Search Results - "Bildsten, Lars"
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Inferring Explosion Properties from Type II-Plateau Supernova Light Curves
Published in The Astrophysical journal (01-07-2019)“…We present advances in modeling Type IIP supernovae (SNe IIP) using MESA for evolution to shock breakout coupled with STELLA for generating light and radial…”
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2
Thermal runaway during the evolution of ONeMg cores towards accretion-induced collapse
Published in Monthly notices of the Royal Astronomical Society (21-10-2015)“…We study the evolution of degenerate electron cores primarily composed of the carbon burning products 16O, 20Ne, and 24Mg (hereafter ONeMg cores) that are…”
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ASTEROSEISMIC SIGNATURES OF EVOLVING INTERNAL STELLAR MAGNETIC FIELDS
Published in The Astrophysical journal (10-06-2016)“…ABSTRACT Recent asteroseismic analyses indicate the presence of strong (B 105 G) magnetic fields in the cores of many red giant stars. Here, we examine the…”
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MAGNETAR-DRIVEN SHOCK BREAKOUT AND DOUBLE-PEAKED SUPERNOVA LIGHT CURVES
Published in The Astrophysical journal (10-04-2016)“…ABSTRACT The light curves of some luminous supernovae are suspected to be powered by the spindown energy of a rapidly rotating magnetar. Here we describe a…”
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ANGULAR MOMENTUM TRANSPORT WITHIN EVOLVED LOW-MASS STARS
Published in The Astrophysical journal (10-06-2014)“…Asteroseismology of 1.0-2.0 M sub([middot in circle]) red giants by the Kepler satellite has enabled the first definitive measurements of interior rotation in…”
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CARBON SHELL OR CORE IGNITIONS IN WHITE DWARFS ACCRETING FROM HELIUM STARS
Published in The Astrophysical journal (10-04-2016)“…ABSTRACT White dwarfs accreting from helium stars can stably burn at the accreted rate and avoid the challenge of mass loss associated with unstable helium…”
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The importance of Urca-process cooling in accreting ONe white dwarfs
Published in Monthly notices of the Royal Astronomical Society (01-12-2017)“…Abstract We study the evolution of accreting oxygen–neon (ONe) white dwarfs (WDs), with a particular emphasis on the effects of the presence of the…”
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The Asteroseismological Richness of RCB and dLHdC Stars
Published in The Astrophysical journal (01-02-2024)“…Abstract RCB stars are L ≈ 10 4 L ⊙ solar-mass objects that can exhibit large periods of extinction from dust ejection episodes. Many exhibit semi-regular…”
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Dynamical He Flashes in Double White Dwarf Binaries
Published in The Astrophysical journal (01-07-2023)“…Abstract The detonation of an overlying helium layer on a 0.8–1.1 M ⊙ carbon–oxygen (CO) white dwarf (WD) can detonate the CO WD and create a thermonuclear…”
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Asteroseismology can reveal strong internal magnetic fields in red giant stars
Published in Science (American Association for the Advancement of Science) (23-10-2015)“…Internal stellar magnetic fields are inaccessible to direct observations, and little is known about their amplitude, geometry, and evolution. We demonstrate…”
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Modules for Experiments in Stellar Astrophysics (MESA): Time-dependent Convection, Energy Conservation, Automatic Differentiation, and Infrastructure
Published in The Astrophysical journal. Supplement series (01-03-2023)“…Abstract We update the capabilities of the open-knowledge software instrument Modules for Experiments in Stellar Astrophysics ( MESA ). The new auto _ diff…”
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Accretion-induced Collapse from Helium Star + White Dwarf Binaries
Published in The Astrophysical journal (10-07-2017)“…Accretion-induced collapse (AIC) occurs when an O/Ne white dwarf (WD) grows to nearly the Chandrasekhar mass ( ), reaching central densities that trigger…”
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13
Outbursts of luminous blue variable stars from variations in the helium opacity
Published in Nature (London) (01-09-2018)“…Luminous blue variables are massive, evolved stars that exhibit large variations in luminosity and size on timescales from months to years, with high…”
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Giant Planet Engulfment by Evolved Giant Stars: Light Curves, Asteroseismology, and Survivability
Published in The Astrophysical journal (01-06-2023)“…Abstract About ten percent of Sun-like (1–2 M ⊙ ) stars will engulf a 1–10 M J planet as they expand during the red giant branch (RGB) or asymptotic giant…”
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LOCAL RADIATION HYDRODYNAMIC SIMULATIONS OF MASSIVE STAR ENVELOPES AT THE IRON OPACITY PEAK
Published in The Astrophysical journal (01-11-2015)“…ABSTRACT We perform three-dimensional radiation hydrodynamic simulations of the structure and dynamics of the radiation-dominated envelopes of massive stars at…”
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THE LONG-TERM EVOLUTION OF DOUBLE WHITE DWARF MERGERS
Published in The Astrophysical journal (20-03-2012)“…In this paper, we present a model for the long-term evolution of the merger of two unequal mass C/O white dwarfs (WDs). After the dynamical phase of the…”
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Unstable Helium Shell Burning on Accreting White Dwarfs
Published in The Astrophysical journal (10-07-2009)Get full text
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18
Numerical Simulations of Convective Three-dimensional Red Supergiant Envelopes
Published in The Astrophysical journal (01-04-2022)“…Abstract We explore the three-dimensional properties of convective, luminous ( L ≈ 10 4.5 –10 5 L ⊙ ), hydrogen-rich envelopes of red supergiants (RSGs) based…”
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Shocking and Mass Loss of Compact Donor Stars in Type Ia Supernovae
Published in The Astrophysical journal (01-09-2024)“…Abstract Type Ia supernovae arise from thermonuclear explosions of white dwarfs accreting from a binary companion. Following the explosion, the surviving donor…”
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CIRCUMSTELLAR SHELL FORMATION IN SYMBIOTIC RECURRENT NOVAE
Published in The Astrophysical journal (20-12-2012)“…We present models of spherically symmetric recurrent nova shells interacting with circumstellar material (CSM) in a symbiotic system composed of a red giant…”
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