Article (Scientific journals)
Modules for Experiments in Stellar Astrophysics (MESA): Convective Boundaries, Element Diffusion, and Massive Star Explosions
Paxton, B.; Schwab, J.; Bauer, E. B. et al.
2018In Astrophysical Journal Supplement Series, 234 (2)
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Abstract :
[en] We update the capabilities of the software instrument Modules for Experiments in Stellar Astrophysics (MESA) and enhance its ease of use and availability. Our new approach to locating convective boundaries is consistent with the physics of convection, and yields reliable values of the convective-core mass during both hydrogen- and helium-burning phases. Stars with become white dwarfs and cool to the point where the electrons are degenerate and the ions are strongly coupled, a realm now available to study with MESA due to improved treatments of element diffusion, latent heat release, and blending of equations of state. Studies of the final fates of massive stars are extended in MESA by our addition of an approximate Riemann solver that captures shocks and conserves energy to high accuracy during dynamic epochs. We also introduce a 1D capability for modeling the effects of Rayleigh-Taylor instabilities that, in combination with the coupling to a public version of the radiation transfer instrument, creates new avenues for exploring Type II supernova properties. These capabilities are exhibited with exploratory models of pair-instability supernovae, pulsational pair-instability supernovae, and the formation of stellar-mass black holes. The applicability of MESA is now widened by the capability to import multidimensional hydrodynamic models into MESA. We close by introducing software modules for handling floating point exceptions and stellar model optimization, as well as four new software tools MESA- Web, MESA-Docker, pyMESA, and mesastar.org - to enhance MESA's education and research impact. © 2018. The American Astronomical Society. All rights reserved.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Paxton, B.;  Kavli Institute for Theoretical Physics, University of California, Santa Barbara, CA, United States
Schwab, J.;  Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA, United States
Bauer, E. B.;  Department of Physics, University of California, Santa Barbara, CA, United States
Bildsten, L.;  Kavli Institute for Theoretical Physics, University of California, Santa Barbara, CA, United States, Department of Physics, University of California, Santa Barbara, CA, United States
Blinnikov, S.;  M.V. Lomonosov Moscow State University, Sternberg Astronomical Institute, Universitetsky pr., 13, Moscow, Russian Federation, NIC Kurchatov Institute, Institute for Theoretical and Experimental Physics (ITEP), Moscow, Russian Federation, Kavli Institute for the Physics and Mathematics of the Universe (WPI), University of Tokyo, Chiba, Kashiwa, Japan
Duffell, P.;  Department of Astronomy, Theoretical Astrophysics Center, University of California, Berkeley, CA, United States
Farmer, R.;  Anton Pannenkoek Institute for Astronomy, University of Amsterdam, Amsterdam, Netherlands, School of Earth and Space Exploration, Arizona State University, Tempe, AZ, United States
Goldberg, J. A.;  Department of Physics, University of California, Santa Barbara, CA, United States
Marchant, P.;  Department of Physics and Astronomy, Northwestern University, 2145 Sheridan Road, Evanston, IL, United States
Sorokina, E.;  M.V. Lomonosov Moscow State University, Sternberg Astronomical Institute, Universitetsky pr., 13, Moscow, Russian Federation, NIC Kurchatov Institute, Institute for Theoretical and Experimental Physics (ITEP), Moscow, Russian Federation
Thoul, Anne  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie
Townsend, R. H. D.;  Department of Astronomy, University of Wisconsin-Madison, Madison, WI, United States
Timmes, F. X.;  School of Earth and Space Exploration, Arizona State University, Tempe, AZ, United States
More authors (3 more) Less
Language :
English
Title :
Modules for Experiments in Stellar Astrophysics (MESA): Convective Boundaries, Element Diffusion, and Massive Star Explosions
Publication date :
2018
Journal title :
Astrophysical Journal Supplement Series
ISSN :
0067-0049
eISSN :
1538-4365
Publisher :
Institute of Physics Publishing
Volume :
234
Issue :
2
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
ASU - Arizona State University [US-AZ] [US-AZ]
NSF - National Science Foundation [US-VA] [US-VA]
Gordon and Betty Moore Foundation [US-CA] [US-CA]
UCSB - University of California, Santa Barbara [US-CA] [US-CA]
NASA - National Aeronautics and Space Administration [US-DC] [US-DC]
STSCI - Space Telescope Science Institute [US-MD] [US-MD]
NU - Northwestern University [US-IL] [US-IL]
ASRF - Applied Scientific Research Fund [JO]
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