News
Jet-powered turbulence in common envelope evolution (August 2023)
Shlomi Hillel, Ron Schreier, and I conducted a three-dimensional hydrodynamical simulation of a common envelope evolution where a neutron star spirals-in inside the envelope of a red supergiant star and found that the jets shed pairs of vortices in an expanding spiral pattern (paper).
The core degenerate scenario for the type Ia supernova SN 2020eyj (November 2022)
We (Noam Soker & Ealeal Bear) continue to develop the core degenerate scenario for type Ia supernovae (exploding white dwarfs). We argue that the core degenerate scenario can explain the compact helium-rich circumstellar material of SN 2020eyj. See paper here.
Three-dimensional simulations of the jet feedback mechanism in common envelope jets supernovae (June 2022)
We (Shlomi Hillel, Ron Schreier, Noam Soker) conducted three-dimensional hydrodynamical simulations of common envelope jets supernova (CEJSN) events where we assume that a neutron star (NS) launches jets as it orbits inside the outer zones of a red supergiant (RSG) envelope, and find the negative jet feedback coefficient to be ≃ 0.1 – 0.2. See paper here.
Common Envelope Jet Supernova r-process Yields Can Reproduce [Eu/Fe] Abundance Evolution in the Milky Way Galaxy (February 2022)
In a paper by Aldana Grichener, Chiaki Kobayashi and Noam Soker we manage to explain the ratio of Europium to iron ratio [Fe/Fe] versus iron to hydrogen ratio [Fe/H] in our galaxy.
Imprints of the Jittering Jets in the Morphology of a Supernova Remnant (March 2022)
In a paper published March 2022 I identify a point-symmetric structure in the velocity maps at the center of the supernova remnant SNR 0540-69.3, and argue that jittering jets that exploded this core collapse supernova shaped this point-symmetric structure.
Common envelope jets supernovae with a black hole companion as possible high energy neutrino sources (July 2021)
We (Aldana Grichener & Noam Soker) study high energy neutrino emission from relativistic jets launched by a black hole spiraling-in inside the envelope of a red supergiant, and find that such common envelope jets supernovae (CEJSNe) are a potential source for the ~10^15 eV neutrinos detected by IceCube.
Double common envelope jets supernovae (CEJSNe) by triple-star systems (April 2021)
I propose a new type of common envelope jets supernova (CEJSN) events where instead of a single neutron star (NS; or a black hole; BH) a tight binary system of a NS and a main sequence star enters a common envelope evolution (CEE) with a red supergiant (for the paper).
Shaping `Ears’ in planetary nebulae by early jets (December 2020)
We (Muhammad Akashi & Noam Soker) conduct three dimensional hydrodynamical numerical simulations of planetary nebula (PN) shaping and show that jets that precede the ejection of the main PN shell can form the morphological feature of ears.
A Companion Star Launching Jets in the Wind Acceleration Zone of a Giant Star (March 2020)
We study a process where a stellar companion launches jets as it accretes mass from the acceleration zone of the wind of an asymptotic giant branch star (Ron Schreier, Shlomi Hillel & Noam Soker 2020).