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Various lines of evidence suggest that very massive stars experience extreme mass-loss episodes shortly before they explode as a supernova. Interestingly, several models predict such pre-explosion outbursts. Establishing a causal connection…

We perform a set of two-dimensional, non-relativistic, hydrodynamics simulations for supernova-like explosion associated with stellar core collapse of rotating massive stars to a system of a black hole and a disk connected by the transfer…

高能天体物理现象 · 物理学 2024-02-29 Ludovica Crosato Menegazzi , Sho Fujibayashi , Koh Takahashi , Ayako Ishii

Accurate mass-loss rates are essential for meaningful stellar evolutionary models. For massive single stars with initial masses between 8 - 30\msun the implementation of cool supergiant mass loss in stellar models strongly affects the…

太阳与恒星天体物理 · 物理学 2021-12-01 Emma R. Beasor , Ben Davies , Nathan Smith

Some massive stars likely fail to produce core-collapse supernovae, but these failed supernovae (FSNe) can generate an electromagnetic outburst prior to the disappearance of the star, as the mass lost to neutrinos during the stellar…

高能天体物理现象 · 物理学 2023-08-10 Eric R. Coughlin

We present fully general-relativistic simulations of binary neutron star mergers with a temperature and composition dependent nuclear equation of state. We study the dynamical mass ejection from both quasi-circular and dynamical-capture…

高能天体物理现象 · 物理学 2016-06-21 David Radice , Filippo Galeazzi , Jonas Lippuner , Luke F. Roberts , Christian D. Ott , Luciano Rezzolla

The activity of massive stars approaching core-collapse can strongly affect the appearance of the star and its subsequent supernova. Late-phase convective nuclear burning generates waves that propagate toward the stellar surface, heating…

高能天体物理现象 · 物理学 2023-05-10 Shing-Chi Leung , Jim Fuller

[Abridged] Context: Radiation-driven mass loss plays a key role in the life-cycles of massive stars. However, basic predictions of such mass loss still suffer from significant quantitative uncertainties. Aims: We develop new…

太阳与恒星天体物理 · 物理学 2020-01-08 J. O. Sundqvist , R. Björklund , J. Puls , F. Najarro

This is the second in a series of papers presenting the results of fully general relativistic simulations of stellar tidal disruptions in which the stars' initial states are realistic main-sequence models. In the first paper (Paper I), we…

高能天体物理现象 · 物理学 2020-12-02 Taeho Ryu , Julian Krolik , Tsvi Piran , Scott C. Noble

The proximity to the Eddington luminosity has been attributed as the cause of several observed effects in massive stars. Computationally, if the luminosity carried through radiation exceeds the local Eddington luminosity in the low-density…

太阳与恒星天体物理 · 物理学 2022-12-14 Poojan Agrawal , Simon Stevenson , Dorottya Szécsi , Jarrod Hurley

Classical Wolf-Rayet (WR) stars mark an important stage in the late evolution of massive stars. As hydrogen-poor massive stars, these objects have lost their outer layers, while still losing further mass through strong winds indicated by…

太阳与恒星天体物理 · 物理学 2022-12-07 Andreas A. C. Sander , Jorick S. Vink , Erin R. Higgins , Tomer Shenar , Wolf-Rainer Hamann , Helge Todt

Recent claims in the literature (Bressan, Chiosi & Fagotto 1994) that the epoch describing the onset of galactic winds in spheroidal star systems has been severely overestimated in the past, due to the neglect of energy deposited in the…

天体物理学 · 物理学 2016-06-08 Brad K. Gibson

Aims: We investigate the influence of high-energy stellar radiation at close-in orbits on atmospheric mass loss during stellar evolution of a G-type star. Methods: High-energy stellar luminosity varies over a wide range for G field stars.…

天体物理学 · 物理学 2007-10-19 T. Penz , G. Micela , H. Lammer

Solar flares are often accompanied by filament/prominence eruptions, sometimes leading to coronal mass ejections (CMEs). By analogy, we expect that stellar flares are also associated with stellar CMEs whose properties are essential to know…

太阳与恒星天体物理 · 物理学 2022-11-11 Kosuke Namekata , Hiroyuki Maehara , Satoshi Honda , Yuta Notsu , Daisaku Nogami , Kazunari Shibata

We examine the effects of gas expulsion on initially sub-structured and out-of-equilibrium star clusters. We perform $N$-body simulations of the evolution of star clusters in a static background potential before removing that potential to…

太阳与恒星天体物理 · 物理学 2015-05-27 Rory Smith , Michael Fellhauer , Simon Goodwin , Paulina Assmann

Evolved massive stars are known to undergo outflow with high mass ejections, resulting in the loss of a substantial portion of their envelopes. One proposed mechanism driving these events is the release or deposition of energy within the…

太阳与恒星天体物理 · 物理学 2026-02-03 Bhawna Mukhija , Amit Kashi

The phase-transition induced collapse of a neutron star to a more compact configuration (typically a ``strange'' star) and the subsequent core bounce is often invoked as a model for gamma-ray bursts. We present the results of numerical…

天体物理学 · 物理学 2016-02-17 C. L. Fryer , S. E. Woosley

If interstellar objects originate in protoplanetary disks, they can be used to calibrate the fraction of mass that such disks eject. The discoveries of interstellar objects 1I/`Oumuamua and 2I/Borisov, taken together with rogue planets…

地球与行星天体物理 · 物理学 2021-09-01 Amir Siraj , Abraham Loeb

We examine the importance of secular stellar mass loss for fueling ongoing star formation in disk galaxies during the late stages of their evolution. For a galaxy of a given stellar mass, we calculate the total mass loss rate of its entire…

星系天体物理 · 物理学 2015-03-17 Samuel N. Leitner , Andrey V. Kravtsov

By extending our self-consistent MHD simulations for the solar wind, we study the evolution of stellar winds of solar-type stars from early main sequence stage to red giant phase. Young solar-type stars are active and the mass loss rates…

太阳与恒星天体物理 · 物理学 2015-06-12 Takeru K. Suzuki

Stellar energy loss is a sensitive probe of light, weakly coupled dark sectors, including ones containing millicharged particles (MCPs). The emission of MCPs can affect stellar evolution, and therefore can alter the observed properties of…

高能物理 - 唯象学 · 物理学 2023-09-14 Audrey Fung , Saniya Heeba , Qinrui Liu , Varun Muralidharan , Katelin Schutz , Aaron C. Vincent