News

In a series of papers in 2024, I demonstrated the similarities between the morphologies of core-collapse supernovae and other astrophysical objects known to be shaped by jets. This further strengthens the jittering jets explosion mechanism as the primary explosion mechanism of core-collapse supernovae. The competing neutrino-driven explosion mechanism cannot explain these morphologies. I argue that these morphological similarities rule out the neutrino-driven explosion mechanism. Here, I compare the rim-nozzle asymmetry of supernova 1987A to a cluster of galaxies and two planetary nebulae (upper panel), and a newly discovered core-collapse supernova remnant with a cluster of galaxies and with a planetary nebula (lower panel). The paper is here.  

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).

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. 

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. 

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. 

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).  

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.