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Massive and luminous O-star atmospheres with winds have been studied primarily using one-dimensional (1D), spherically symmetric, and stationary models. However, observations and theory rather suggest that O-star atmospheres are highly…

Solar and Stellar Astrophysics · Physics 2024-02-02 D. Debnath , J. O. Sundqvist , N. Moens , C. Van der Sijpt , O. Verhamme , L. G. Poniatowski

Vigorous mass loss in the classical Wolf-Rayet (WR) phase is important for the late evolution and final fate of massive stars. We develop spherically symmetric time-dependent and steady-state hydrodynamical models of the radiation-driven…

Solar and Stellar Astrophysics · Physics 2021-03-31 L. G. Poniatowski , J. O. Sundqvist , N. D. Kee , S. P. Owocki , P. Marchant , L. Decin , A. de Koter , L. Mahy , H. Sana

We present results of 3D numerical simulations of magnetically confined, radiatively driven stellar winds of massive stars, conducted using the astrophysical MHD code Pluto, with a focus on understanding the rotational variability of radio…

Solar and Stellar Astrophysics · Physics 2017-12-01 Simon Daley-Yates , Ian Stevens

The magnetic field produced by planets with active dynamos, like the Earth, can exert sufficient pressure to oppose supersonic stellar wind plasmas, leading to the formation of a standing bow shock upstream of the magnetopause, or…

Our understanding of Pulsar Wind Nebulae (PWNe), has greatly improved in the last years thanks to unprecedented high resolution images taken from the HUBBLE, CHANDRA and XMM satellites. The discovery of complex but similar inner features,…

Astrophysics · Physics 2009-06-23 N. Bucciantini

In a companion paper (Paper I) we presented a Co-Evolution Model (CEM) in which to consider the evolution of feedback bubbles driven by massive stars through both stellar winds and ionizing radiation, outlining when either of these effects…

Astrophysics of Galaxies · Physics 2025-05-30 Lachlan Lancaster , Chang-Goo Kim , Jeong-Gyu Kim , Eve C. Ostriker , Greg L. Bryan

By conducting three-dimensional (3D) hydrodynamical simulations we find that jets that a main sequence companion launches as it orbits inside the wind acceleration zone of an asymptotic giant branch (AGB) star can efficiently remove mass…

Solar and Stellar Astrophysics · Physics 2020-03-11 Shlomi Hillel , Ron Schreier , Noam Soker

We present numerical simulations of a 15 solar mass star in a suite of idealised environments in order to quantify the amount of energy transmitted to the interstellar medium (ISM). We include models of stellar winds, UV photoionisation and…

Astrophysics of Galaxies · Physics 2015-06-23 Sam Geen , Joakim Rosdahl , Jeremy Blaizot , Julien Devriendt , Adrianne Slyz

Composite supernova remnants consist of a pulsar wind nebula located inside a shell-type remnant. The presence of a shell has implications on the evolution of the nebula, although the converse is generally not true. The purpose of this…

High Energy Astrophysical Phenomena · Physics 2013-09-25 M. J. Vorster , S. E. S. Ferreira , O. C. de Jager , A. Djannati-Ataï

We present the first detailed three-dimensional (3D) hydrodynamic implicit large eddy simulations of turbulent convection of carbon burning in massive stars. Simulations begin with radial profiles mapped from a carbon burning shell within a…

Solar and Stellar Astrophysics · Physics 2017-08-02 Andrea Cristini , Casey Meakin , Raphael Hirschi , David Arnett , Cyril Georgy , Maxime Viallet

Bow shocks and related density enhancements produced by the winds of massive stars moving through the interstellar medium provide important information regarding the motions of the stars, the properties of their stellar winds, and the…

Solar and Stellar Astrophysics · Physics 2018-04-04 Manisha Shrestha , Hilding R. Neilson , Jennifer L. Hoffman , Richard Ignace

High-mass microquasars may produce jets that will strongly interact with surrounding stellar winds on binary system spatial scales. We study the dynamics of the collision between a mildly relativistic hydrodynamical jet of supersonic nature…

High Energy Astrophysical Phenomena · Physics 2015-05-18 M. Perucho , V. Bosch-Ramon , D. Khangulyan

Neutron stars harbour extremely strong magnetic fields within their solid outer crust. The topology of this field strongly influences the surface temperature distribution, and hence the star's observational properties. In this work, we…

High Energy Astrophysical Phenomena · Physics 2020-11-04 Davide De Grandis , Roberto Turolla , Toby S. Wood , Silvia Zane , Roberto Taverna , Konstantinos N. Gourgouliatos

Bow shock pulsar wind nebulae are a large class of non-thermal synchrotron sources associated to old pulsars, that have emerged from their parent supernova remnant and are directly interacting with the interstellar medium. Within this class…

High Energy Astrophysical Phenomena · Physics 2019-10-16 Barbara Olmi , Niccolò Bucciantini

The interaction of jets in High-Mass X-ray Binaries (HMXBs) with the strong winds driven by the hot companion star in the vicinity of the compact object is fundamental to understand the jet dynamics, non-thermal emission and long-term…

High Energy Astrophysical Phenomena · Physics 2022-05-18 J. López-Miralles , M. Perucho , J. M. Martí , S. Migliari , V. Bosch-Ramon

This paper is a review of some of the recent modeling efforts to improve our understanding of structure formation and evolution of planetary nebulae including their interaction with the interstellar medium. New propositions have been made…

Solar and Stellar Astrophysics · Physics 2015-05-30 Wolfgang Steffen

The role of different stellar feedback mechanisms in giant molecular clouds is not well understood. This is especially true for regions with many interacting clouds as would be found in a galactic spiral arm. In this paper, building on…

Astrophysics of Galaxies · Physics 2022-01-13 Ahmad A. Ali , Thomas J. R. Bending , Clare L. Dobbs

We present new wind models for {\tau} Bo\"otis ({\tau} Boo), a hot-Jupiter-host-star whose observable magnetic cycles makes it a uniquely useful target for our goal of monitoring the temporal variability of stellar winds and their…

Solar and Stellar Astrophysics · Physics 2016-11-15 B. A. Nicholson , A. A. Vidotto , M. Mengel , L. Brookshaw , B. Carter , P. Petit , S. C. Marsden , S. V. Jeffers , R. Fares , the BCool Collaboration

(Abridged) Mass-loss from massive stars leads to the formation of circumstellar wind-blown bubbles surrounding the star, bordered by a dense shell. When the star ends its life in a supernova (SN) explosion, the resulting shock wave will…

Astrophysics · Physics 2009-06-23 Vikram V. Dwarkadas

We calculate the X-ray emission from the shocked fast wind blown by the central stars of planetary nebulae (PNs) and compare with observations. Using spherically symmetric self similar solutions, we calculate the flow structure and X-ray…

Astrophysics · Physics 2009-11-11 Muhammad Akashi , Noam Soker , Ehud Behar
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