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Related papers: Using Non-Linear Causal Models to Study Aerosol-Cl…

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(Abridged) We study the effects of interstellar clouds on the dynamical and chemical evolution of gas-rich dwarf galaxies. In particular, we focus on two model galaxies similar to IZw18 and NGC1569 in comparison to models in which a smooth…

Astrophysics · Physics 2009-11-13 S. Recchi , G. Hensler

In this paper a LES model with Lagrangian representation of microphysics is used to simulate stratucumulus clouds in idealized 2D set-up based on the VOCALS observations. The general features of the cloud simulated by the model, such as…

Atmospheric and Oceanic Physics · Physics 2012-11-02 M. Andrejczuk , A. Gadian , A. Blyth

This article discusses a potential impact of turbulent velocity fluctuations of the air on a drizzle formation in Cumulus clouds. Two different representations of turbulent velocity fluctuations for a microphysics formulated in a Lagrangian…

Atmospheric and Oceanic Physics · Physics 2015-09-07 M. Andrejczuk , A. Gadian , A. Blyth

Atmospheric aerosols influence the Earth's climate, primarily by affecting cloud formation and scattering visible radiation. However, aerosol-related physical processes in climate simulations are highly uncertain. Constraining these…

The effect of anthropogenic aerosol on the reflectivity of stratocumulus cloud decks through changes in cloud amount is a major uncertainty in climate projections. The focus of this study is the frequently occurring non-precipitating…

Atmospheric and Oceanic Physics · Physics 2020-05-29 Franziska Glassmeier , Fabian Hoffmann , Jill S. Johnson , Takanobu Yamaguchi , Ken S. Carslaw , Graham Feingold

In a series of papers we investigate the effect of collisions between turbulent molecular clouds on their structure, evolution and star formation activity. In this paper we look into the role of the clouds' initial virial ratios. Three…

Astrophysics of Galaxies · Physics 2020-03-16 Tabassum S Tanvir , James E Dale

Aims. We probe the effect of turbulent diffusion on the chemistry at the interface between a cold neutral medium (CNM) cloudlet and the warm neutral medium (WNM). Methods. We perform moving grid, multifluid, 1D, hydrodynamical simulations…

Astrophysics · Physics 2009-11-13 P. Lesaffre , M. Gerin , P. Hennebelle

Momentum deposition by radiation pressure from young, massive stars may help to destroy molecular clouds and unbind stellar clusters by driving large-scale outflows. We extend our previous numerical radiation hydrodynamic study of…

Astrophysics of Galaxies · Physics 2017-12-06 Sudhir Raskutti , Eve C. Ostriker , M. Aaron Skinner

We present results obtained from a set of cosmological hydrodynamic simulations of galaxy clusters, aimed at comparing predictions with observational data on the diversity between cool-core (CC) and non-cool-core (NCC) clusters. Our…

Cosmology and Nongalactic Astrophysics · Physics 2015-11-04 E. Rasia , S. Borgani , G. Murante , S. Planelles , A. M. Beck , V. Biffi , C. Ragone-Figueroa , G. L. Granato , L. K. Steinborn , K. Dolag

Understanding of clouds is instrumental in interpreting current and future spectroscopic observations of exoplanets. Modelling clouds consistently is complex, since it involves many facets of chemistry, nucleation theory, condensation…

Earth and Planetary Astrophysics · Physics 2019-02-13 Chris W. Ormel , Michiel Min

Mineral dust aerosols impact Earth's radiation budget through interactions with clouds, ecosystems, and radiation, which constitutes a substantial uncertainty in understanding past and predicting future climate changes. One of the causes of…

Atmospheric and Oceanic Physics · Physics 2011-01-20 Jasper F. Kok

The presence of clouds between an airshower and a space-based detector can dramatically alter the measured signal characteristics due to absorption and scattering of the photonic signals. Furthermore, knowledge of the cloud cover in the…

Astrophysics · Physics 2007-05-23 John Krizmanic , Pierre Sokolsky , Robert Streitmatter

This study investigates the complex dynamics of AGN (Active Galactic Nucleus) jet-cloud interactions, particularly focusing on the impact of non-thermal particle acceleration on the resulting radiative signatures. We utilize advanced…

High Energy Astrophysical Phenomena · Physics 2023-07-13 Krish Jhurani

The formation mechanism of CO clouds observed with NANTEN2 and Mopra telescope toward the stellar cluster Westerlund 2 is studied by three-dimensional magnetohydrodynamic (MHD) simulations taking into account the interstellar cooling. These…

High Energy Astrophysical Phenomena · Physics 2017-02-27 Yuta Asahina , Tomohisa Kawashima , Naoko Furukawa , Rei Enokiya , Hiroaki Yamamoto , Yasuo Fukui , Ryoji Matsumoto

Dense and cold clouds seem to populate the broad line region surrounding the central black hole in AGNs. These clouds could interact with the AGN jet base and this could have observational consequences. We want to study the gamma-ray…

High Energy Astrophysical Phenomena · Physics 2015-05-19 Anabella T. Araudo , Valenti Bosch-Ramon , Gustavo E. Romero

Mixed-phase clouds, composed of supercooled liquid droplets and ice crystals, play a critical role in weather and climate systems. Their complex microphysical interactions and coupling with turbulence at microscales govern the cloud…

We investigate giant molecular cloud (GMCs) collisions and their ability to induce gravitational instability and thus star formation. This mechanism may be a major driver of star formation activity in galactic disks. We carry out a series…

Astrophysics of Galaxies · Physics 2017-02-01 Benjamin Wu , Jonathan C. Tan , Fumitaka Nakamura , Sven Van Loo , Duncan Christie , David Collins

{It has recently been proposed that giant molecular complexes form at the sites where streams of diffuse warm atomic gas collide at transonic velocities.} {We study the global statistics of molecular clouds formed by large scale colliding…

Astrophysics · Physics 2009-11-13 P. Hennebelle , R. Banerjee , E. Vazquez-Semadeni , R. Klessen , E. Audit

Despite over 35 years of constant satellite-based measurements of cloud, reliable evidence of a long-hypothesized link between changes in solar activity and Earth's cloud cover remains elusive. This work examines evidence of a cosmic ray…

Atmospheric and Oceanic Physics · Physics 2012-11-26 Benjamin A. Laken , Enric Palle , Jasa Calogovic , Eimear M. Dunne

We discuss molecular cloud formation by large-scale supersonic compressions in the diffuse warm neutral medium (WNM). Initially, a shocked layer forms, and within it, a thin cold layer. An analytical model and high-resolution 1D simulations…

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