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The hydrodynamics of the interaction of pulsar and stellar winds in binary systems harboring a pulsar and its impact on the nonthermal radiation of the binary pulsar PSR B1259-63/SS2883 is discussed. The collision of an ultrarelativistic…

天体物理学 · 物理学 2011-03-10 D. V. Khangulyan , F. A. Aharonian , S. V. Bogovalov , A. V. Koldoba , G. V. Ustyugova

Different hydrodynamic regimes for the gaseous outflows generated by multiple supernovae explosions and stellar winds occurring within compact and massive star clusters are discussed. It is shown that there exists the threshold energy that…

天体物理学 · 物理学 2009-11-11 S. Silich , G. Tenorio-Tagle , C. Munoz-Tunon , J. Palous

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…

太阳与恒星天体物理 · 物理学 2024-02-02 D. Debnath , J. O. Sundqvist , N. Moens , C. Van der Sijpt , O. Verhamme , L. G. Poniatowski

Cool and dense prominences found in the solar atmosphere are known to be partially ionized because of their relative low temperature. In this Letter, we address the long-standing problem of how the neutral component of the plasma in…

太阳与恒星天体物理 · 物理学 2015-06-24 J. Terradas , R. Soler , R. Oliver , J. L. Ballester

By means of self-consistent 3D MHD numerical simulations, we analyze magnetized solar-like stellar winds and their dependence on the plasma-beta parameter. We adopt in our simulations a heating parameter described by gamma, which is…

太阳与恒星天体物理 · 物理学 2011-02-11 A. A. Vidotto , M. Opher , V. Jatenco-Pereira , T. I. Gombosi

We simulate the effects of massive star feedback, via winds and SNe, on inhomogeneous molecular material left over from the formation of a massive stellar cluster. We use 3D hydrodynamic models with a temperature dependent average particle…

星系天体物理 · 物理学 2012-09-25 Julian Pittard , Hazel Rogers

This paper describes the first steps of development of a new multidimensional time implicit code devoted to the study of hydrodynamical processes in stellar interiors. The code solves the hydrodynamical equations in spherical geometry and…

天体物理仪器与方法 · 物理学 2015-05-27 M. Viallet , I. Baraffe , R. Walder

\mu\ Columbae is a prototypical weak-wind O-star for which we have obtained a high-resolution X-ray spectrum with the Chandra LETG/ACIS-S instrument and a low resolution spectrum with Suzaku. This allows us, for the first time, to…

太阳与恒星天体物理 · 物理学 2015-06-11 David P. Huenemoerder , Lidia M. Oskinova , Richard Ignace , Wayne L. Waldron , Helge Todt , Kenji Hamaguchi , Shunji Kitamoto

It is observationally as well as theoretically well established that the winds of hot, massive OB-stars are highly structured on a broad range of spatial scales. This paper first discusses consequences of the small-scale structures…

太阳与恒星天体物理 · 物理学 2012-05-16 J. O. Sundqvist , S. P. Owocki

We modelled the Chandra and RXTE X-ray spectra of the massive binary WR 140 in the framework of the standard colliding stellar wind (CSW) picture. Models with partial electron heating at the shock fronts are a better representation of the…

高能天体物理现象 · 物理学 2020-12-02 Svetozar A. Zhekov

Massive O-type stars lose a significant fraction of their mass through radiation-driven winds, a process that critically shapes their evolution and feedback into the interstellar medium. Accurate predictions of mass-loss rates are essential…

太阳与恒星天体物理 · 物理学 2026-02-19 F. Figueroa-Tapia , J. A. Panei , M. Curé , I. Araya , S. Ekström , A. C. Gormaz-Matamala , R. O. J. Venero , L. S. Cidale

The winds of massive stars are important for their direct impact on the interstellar medium, and for their influence on the final state of a star prior to it exploding as a supernova. However, the dynamics of these winds is understood…

We describe the theory and implementation of a three-dimensional fluid dynamics code which we have developed for calculating the surface geometry and circulation currents in the secondaries of interacting binary systems. The main method is…

天体物理学 · 物理学 2009-11-07 Martin E. Beer , Philipp Podsiadlowski

The outer heliosphere is a dynamic region shaped largely by the interaction between the solar wind and the interstellar medium. While interplanetary magnetic field and plasma observations by the Voyager spacecraft have significantly…

空间物理 · 物理学 2016-12-07 T. K. Kim , N. V. Pogorelov , G. P. Zank , H. A. Elliott , D. J. McComas

The clumping of massive star winds is an established paradigm confirmed by multiple lines of evidence and supported by stellar wind theory. The purpose of this paper is to bridge the gap between detailed models of inhomogeneous stellar…

太阳与恒星天体物理 · 物理学 2015-06-03 L. M. Oskinova , A. Feldmeier , P. Kretschmar

A hydrodynamic model for steady state, spherically-symmetric winds driven by young stellar clusters with an exponential stellar density distribution is presented. Unlike in most previous calculations, the position of the singular point…

宇宙学与河外天体物理 · 物理学 2015-05-30 Sergiy Silich , Gennadiy Bisnovatyi-Kogan , Guillermo Tenorio-Tagle , Sergio Martinez-Gonzalez

We construct effective hydrodynamics for composite particles in (2+1) dimensions carrying a magnetic flux by employing a holographic approach. The hydrodynamics is obtained by perturbation of the dyonic black brane solutions in the…

高能物理 - 理论 · 物理学 2015-07-23 Kyung Kiu Kim , Nakwoo Kim , Yun-Long Zhang

Powerful stellar winds and supernova explosions with intense energy release in the form of strong shock waves can convert a sizeable part of the kinetic energy release into energetic particles. The starforming regions are argued as a…

高能天体物理现象 · 物理学 2015-06-12 A. M. Bykov , P. E. Gladilin , S. M. Osipov

Using a code that employs a self-consistent method for computing the effects of photo-ionization on circumstellar gas dynamics, we model the formation of wind-driven nebulae around massive stars. We take into account changes in stellar…

太阳与恒星天体物理 · 物理学 2022-02-22 Vikram V. Dwarkadas

In the regime of hot stars, winds were not seen as a common thing until the era of UV astronomy. Since we have access to the UV wavelength range, it has become clear that winds are not an exotic phenomenon limited to some special objects,…

太阳与恒星天体物理 · 物理学 2022-11-22 Andreas A. C. Sander