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189 Publications visible to you, out of a total of 189
Dusty Common Envelope Evolution

Abstract (Expand)

We present the first hydrodynamical simulations of common envelope evolution that include the formation of dust and the effect of radiation pressure on dust grains. We performed smoothed particle … hydrodynamics simulations of the CE evolution for two systems made of a 1.7 M⊙ and 3.7 M⊙ AGB star primary with a 0.6 M⊙ binary companion. The results of our calculations indicate that dust formation has a negligible impact on the gas dynamics essentially because dust forms in the already unbound material. The expansion and cooling of the envelope yield very early and highly efficient production of dust. In our formalism, which does not consider dust destruction, almost 100% of the available carbon that is not locked in CO condensates in dust grains. This massive dust production, thus, strongly depends on the envelope mass and composition, in particular, its C/O ratio, and has a considerable impact on the observational aspect of the object, resulting in a photospheric radius that is approximatively one order of magnitude larger than that of a non-dusty system.

Authors: Lionel Siess, Luis C. Bermúdez-Bustamante, Orsola De Marco, Daniel J. Price, Miguel González-Bolívar, Chunliang Mu, Mike Y. M. Lau, Ryosuke Hirai, Taïssa Danilovich

Date Published: 1st Dec 2024

Publication Type: Journal

Singularity-EOS: Performance Portable Equations of State and Mixed Cell Closures

Abstract (Expand)

We present Singularity-EOS, a new performance-portable library for equations of state and related capabilities. Singularity-EOS provides a large set of analytic equations of state, such as the Gruneisen … equation of state, and tabulated equation of state data under a unified interface. It also provides support capabilities around these equations of state, such as Python wrappers, solvers for finding pressure-temperature equilibrium between multiple equations of state, and a unique modifier framework, allowing the user to transform a base equation of state, for example by shifting or scaling the specific internal energy. All capabilities are performance portable, meaning they compile and run on both CPU and GPU for a wide variety of architectures.

Authors: Jonah M. Miller, Daniel A. Holladay, Jeffrey H. Peterson, Christopher M. Mauney, Richard Berger, Anna Pietarila Graham, Karen C. Tsai, Brandon Barker, Alexander Holas, Ann E. Mattsson, Mariam Gogilashvili, Joshua C. Dolence, Chad D. Meyer, Sriram Swaminarayan, Christoph Junghans

Date Published: 1st Nov 2024

Publication Type: Journal

Dust formation in common envelope binary interactions – II: 3D simulations with self-consistent dust formation

Abstract (Expand)

We performed numerical simulations of the common envelope (CE) interaction between thermally-pulsing asymptotic giant branch (AGB) stars of 1.7 M⊙ and 3.7 M⊙, respectively, and a 0.6 M⊙ compact companion. … We use tabulated equations of state to take into account recombination energy. For the first time, formation and growth of dust is calculated explicitly, using a carbon dust nucleation network with a C/O abundance ratio of 2.5 (by number). The first dust grains appear within ∼1–3 yrs after the onset of the CE, forming an optically thick shell at ∼10–20 au, growing in thickness and radius to values of ∼400–500 au over ∼40 yrs, with temperatures around 400 K. Most dust is formed in unbound material, having little effect on mass ejection or orbital evolution. By the end of the simulations, the total dust yield is ∼8.4 × 10−3 M⊙ and ∼2.2 × 10−2 M⊙ for the CE with a 1.7 M⊙ and a 3.7 M⊙ AGB star, respectively, corresponding to a nucleation efficiency close to 100%, if no dust destruction mechanism is considered. Despite comparable dust yields to single AGB stars, in CE ejections the dust forms a thousand times faster, over tens of years as opposed to tens of thousands of years. This rapid dust formation may account for the shift in the infrared of the spectral energy distribution of some optical transients known as luminous red novae. Simulated dusty CEs support the idea that extreme carbon stars and ‘water fountains’ may be objects observed after a CE event.

Authors: Luis C Bermúdez-Bustamante, Orsola De Marco, Lionel Siess, Daniel J Price, Miguel González-Bolívar, Mike Y M Lau, Chunliang Mu, Ryosuke Hirai, Taïssa Danilovich, Mansi M Kasliwal

Date Published: 30th Jul 2024

Publication Type: Journal

SN 2020pvb: A Type IIn-P supernova with a precursor outburst

Abstract

Not specified

Authors: N. Elias-Rosa, S. J. Brennan, S. Benetti, E. Cappellaro, A. Pastorello, A. Kozyreva, P. Lundqvist, M. Fraser, J. P. Anderson, Y. -Z. Cai, T. -W. Chen, M. Dennefeld, M. Gromadzki, C. P. Gutiérrez, N. Ihanec, C. Inserra, E. Kankare, R. Kotak, S. Mattila, S. Moran, T. E. Müller-Bravo, P. J. Pessi, G. Pignata, A. Reguitti, T. M. Reynolds, S. J. Smartt, K. Smith, L. Tartaglia, G. Valerin, T. de Boer, K. Chambers, A. Gal-Yam, H. Gao, S. Geier, P. A. Mazzali, M. Nicholl, F. Ragosta, A. Rest, O. Yaron, D. R. Young

Date Published: 1st Jun 2024

Publication Type: Journal

Type Ia supernova explosion models are inherently multidimensional

Abstract

Not specified

Authors: Rüdiger Pakmor, Ivo R. Seitenzahl, Ashley J. Ruiter, Stuart A. Sim, Friedrich K. Röpke, Stefan Taubenberger, Rebekka Bieri, Stéphane Blondin

Date Published: 1st Jun 2024

Publication Type: Journal

Performance of high-order Godunov-type methods in simulations of astrophysical low Mach number flows

Abstract

Not specified

Authors: G. Leidi, R. Andrassy, W. Barsukow, J. Higl, P. V. F. Edelmann, F. K. Röpke

Date Published: 1st Jun 2024

Publication Type: Journal

Including a luminous central remnant in radiative transfer simulations for Type Iax supernovae

Abstract

Not specified

Authors: F. P. Callan, S. A. Sim, C. E. Collins, L. J. Shingles, F. Lach, F. K. Röpke, R. Pakmor, M. Kromer, S. Srivastav

Date Published: 1st May 2024

Publication Type: Journal

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