Accretion in common envelope evolution

Chamandy, Luke; Frank, Adam; Blackman, Eric G.; Carroll-Nellenback, Jonathan; Liu, Baowei; Tu, Yisheng; Nordhaus, Jason; Chen, Zhuo; Peng, Bo

doi:10.1093/mnras/sty1950

Cited by 123 publications

(119 citation statements)

References 81 publications

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“…During the GEE the secondary star increases its mass, almost doubling it (thin blue line in the lower panel). To prevent the expansion of the secondary star as a result of the high mass accretion, the jets must carry out large amounts of energy and to remove high entropy gas from the vicinity of the secondary star (Shiber et al 2016;Chamandy et al 2018). As Abu-Backer et al (2018) already noted, the rotation of the accreting star (which we do not treat here) complicates the accretion process (e.g., Kunitomo et al 2017).…”

Section: Preventing the Cee And Forming Sne Iibmentioning

confidence: 98%

Type IIb supernovae by the grazing envelope evolution

Naiman

Sabach

Gilkis

et al. 2019

Monthly Notices of the Royal Astronomical Society

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We simulate the evolution of binary systems with a massive primary star of 15M where we introduce an enhanced mass loss due to jets that the secondary star might launch, and find that in many cases the enhanced mass loss brings the binary system to experience the grazing envelope evolution (GEE) and form a progenitor of Type IIb supernova (SN IIb). The jets, the Roche lobe overflow (RLOF), and a final stellar wind remove most of the hydrogen-rich envelope, leaving a blue-compact SN IIb progenitor. In many cases without this jet-driven mass loss the system enters a common envelope evolution (CEE) and does not form a SN IIb progenitor. We use the stellar evolutionary code MESA binary and mimic the jet-driven mass loss with a simple prescription and some free parameters. Our results show that the jet-driven mass loss, that some systems have during the GEE, increases the parameter space for stellar binary systems to form SN IIb progenitors. We estimate that the binary evolution channel with GEE contributes about a quarter of all SNe IIb, about equal to the contribution of each of the other three channels, binary evolution without a GEE, fatal CEE (where the secondary star merges with the core of the giant primary star), and the single star channel.

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Section: Preventing the Cee And Forming Sne Iibmentioning

confidence: 98%

Type IIb supernovae by the grazing envelope evolution

Naiman

Sabach

Gilkis

et al. 2019

Monthly Notices of the Royal Astronomical Society

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“…is the total initial mass of the tight binary system. Although high mass accretion rates are possible inside a common envelope (e.g., Chamandy et al (2018)), this is a too high mass accretion rate for low mass main sequence stars, and we assume that the actual mass accretion rate is only about one percent of that rate, namelyṀ 23,…”

Section: Numerical Set-upmentioning

confidence: 99%

Inclined jets inside a common envelope of a triple stellar system

Schreier

Hillel

Soker

2019

Monthly Notices of the Royal Astronomical Society

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We conduct a three-dimensional hydrodynamical simulation to study the interaction of two opposite inclined jets inside the envelope of a giant star, and find that the jets induce many vortexes inside the envelope and that they efficiently remove mass from the envelope and form a very clumpy outflow. We assume that this very rare type of interaction occurs when a tight binary system enters the envelope of a giant star, and that the orbital plane of the tight binary system and that of the triple stellar system are inclined to each other. We further assume that one of the stars of the tight binary system accretes mass and launches two opposite jets and that the jets' axis is inclined to the angular momentum axis of the triple stellar system. The many vortexes that the jets induce along the orbit of the tight binary system inside the giant envelope might play an important role in the common envelope evolution (CEE) by distributing energy in the envelope. The density fluctuations that accompany the vortexes lead to an outflow with many clumps that might facilitate the formation of dust. This outflow lacks any clear symmetry, and it might account for very rare types of 'messy' planetary nebulae and 'messy' nebulae around massive stars. On a broader scope, our study adds to the notion that jets can play important roles in the CEE, and that they can form a rich variety of shapes of nebulae around evolved stars.

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“…Indeed, in a recent paper Chamandy et al (2018) find high accretion rates when they use a subgrid 'valve mechanism' that removes energy, hence reduces pressure, from the vicinity of the accreting companion. Jets can remove energy as in the subgrid prescription of Chamandy et al (2018).…”

mentioning

confidence: 99%

Companion-launched jets and their effect on the dynamics of common envelope interaction simulations

Shiber

Iaconi

Marco

et al. 2019

Monthly Notices of the Royal Astronomical Society

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We conduct three-dimensional hydrodynamic simulations of the common envelope binary interaction and show that if the companion were to launch jets while interacting with the giant primary star's envelope, the jets would remove a substantial fraction of the envelope's gas. We use the setup and numerical code of an earlier common envelope study that did not include jets, with a 0.88-M , 83-R red giant star and a 0.3-M companion. The assumption is that the companion star accretes mass via an accretion disk that is responsible for launching the jets which, in the simulations, are injected numerically. For the first time we conduct simulations that include jets as well as the gravitational energy released by the inspiraling core-companion system. We find that simulations with jets unbind approximately three times as much envelope mass than identical simulations that do not include jets, though the total fraction of unbound gas remains below 50% for these particular simulations. The jets generate high velocity outflows in the polar directions. The jets also increase the final corecompanion orbital separation and lead to a kick velocity of the core-companion binary system. Our results show that, if able to form, jets could play a crucial role in ejecting the envelope and in shaping the outflow.

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Accretion in common envelope evolution

Cited by 123 publications

References 81 publications

Type IIb supernovae by the grazing envelope evolution

Type IIb supernovae by the grazing envelope evolution

Inclined jets inside a common envelope of a triple stellar system

Companion-launched jets and their effect on the dynamics of common envelope interaction simulations

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