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Physical and chemical properties of the interstellar medium (ISM) at sub-galactic ($\sim$kpc) scales play an indispensable role in controlling the ability of gas to form stars. As part of the SMAUG (Simulating Multiscale Astrophysics to…

We present a detailed study of the elemental abundances distribution of the intracluster medium (ICM) within the A3266 cluster using {\it XMM-Newton} observations. This analysis uses EPIC-pn data, including a new energy scale calibration,…

高能天体物理现象 · 物理学 2025-06-04 E. Gatuzz , J. Sanders , A. Liu , A. Fabian , C. Pinto , H. Russell , D. Eckert , S. Walker , J. ZuHone , R. Mohapatra

We use three-dimensional hydrodynamic numerical simulations to study phase transformations occurring in a clumpy interstellar gas exposed to time-dependent volumetric heating. To mimic conditions in the Galactic interstellar medium, we take…

天体物理学 · 物理学 2009-11-07 Alexei G. Kritsuk , Michael L. Norman

Stellar feedback drives the circulation of matter from the disk to the halo of galaxies. We perform three-dimensional magnetohydrodynamic simulations of a vertical column of the interstellar medium with initial conditions typical of the…

We derive and analyze a class of spherically symmetric cosmological models whose source is an interactive mixture of inhomogeneous cold dark matter (DM) and a generic homogeneous dark energy (DE) fluid. If the DE fluid corresponds to a…

天体物理学 · 物理学 2009-11-10 Roberto A Sussman , Israel Quiros , Osmel Martin Gonzalez

While the evolution of superbubbles driven by clustered supernovae has been studied by numerous authors, the resulting radial momentum yield is uncertain by as much as an order of magnitude depending on the computational methods and assumed…

星系天体物理 · 物理学 2019-02-07 Eric S. Gentry , Mark R. Krumholz , Piero Madau , Alessandro Lupi

A volume limited and absolute magnitude limited sample of A-F type dwarfs within 125 parsecs of the Sun is searched for inhomogeneities in the density- velocity space, expecting signatures of the cluster evaporation, phase mixing and…

天体物理学 · 物理学 2016-08-30 E. Chereul , M. Crézé , O. Bienaymé

The slow flow of amorphous solids exhibits striking heterogeneities: swift localised particle rearrangements take place in the midst of a more or less homogeneously deforming medium. Recently, experimental as well as numerical work has…

软凝聚态物质 · 物理学 2014-03-04 Alexandre Nicolas , Joerg Rottler , Jean-Louis Barrat

The interstellar medium (ISM) is subject, on one hand, to heating and cooling processes that tend to segregate it into distinct phases due to thermal instability (TI), and on the other, to turbulence-driving mechanisms that tend to produce…

星系天体物理 · 物理学 2009-02-06 Enrique Vazquez-Semadeni

We use numerical simulations to analyze the evolution and properties of superbubbles (SBs), driven by multiple supernovae (SNe), that propagate into the two-phase (warm/cold), cloudy interstellar medium (ISM). We consider a range of mean…

星系天体物理 · 物理学 2017-01-04 Chang-Goo Kim , Eve C. Ostriker , Roberta Raileanu

The existence of substellar cold H2 globules in planetary nebulae and the mere existence of comets suggest that the physics of cold interstellar gas might be much richer than usually envisioned. We study the case of a cold gaseous medium in…

星系天体物理 · 物理学 2016-08-08 Andreas Füglistaler , Daniel Pfenniger

We introduce TIGRESS, a novel framework for multi-physics numerical simulations of the star-forming interstellar medium (ISM) implemented in the Athena MHD code. The algorithms of TIGRESS are designed to spatially and temporally resolve key…

星系天体物理 · 物理学 2017-09-20 Chang-Goo Kim , Eve C. Ostriker

We present multi-epoch spectropolarimetry and spectra for a sample of 14 Type IIn supernovae (SNe IIn). We find that after correcting for likely interstellar polarization, SNe IIn commonly show intrinsic continuum polarization of 1--3% at…

The interstellar medium (ISM) has a multiphase structure characterized by gas, dust and molecules. The gas can be found in different charge states: neutral, low-ionized (warm) and high-ionized (hot). It is possible to probe the multiphase…

高能天体物理现象 · 物理学 2013-02-19 C. Pinto , J. S. Kaastra , E. Costantini , F. Verbunt

Particle-In-Cell (kinetic) simulations of shear Alfv\'en wave interaction with one dimensional, across the uniform magnetic field, density inhomogeneity (phase mixing) in collisionless plasma were performed for the first time. As a result a…

天体物理学 · 物理学 2009-11-10 David Tsiklauri , Jun-Ichi Sakai , Shinji Saito

High-cadence surveys of the sky are revealing that a large fraction of red-supergiant (RSG) stars, which are progenitors of Type II-Plateau (II-P) supernovae (SNe), explode within circumstellar material (CSM). Such SNe II-P/CSM exhibit…

高能天体物理现象 · 物理学 2025-04-16 Luc Dessart , Douglas C. Leonard , Sergiy S. Vasylyev , D. John Hillier

We introduce the LYRA project, a new high resolution galaxy formation model built within the framework of the cosmological hydro-dynamical moving mesh code AREPO. The model resolves the multi-phase interstellar medium down to 10 K. It forms…

星系天体物理 · 物理学 2021-02-26 Thales A. Gutcke , Rüdiger Pakmor , Thorsten Naab , Volker Springel

The wavelength range 912-2000A (hereafter far-UV) provides access to absorption lines of the interstellar medium (ISM), circumgalactic medium (CGM), and intergalactic medium (IGM) in phases spanning a wide range of ionization, density,…

星系天体物理 · 物理学 2019-03-19 V. Lebouteiller , D. Kunth , J. Roman-Duval , P. Richter , C. Gry , B. James , A. Aloisi

We use high-resolution maps of the molecular interstellar medium (ISM) in the centres of eighty-six nearby galaxies from the millimetre-Wave Interferometric Survey of Dark Object Masses (WISDOM) and Physics at High Angular Resolution in…

Using the Hubble Space Telescope ACS imaging of the GOODS North and South fields during Cycles 11, 12, and 13, we derive empirical constraints on the delay-time distribution function for type Ia supernovae. We extend our previous analysis…

宇宙学与河外天体物理 · 物理学 2015-05-18 Louis-Gregory Strolger , Tomas Dahlen , Adam G. Riess