Modules for Experiments in Stellar Astrophysics (MESA): Convective Boundaries, Element Diffusion, and Massive Star Explosions

被引：1442

作者：

Paxton, Bill ^{[1
]}

Schwab, Josiah ^{[2
]}

Bauer, Evan B. ^{[3
]}

Bildsten, Lars ^{[1
,3
]}

Blinnikov, Sergei ^{[4
,5
,6
]}

Duffell, Paul ^{[7
,8
]}

Farmer, R. ^{[9
,10
]}

Goldberg, Jared A. ^{[3
]}

Marchant, Pablo ^{[11
]}

Sorokina, Elena ^{[4
,5
]}

Thoul, Anne ^{[12
]}

Townsend, Richard H. D. ^{[13
]}

Timmes, F. X. ^{[10
]}

机构：

[1] Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA

[2] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA

[3] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

[4] Moscow MV Lomonosov State Univ, Sternberg Astron Inst, Univ Sky Pr 13, Moscow 119234, Russia

[5] NIC Kurchatov Inst, ITEP, Moscow 117218, Russia

[6] Univ Tokyo, Kavli Inst Phys & Math Universe WPI, Kashiwa, Chiba 2778583, Japan

[7] Univ Calif Berkeley, Dept Astron, 601 Campbell Hall, Berkeley, CA 94720 USA

[8] Univ Calif Berkeley, Theoret Astrophys Ctr, Berkeley, CA 94720 USA

[9] Univ Amsterdam, Anton Pannenkoek Inst Astron, NL-1090 GE Amsterdam, Netherlands

[10] Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA

[11] Northwestern Univ, Dept Phys & Astron, 2145 Sheridan Rd, Evanston, IL 60208 USA

[12] Univ Liege, Space Sci Technol & Astrophys Res STAR Inst, Allee 6 Aout 19C,Bat B5C, B-4000 Liege, Belgium

[13] Univ Wisconsin, Dept Astron, Madison, WI 53706 USA

来源：

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES | 2018年 / 234卷 / 02期

基金：

美国国家科学基金会;

关键词：

convection; diffusion; hydrodynamics; methods: numerical; stars: evolution; supernovae: general Supporting material: tar.gz files; PULSATIONAL PAIR-INSTABILITY; CORE-COLLAPSE SUPERNOVAE; HELIUM-BURNING MODELS; BLACK-HOLE MERGERS; RAYLEIGH-TAYLOR INSTABILITY; M-CIRCLE-DOT; LIGHT CURVES; NEUTRON-STAR; WHITE-DWARFS; 3-DIMENSIONAL SIMULATIONS;

D O I：

10.3847/1538-4365/aaa5a8

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 M < 8 M-circle dot 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 STELLA 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.

引用

页数：50

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