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We investigated the evolution of interacting disk galaxies using high-resolution $N$-body/SPH simulations, taking into account the multiphase nature of the interstellar medium (ISM). In our high-resolution simulations, a large-scale…

Gas blown away from galactic disks by supernova (SN) feedback plays a key role in galaxy evolution. We investigate outflows utilizing the solar neighborhood model of our high-resolution, local galactic disk simulation suite, TIGRESS. In our…

星系天体物理 · 物理学 2018-02-21 Chang-Goo Kim , Eve C. Ostriker

We present a three-dimensional, time-dependent, MHD simulation of the short-term interaction between a protoplanetary disk and the stellar corona in a T Tauri system. The simulation includes the stellar magnetic field, self-consistent…

太阳与恒星天体物理 · 物理学 2023-06-07 Ofer Cohen , Cecilia Garraffo , Jeremy Drake , Kristina Monsch , Igor Sokolov , Julian Alvarado-Gomez , Federico Fraschetti

Winds are ubiquitous in galaxies and often feature bubble structures. These wind bubbles are characterized by an external forward shock expanding in the surrounding medium and a wind termination shock separating the cool and fast wind from…

高能天体物理现象 · 物理学 2022-05-13 Enrico Peretti

We include feedback in global hydrodynamic simulations in order to study the star formation properties, and gas structure and dynamics, in models of galactic disks. We extend previous models by implementing feedback in gravitationally bound…

天体物理学 · 物理学 2009-11-13 Rahul Shetty , Eve C. Ostriker

We present simulations of isolated disc galaxies in a realistic environment performed with the Tree-SPMHD-Code Gadget-3. Our simulations include a spherical circum-galactic medium (CGM) surrounding the galactic disc, motivated by…

Stellar-feedback driven outflows are predicted to play a fundamental role in the baryon cycle of low-mass galaxies. However, observational constraints of winds in nearby dwarf galaxies are limited as outflows are transient, intrinsically…

星系天体物理 · 物理学 2020-06-24 Kristen B. W. McQuinn , Liese van Zee , Evan D. Skillman

Many massive stars travel through the interstellar medium at supersonic speeds. As a result they form bow shocks at the interface between the stellar wind. We use numerical hydrodynamics to reproduce such bow shocks numerically, creating…

太阳与恒星天体物理 · 物理学 2015-06-22 Allard Jan van Marle , Leen Decin , Nick Cox , Zakaria Meliani

High-mass gamma-ray binaries are powerful nonthermal galactic sources, some of them hosting a pulsar whose relativistic wind interacts with a likely inhomogeneous stellar wind. So far, modeling these sources including stellar wind…

高能天体物理现象 · 物理学 2022-12-28 E. Kefala , V. Bosch-Ramon

Galactic outflows play an important role in galactic evolution. Despite their importance, a detailed understanding of the physical mechanisms responsible for the driving of these winds is lacking. In an effort to gain more insight into the…

星系天体物理 · 物理学 2017-01-18 Mateusz Ruszkowski , H. -Y. Karen Yang , Ellen Zweibel

Rapid accretion of cold gas plays a crucial role in getting gas into galaxies. It has been suggested that this accretion proceeds along narrow streams that might also directly drive the turbulence in galactic gas, dynamical disturbances,…

宇宙学与河外天体物理 · 物理学 2014-11-13 Philip F. Hopkins , Dusan Keres , Norman Murray

It is commonly adopted that X-rays from O stars are produced deep inside the stellar wind, and transported outwards through the bulk of the expanding matter which attenuates the radiation and affects the shape of emission line profiles. The…

天体物理学 · 物理学 2007-05-23 L. M. Oskinova , A. Feldmeier , W. -R. Hamann

We present SPH simulations of protoclusters including the effects of winds from massive stars. Using a particle-injection method, we investigate the effect of structure close to the wind sources and the short-timescale influence of winds on…

天体物理学 · 物理学 2009-11-13 J. E. Dale , I. A. Bonnell

Stellar feedback in galactic bulges plays an essential role in shaping the evolution of galaxies. To quantify this role and facilitate comparisons with X-ray observations, we conduct 3D hydrodynamical simulations with the adaptive mesh…

星系天体物理 · 物理学 2014-11-18 Shikui Tang , Q. Daniel Wang , Mordecai-Mark Mac Low , M. Ryan Joung

We present initial attempts to include the multi-dimensional nature of radiation transport in hydrodynamical simulations of the small-scale structure that arises from the line-driven instability in hot-star winds. Compared to previous 1D or…

天体物理学 · 物理学 2009-11-10 Luc Dessart , S. P. Owocki

We present a semi-analytic treatment of galactic winds within high resolution, large scale cosmological N-body simulations of a LCDM Universe. The evolution of winds is investigated by following the expansion of supernova driven…

天体物理学 · 物理学 2009-09-25 Serena Bertone , Felix Stoehr , Simon D. M. White

Massive stars are extremely luminous and drive strong winds, blowing a large part of their matter into the galactic environment before they finally explode as a supernova. Quantitative knowledge of massive star feedback is required to…

太阳与恒星天体物理 · 物理学 2016-10-12 Lidia M. Oskinova , Brankica Kubatova , Wolf-Rainer Hamann

Winds from massive stars (> 8 solar masses) result in the formation of wind-blown "bubbles" around these stars. In this paper we study, via two-dimensional numerical hydrodynamic simulations, the onset and growth of turbulence during the…

天体物理学 · 物理学 2009-11-13 Vikram V Dwarkadas

We perform numerical simulations to investigate the stellar wind from interacting binary stars. Our aim is to find analytical formulae describing the outflow structure. In each binary system the more massive star is in the asymptotic giant…

太阳与恒星天体物理 · 物理学 2020-02-19 Luis C. Bermúdez-Bustamante , G. García-Segura , W. Steffen , L. Sabin

Context. Young Stellar Objects (YSOs) are observed to undergo powerful accretion events known as FU Orionis outbursts (FUors). Such events of episodic accretion are now considered to be common during low mass star formation, wherein the…

太阳与恒星天体物理 · 物理学 2025-05-07 Kundan Kadam , Eduard Vorobyov , Peter Woitke , Manuel Güdel