... Abstract: We present Monte Carlo radiative transfer simulations for spiral galaxies modelled as a stellar disk and a two-phase clumpy dust distribution. ... As a general result, clumpy models are less opaque than the corresponding homogeneous models. ... 0.00 0.15 0.50 0.1 0.5 1.0 2.0 5.0 10.0 0.25 X . ... We have also produced several homogeneous models, to compare to the clumpy models. ... Homogeneous and clumpy models with the same tauV have the same dust mass. ...

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• research field
• Atlas of Monte Carlo Models of Dust Extinction in Galaxies

This is a tabulation of interstellar dust scattering properties dertermined from observations of various astrophysical objects (eg., ... Almost all studies in this field aim to determine the single scattering albedo (a) and scattering phase function asymmetry (g = <cos( )>) as different wavelengths. ... Plot Details . ... Plot details links to a page describing the studies included in the plot, the radiative transfer model used in each study, and an ascii listing of data plotted. ...

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• Model Fitting
• Herschel Images and Results for the Magellanic Clouds
• Spitzer Survey of the Large Magellanic Cloud, Surveying the Agents of a

... In brief: the frequency-dependent radiative transfer equation is solved for a dust under assumption of spherically-symmetric geometry for its distribution taking into account particle size distribution and quantum heating effects for the very small dust particles. ... Table: Model parameters for IRAS04296+3429. ... parameter . ... hot dust shell) . ... The best fit to the spectral energy distribution of IRAS04296 is shown by heavy solid line (see Table2 for details concerning parameters of the model...

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• Structure and properties of IRC+10216

. Documents latest versions (PS and Latex)

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• Jonathan's ASC/SDS documents
• H/RCULES
• The AstroStat Slog Blog Archive [ArXiv] Post Model Selection, Nov. 7, 2007

... Previous: Algorithms . ... On Fractal Modeling in Astrophysics: The Effect of Lacunarity on the Convergence of Algorithms for Scaling Exponents. ... Using Massively Parallel Processing of a NLTE Spectrum Synthetic Code and an Automated Comparison with Observations to Determine the Properties of Type Ia Supernovae from their Late Time Spectra. ... Copyright 1997 Astronomical Society of the Pacific , 390 Ashton Avenue, San Francisco, California 94112, USA . ...

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• Spatial Structure of NGC 6822: An Example for Statistical Modeling of
• Synthetic Images of the Solar Corona from Octree Representation of 3-D Electron
• Using Massively Parallel Processing of a NLTE Spectrum Synthetic Code and an

... Paradoxically, signal detection is concerned with fitting models to supposedly random series similarly to mathematical proofs by reductio ad absurdum of the antithesis. ... The quality of the fit is evaluated using a function S of the series , , and . ... A random variable S is characterized by its probability distribution function. ... The special realization of a random series which consists of independent variables of common (gaussian) distribution is called (gaussian) white noise. ...

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• Time series analysis in the frequency domain
• Diffuse Model
• Extinction and transformation models

Figure 1. ... Scattering geometry illustration. ... Maps of scattering angle in the cluster core for standard GCW grains and a Model A nebula (left) and UV-altered GCW grains in the same model (right). ... Degrees of consistency between the scattering angles of different models at different wavelengths. ... Schmidt scattering angles over a wider area. ... Schmidt line-of-sight separations over the same area, derived for two different simplified geometric models. ...

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• Heiles Symposium Presentations
• HISA Poster for the 197th Meeting of the AAS, January, 2001

Next: Polarization efficiency: size/shape/orientation effects Up: Optical properties of cosmic Previous: The 2175? feature . To model the interstellar polarization one needs to calculate the forward-transmitted radiation for an ensemble of non-spherical aligned dust grains. ... Let non-polarized stellar radiation passes through a dusty cloud with a homogeneous magnetic field. ... The angle between the line of sight and the magnetic field is ( ). ... where the angle is connected with and ( ). ...

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• Extinction properties (transmitted radiation)
• Database of Optical Properties -- Level: subpage
• Database of Optical Properties

Next: EVOLUTION MODELS Up: EXTREME HELIUM STARS: PULSATION Previous: EXTREME HELIUM STARS . The characteristic surface properties, effective temperature , surface gravity and composition , of EHes have been summarized by Jeffery (1996). ... Helium: ( ) By definition, helium dominates the atmospheric abundances. ... This is supported by a correlation between N and Fe abundances in EHes. ... Next: EVOLUTION MODELS Up: EXTREME HELIUM STARS: PULSATION Previous: EXTREME HELIUM STARS Simon Jeffery . ...

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• EVOLUTION MODELS
• V652HER AND MERGED BINARY WHITE DWARF MODELS
• MASSES

... Bojan Nikolic web pages (r. 329) . Understanding Infrared emission from galaxies . This page contains a description and links for download of software that may be used for modelling various aspect of absorption and emission of radiation by interstellar dust. ... Also, some basic modelling of radiation fields and similar supporting code . ... dust-1.0.1 . ... Modelling absorption and emission of radiation by interstellar dust . ... Copyright 2005 -- 2016, Bojan Nikolic feedback welcome ...

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• Modelling absorption and emission of radiation by interstellar dust
• Bojan Nikolic -- Fitting and Comparison of Models of Radio Spectra
• Paper I: Method Bojan Nikolic web pages (r. 329)

Russian SHAREABLE DATA CENTER Institute of Solar-Terrestial Physics SB RAS . ... Although their determination is based on the scattering process model, independent check-ups by rocket experiments have shown their correctness in experimental applications. ... Ionospheric data analysis, especially during strong disturbances, cannot be without some other kinds of diagnostic tools. ... The lack of data has always been a challange in this case. ...

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11 august 2014/Monday: Arriving, Registration . ... The variation of solar flare coronal X-ray source spatial properties. ... Melnikov V.F., Charikov Yu.E., Kudriavtsev I.V. Directivity of X-ray and gamma-ray emission from different parts of flaring magnetic loops. ... E., Melnikov V.F. Angular characteristics of polarization degree of hard X-ray emission from different parts of flaring magnetic loops. ... The thick target model and analytical calculations of the hard X-ray emission from solar flares. ...

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• Pulkovo EOP and Reference Systems Analysis Center (PERSAC)
• The XIII Russian-Finnish Symposium on Radio Astronomy

... The sample of the Local Volume galaxies (distance smaller than 10 Mpc) gives a unique opportunity to study the properties of galaxies including the weakest objects: the absolute magnitude M B -10 and the virial mass M vir 10 9 M x263C;. ... Luminosity function of the Local Volume galaxies. ... The luminosity functions for galaxies are presented: red dashed line - from the 2dFGRS survey (Norberg et al. 2002); blue dash-dotted line - from the SDSS survey (Blanton et al. ...

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• Electronic version of Russian Bulletin
• Modeling of Very Luminous Stars in the M33
• Measurement of the dark halo shape in polar ring galaxies

... Spectral energy distributions (SED) for starburst galaxies and ULIRGs are made public available using self-consistent radiative transfer computations assuming dust for the diffuse ISM ( Siebenmorgen et al, 2014). ... In the library of SED models we consider three basic model paramters and use: . ... the radiative transfer model: Kr gel and Siebenmorgen, 1994, AA 282, 407 . ... The starburst model and the SED library is described by Siebenmorgen and Kr gel, 2007, AA 462, 445 . ...

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• Sample Properties
• Stellar models
• ESO - Thesis Topic: Dynamical models of multiple globular cluster populations

The Variable Gamma-Ray Source 2CG 135+01 ApJ, 497:L89-L91, 1998 7 h gamma AGN variability . gamma-radio-AGN-variability ADS query . ... Model for the High-Energy Emission from Blazars 1993ApJ.. ... Possible Production of High-Energy Gamma Rays from Proton Acceleration in the Extragalactic Radio Source Markarian 501 astro-ph/9803241 K.Mannheim . ... A theoretical unifying scheme for gamma-ray bright blazars astro-ph/9807317 G. Ghisellini, A. Celotti, G. Fossati, L. Maraschi, A. Comastri . ...

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• Frequency distribution of galactic binaries
• Model of the Galaxy
• The Model

... 2.3 Establishing the Extragalactic Distance Scale . ... 2.3.2 The Second Rung: Distances to stellar clusters . ... 2.3.4 Distances to Local Group Galaxies . ... The Luminosity Function of Planetary Nebulae . ... 3.2.2 Clusters of Galaxies . ... 4.2 Evidence for Dark Matter as a Function of Scale Size . ... 4.3 Other Dark Matter Indicators for Galaxies . ... What is the nature of the large-scale distribution of matter in the universe as traced by the three-dimensional galaxy distribution? ...

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• Physics 410/510 Observational Cosmology
• Foundations of the Big Bang

My research interests are focussed on the theory and modelling of accretion processes as well as star and planet formation mechanisms. I am particularly interested in the stability properties of accretion discs, the generation of MHD turbulence and associated angular momentum transport, disk - planet interactions and the origin and characteristics of jets and winds from accreting systems . ... These results have been published in Salmeron & Wardle, 2005, M.N.R.A.S., 361: 45-69. ...

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• Lesson 1: Using Uncertainties
• Marc White - Astrophysicist - The Australian National University
• COALA - Computational Astrophysics Laboratory

Modelling Protostellar Disks Sarah Maddison Centre for Astrophysics and Supercomputing Swinburne University Overview · Types of circumstellar disks : ­ protostellar disks ­ circumbinary disks ­ protoplanetary disks · Modelling disk - important parameters: ­ Mdisk, Rdisk, H(r), i, T(r,z), (r,z)... ­ grain properties Introduction to PS Disks · Disks are a natural by- product of star formation process · Indirect evidence for ... Fuor and Xor outburst) convection in accretion disks? ...

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• http://www.atnf.csiro.au/research/LVmeeting/magsys_pres/LMC07a.pdf
• Research - The high-velocity clouds of M31
• A Global Model

Distributed system for water quality monitoring using remote-sensing data Shel estov A., Kravc henko A., Kussul N. Space Res earc h Institute of Ukraine, Kiev Mos c ow 2006 W ater Quality Service Goal: continuous monit oring of bio-optic al properties of water mass in Dnieper estuar y Tool: ocean c olor analysis - - The health of wat er Level of biologic al activit y Monitoring harmful algae ... Mos c ow 2006 ...

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• The magnetosphere models
• Space Research Institute (IKI) Seminar
• W o r k s h o p H E N D - 2003 'The Second year of HEND operations on the NASA

... G.P.Panasenko (J.-V.Poncelet, Moscow) Multiscale problems: junction of models of different dimension, applications to hemodynamics. ... Gubkina , Moscow, Russia . ... The workshop is devoted to an important trend in mathematical modeling, the multiscale methods and its applications in biology and medicine. ... It was organized in the frame of the thematic year on the multiscale methods and modeling in biology and medicine organized by the Russian-French laboratory J.-V.Poncelet. ...

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• Qualitative properties of reaction-diffusion equations (Spring 2009)
• Young researchers' seminar in statistical physics
• IUM (Spring 2014)