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I study two intermediate luminosity optical transients (ILOTs) classified as luminous red novae (LRNe) and argue that their modeling with a common envelope evolution (CEE) without jets encounters challenges. LRNe are ILOTs powered by…

太阳与恒星天体物理 · 物理学 2024-05-01 Noam Soker

Choked jets (CJ) have attracted particular attention as potential sources of high-energy cosmic neutrinos. Testing this hypothesis is challenging because of the missing gamma-ray counterpart, hence the identification of other…

高能天体物理现象 · 物理学 2025-06-23 A. Zegarelli , D Guetta , S. Celli , S. Gagliardini , I. Di Palma , I. Bartos

The Red Nova ZTF SLRN-2020 is the third transient event with properties that are compatible with the merger of a planet with a main sequence (or close to) star on a dynamical timescale. While the two first transient events occurred in young…

太阳与恒星天体物理 · 物理学 2023-06-28 Noam Soker

In the last decade a number of rapidly evolving transients have been discovered that are not easily explained by traditional supernovae models. We present optical and UV data on onee such object, SN 2018gep, that displayed a fast rise with…

We present a grid of rotating supergiant models from post-main sequence binary merger products, constructed by the MESA stellar evolution code. We focus on the evolution of these stars until core-collapse, in addition to their rotation,…

高能天体物理现象 · 物理学 2025-09-01 Daichi Tsuna , Jim Fuller , Wenbin Lu

Stripped-envelope supernovae (SNe) are H-poor transients produced at the end of the life of massive stars that previously lost their H-rich envelope. Their progenitors are thought to be donor stars in mass-transferring binary systems, which…

太阳与恒星天体物理 · 物理学 2025-04-25 Andrea Ercolino , Harim Jin , Norbert Langer , Luc Dessart

Rapidly evolving transients, or objects that rise and fade in brightness on timescales two to three times shorter than those of typical Type Ia or Type II supernovae (SNe), have uncertain progenitor systems and powering mechanisms. Recent…

We propose a scenario for the formation of the pulsar with two white dwarfs (WDs) triple system PSR J0337+1715. In our scenario a close binary system is tidally and frictionally destroyed inside the envelope of a massive star that later…

太阳与恒星天体物理 · 物理学 2015-06-23 Efrat Sabach , Noam Soker

We present small-scale three-dimensional hydrodynamical simulations of the evolution of a 0.3Msun main sequence star which launches two perpendicular jets within the envelope of a 0.88Msun red giant. Based on previous large-scale…

高能天体物理现象 · 物理学 2022-05-20 Diego Lopez-Camara , Fabio De Colle , Enrique Moreno Mendez , Sagiv Shiber , Roberto Iaconi

Superluminous supernovae (SLSNe) radiate $\gtrsim 10-100$ times more energy than ordinary stellar explosions, implicating a novel power source behind these enigmatic events. One frequently discussed source, particularly for hydrogen-poor…

高能天体物理现象 · 物理学 2024-10-01 Ore Gottlieb , Brian D. Metzger

We conduct three-dimensional (3D) hydrodynamical simulations of common envelope evolution (CEE) of a neutron star (NS) that launches jets as it spirals in inside the envelope of a rotating red supergiant (RSG) stellar envelope and find that…

高能天体物理现象 · 物理学 2025-05-19 Ron Schreier , Shlomi Hillel , Noam Soker

It is generally believed that the electron-capture reactions happen when the oxygen-neon (ONe) cores grow in masses close to the Chandrasekhar limit, leading to the formation of neutron stars (NSs) via electron-capture supernovae (EC-SNe).…

高能天体物理现象 · 物理学 2026-01-16 Bo Wang , Dongdong Liu , Yunlang Guo , Zhanwen Han

Mounting evidence suggests that Luminous Fast Blue Optical Transients (LFBOTs) are powered by a compact object, launching an asymmetric and fast outflow responsible for the radiation observed in the ultraviolet, optical, infrared, radio,…

高能天体物理现象 · 物理学 2022-09-02 Ersilia Guarini , Irene Tamborra , Raffaella Margutti

Core-collapse supernovae (CCSNe) are the terminal explosions of massive stars. While most massive stars explode as iron-core-collapse supernovae (FeCCSNe), slightly less massive stars explode as electron-capture supernovae (ECSNe), shaping…

高能天体物理现象 · 物理学 2024-02-08 Masato Sato , Nozomu Tominaga , Sergei I. Blinnikov , Marat Sh. Potashov , Takashi J. Moriya , Daichi Hiramatsu

Circumstellar interaction of supernova (SN) ejecta is an essential process in its evolution and observations of SNe have found the signature of circumstellar interaction both in the early and late evolutionary phase of SNe. In this Letter,…

高能天体物理现象 · 物理学 2025-07-14 Tomoki Matsuoka , Keiichi Maeda , Ke-Jung Chen

We propose a scenario where a companion that is about to exit a common envelope evolution (CEE) with a giant star accretes mass from the remaining envelope outside its deep orbit and launches jets that facilitate the removal of the…

太阳与恒星天体物理 · 物理学 2017-09-06 Noam Soker

We find that the convective motion in the envelopes of red supergiant (RSG) stars supplies a non-negligible stochastic angular momentum to the mass that a secondary star accretes in a common envelope evolution (CEE), such that jets that the…

太阳与恒星天体物理 · 物理学 2023-08-08 Noam Dori , Ealeal Bear , Noam Soker

Type Ia supernovae (SNe Ia) arise from the thermonuclear explosion in binary systems involving carbon-oxygen white dwarfs (WDs). The pathway of WDs acquiring mass may produce circumstellar material (CSM). Observing SNe Ia within a few hours…

高能天体物理现象 · 物理学 2023-08-15 Maokai Hu , Lifan Wang , Xiaofeng Wang , Lingzhi Wang

We study the properties of jets launched by a neutron star spiralling inside the envelope and core of a red supergiant. We propose that Thorne-Zytkow objects (TZO) are unlikely to be formed via common envelope (CE) evolution if accretion on…

太阳与恒星天体物理 · 物理学 2015-02-20 Oded Papish , Noam Soker , Inbal Bukay

We report the results of the photometric and spectroscopic monitoring campaign of the transient SN 2007sv. The observables are similar to those of type IIn supernovae, a well-known class of objects whose ejecta interact with pre-existing…