English
Related papers

Related papers: Cloudy_3D, a new pseudo-3D photoionization code

200 papers

Non-ideal MHD effects are thought to be a crucial component of the star-formation process. Numerically, several complications render the study of non-ideal MHD effects in 3D simulations extremely challenging and hinder our efforts of…

Astrophysics of Galaxies · Physics 2025-02-12 E. Agianoglou , A. Tritsis , K. Tassis

We have computed line emission cooling rates for the main cooling species in models of interstellar molecular clouds. The models are based on numerical simulations of super-sonic magneto-hydrodynamic (MHD) turbulence. Non-LTE radiative…

Astrophysics · Physics 2009-11-06 M. Juvela , P. Padoan , A Nordlund

Reconstructing the 3D shape of an object from a single RGB image is a long-standing and highly challenging problem in computer vision. In this paper, we propose a novel method for single-image 3D reconstruction which generates a sparse…

Computer Vision and Pattern Recognition · Computer Science 2023-02-24 Luke Melas-Kyriazi , Christian Rupprecht , Andrea Vedaldi

Future quantum technology relies crucially on building quantum networks with high fidelity. To achieve this challenging goal, it is of utmost importance to connect single quantum systems in a way such that their emitted single-photons…

We develop a general method for the self consistent calculation of the hydrodynamics of an astrophysical object irradiated by a radiation field with an arbitrary strength and spectral energy distribution (SED). Using the XSTAR…

High Energy Astrophysical Phenomena · Physics 2017-03-22 Sergei Dyda , Randall Dannen , Tim Waters , Daniel Proga

We have constructed a grid of photoionization models of spherical, elliptical and bipolar planetary nebulae. Assuming different velocity fields, we have computed line profiles corresponding to different orientations, slit sizes and…

Astrophysics · Physics 2008-02-01 C. Morisset , G. Stasinska

The understanding of astronomical nebulae is based on observational data (images, spectra, 3D data-cubes) and theoretical models. In this review, I present my very biased view on photoionization modeling of planetary nebulae, focusing on 1D…

Astrophysics of Galaxies · Physics 2017-11-15 Christophe Morisset

Our understanding of physical processes in Photodissociation regions or Photon Dominated Regions (PDRs) largely depends on the ability of spectral synthesis codes to reproduce the observed infrared emission-line spectrum. In this paper, we…

Astrophysics · Physics 2009-11-13 N. P. Abel , P. A. M. van Hoof , G. Shaw , G. J. Ferland , T. Elwert

Flow-based generative models have highly desirable properties like exact log-likelihood evaluation and exact latent-variable inference, however they are still in their infancy and have not received as much attention as alternative…

Computer Vision and Pattern Recognition · Computer Science 2020-04-06 Albert Pumarola , Stefan Popov , Francesc Moreno-Noguer , Vittorio Ferrari

In this contribution we discuss about numerical modeling of nebulae. In particular we emphasize on the dynamical evolution of an HII region and the chemical structure of a Photodissociation region. We do this using the Smoothed Particles…

Solar and Stellar Astrophysics · Physics 2012-08-16 Thomas G. Bisbas

Time-dependent cooling processes are of paramount importance in the evolution of astrophysical gaseous nebulae and, in particular, when radiative shocks are present. The present work introduces a necessary set of tools that can be used to…

Astrophysics · Physics 2008-08-20 O. Tesileanu , A. Mignone , S. Massaglia

We report the 1-D cooling of $^{85}$Rb atoms using a velocity-dependent optical force based upon Ramsey matter-wave interferometry. Using stimulated Raman transitions between ground hyperfine states, 12 cycles of the interferometer sequence…

Atomic Physics · Physics 2015-08-19 Alexander Dunning , Rachel Gregory , James Bateman , Matthew Himsworth , Tim Freegarde

Context. Observations suggest that exoplanets such as HD 189733b form clouds in their atmospheres which have a strong feedback onto their thermodynamical and chemical structure, and overall appearance. Aims. Inspired by mineral cloud…

Earth and Planetary Astrophysics · Physics 2021-06-04 E. K. H. Lee , Ch. Helling , I. Dobbs-Dixon , D. Juncher

We present a study of the impact of photoionization feedback from young massive stars on the turbulent statistics of star-forming molecular clouds. This feedback is expected to alter the density structure of molecular clouds and affect…

Astrophysics of Galaxies · Physics 2020-11-09 Nina S. Sartorio , Bert Vandenbroucke , Diego Falceta-Goncalves , Kenneth Wood

We study the structural evolution of turbulent molecular clouds under the influence of ionizing radiation emitted from a nearby massive star by performing a high resolution parameter study with the iVINE code. The temperature is taken to be…

Solar and Stellar Astrophysics · Physics 2015-05-19 Matthias Gritschneder , Andreas Burkert , Thorsten Naab , Stefanie Walch

We introduce LUCIE-3D, a lightweight three-dimensional climate emulator designed to capture the vertical structure of the atmosphere, respond to climate change forcings, and maintain computational efficiency with long-term stability.…

Machine Learning · Computer Science 2025-09-03 Haiwen Guan , Troy Arcomano , Ashesh Chattopadhyay , Romit Maulik

Noisy 3D point clouds arise in many applications. They may be due to errors when constructing a 3D model from images or simply to imprecise depth sensors. Point clouds can be given geometrical structure using graphs created from the…

Computer Vision and Pattern Recognition · Computer Science 2015-11-17 Yann Schoenenberger , Johan Paratte , Pierre Vandergheynst

We present a new version of the fully 3D photoionization and dust radiative transfer code, MOCASSIN, that uses a Monte Carlo approach for the transfer of radiation. The X-ray enabled MOCASSIN allows a fully geometry independent description…

Astrophysics · Physics 2009-11-13 Barbara Ercolano , Peter R. Young , Jeremy J. Drake , John C. Raymond

We present a simple way to construct 3D initial conditions for relativistic heavy-ion collisions based on the Glauber collision geometry. Local energy and momentum conservation conditions are imposed to set non-trivial constraints on our…

Nuclear Theory · Physics 2020-07-22 Chun Shen , Sahr Alzhrani

Observations of exoplanet atmospheres have revealed the presence of cloud particles in their atmospheres. 3D modelling of cloud formation in atmospheres of extrasolar planets coupled to the atmospheric dynamics has long been a challenge. We…

Earth and Planetary Astrophysics · Physics 2021-06-04 E. K. H. Lee , I. Dobbs-Dixon , Ch. Helling , K. Bognar , P. Woitke