Publications

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188 Publications visible to you, out of a total of 188

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

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

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

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

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

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

Abstract

Not specified

Authors: Logan J. Prust, Hila Glanz, Lars Bildsten, Hagai B. Perets, Friedrich K. Röpke

Date Published: 29th Apr 2024

Publication Type: Journal

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