have counts for
18 papers · 1 filter
Spatial Distribution of Nucleosynthesis Products in Cassiopeia A: Comparison Between Observations and 3D Explosion Models
Patrick Young, Carola I. Ellinger, Francis X. Timmes +10
We examine observed heavy element abundances in the Cassiopeia A supernova remnant as a constraint on the nature of the Cas A supernova. We compare bulk abundances from 1D and 3D e…
Turbulent Convection in Stellar Interiors. II. The Velocity Field
David Arnett, Casey Meakin, P. A. Young
We analyze stellar convection with the aid of 3D hydrodynamic simulations, introducing the turbulent cascade into our theoretical analysis. We devise closures of the Reynolds-decom…
A "Crib Sheet" for Supernova Events
D. Arnett
This paper summarizes our theoretical understanding of supernova events in a "back of the envelope" way. It is intended to aid in the recognition and understanding of those events…
Anelastic and Compressible Simulations of Stellar Oxygen Burning
Casey A. Meakin, David Arnett
In this paper we compare fully compressible (Meakin & Arnett 2006a,b) and anelastic (Kuhlen, Woosley, & Glatzmaier 2003) simulations of stellar oxygen shell burning. It is found th…
Turbulent Convection in Stellar Interiors. I. Hydrodynamic Simulation
Casey A. Meakin, David Arnett
(Abridged) We describe the results of three-dimensional (3D) numerical simulations designed to study turbulent convection in the stellar interiors, and compare them to stellar mixi…
Active Carbon and Oxygen Shell Burning Hydrodynamics
Casey Meakin, David Arnett
We have simulated 2.5 s of the late evolution of a star with full hydrodynamic behavior. We present the first simulations of a multiple-shell burning e…
Constraints on the Progenitor of Cassiopeia A
Patrick A. Young, Chris L. Fryer, Aimee Hungerford +6
We compare a suite of 3D explosion calculations and stellar models incorporating advanced physics with observational constraints on the progenitor of Cassiopeia A. We consider bina…
The Age and Progenitor Mass of Sirius B
James Liebert, Patrick A. Young, David Arnett +2
The Sirius AB binary system has masses that are well determined from many decades of astrometric measurements. Because of the well-measured radius and luminosity of Sirius A, we em…
The Impact of Hydrodynamic Mixing on Supernova Progenitors
Patrick A. Young, Casey Meakin, David Arnett +1
Recent multidimensional hydrodynamic simulations have demonstrated the importance of hydrodynamic motions in the convective boundary and radiative regions of stars to transport of…
Observational Tests and Predictive Stellar Evolution II: Non-standard Models
Patrick A. Young, David Arnett
We examine contributions of second order physical processes to results of stellar evolution calculations amenable to direct observational testing. In the first paper in the series…
A Model For the Formation of High Density Clumps in Proto-Planetary Nebulae
Patrick A. Young, J. L. Highberger, David Arnett +1
The detection of NaCl at large radii in the Egg Nebula, CRL 2688, requires densities of 10^7 - 10^8 cm^-3 in a thick shell of r ~ a few X 10^17 cm. To explain these results, a mech…
Stellar Hydrodynamics in Radiative Regions
Patrick A. Young, Karen A. Knierman, Jane R. Rigby +1
We present an analysis of the response of a radiative region to waves generated by a convective region of the star; this wave treatment of the classical problem of ``overshooting''…
Observational Tests and Predictive Stellar Evolution
P. A. Young, E. E. Mamajek, David Arnett +1
We compare eighteen binary systems with precisely determined radii and masses from 23 to 1.1 M_sol, and stellar evolution models produced with our newly revised code TYCHO. ``Overs…
Further Adventures: Oxygen Burning in a Convective Shell
S. M. Asida, David Arnett
Two dimensional hydrodynamical simulations of convective oxygen burning shell in the presupernova evolution of a 20 solar-mass star are extended to later times. We used the VULCAN…
Explosive Nucleosynthesis: Prospects
David Arnett
Explosive nucleosynthesis is a combination of the nuclear physics of thermonuclear reactions, and the hydrodynamics of the plasma in which the reactions occur. It depends upon the…
Universality in SNIae and the Phillips Relation
David Arnett
The use of supernovae of Type Ia for the determination of accurate distances rests upon the empirical Phillips relation, in which the brightest events are the broadest in time. Imp…
Dynamics of Circumstellar Disks
Andrew F. Nelson, Willy Benz, Fred C. Adams +2
We present a series of 2-dimensional hydrodynamic simulations of massive disks around protostars. We simulate the same physical problem using both a `Piecewise Parabolic Method' (P…
Two-Dimensional Hydrodynamics of Pre-Core Collapse: Oxygen Shell Burning
Grant Bazán, David Arnett
By direct hydrodynamic simulation, using the Piecewise Parabolic Method (PPM) code PROMETHEUS, we study the properties of a convective oxygen burning shell in a SN 1987A progenitor…