Subject, Problems and Objects of Theoretical Astrophysics. ... Stellar Photospheres, Their Features. ... Physics of Continuous Radiation Absorption in Stellar Photospheres. ... Continuous Radiation Absorption in Stellar Photospheres of Various Spectral Classes. Solar Type Photospheres. ... Characterisics of Absorption Lines. ... Interstellar Absorption Lines, Their Features. ... Physical and Dynamic Features of Interstellar Medium, Which Follows from Observations of Interstellar Absorption Lines. ...

A crucial aspect of 3D Monte Carlo radiative transfer is the choice of the spatial grid used to partition the dusty medium. We critically investigate the use of octree grids in Monte Carlo dust radiative transfer, with two different octree construction algorithms (regular and barycentric subdivision) and three different octree traversal algorithms (top-down, neighbour list, and the bookkeeping method). ... The total number of grid cells, however, depends on the geometry of the model. ...

CURRENT SHEET ENERGETICS, FLARE EMISSIONS, AND ENERGY PARTITION IN | SIMULATED AND OBSERVED SOLAR ERUPTIONS | ... We investigate coronal energy flow during a simulated coronal mass | ejection (CME), and compare observable characteristics of the simulation| |to observed eruptions. ... in the energy equation. ... flowing out the sides of the current sheet, the energy flowing out the | lower tip of the current sheet, and the energy flowing out the upper tip| |of the current sheet. ...

Numerical simulation of electromagnetic scattering by morphologically complex objects Janna M. Dlugach*, Michael I. Mishchenko** *Main Astronomical Observatory of the National Academy of Sciences of Ukraine, Kyiv, Ukraine **NASA Goddard Institute for Space Studies, New York, USA Radiation mechanisms of astrophysical objects: classics today 21 ­ 25 September, 2015, St.Petersburg. ... Phase angle dependence of the degree of linear polarization for the center of the Jovian disk. ...

MATHEMATICAL MODELING: . ... This model is developed on the base of the probabilistic description of the collisional aeronomical processes and is realized on a computer as the numerical system (stochastic model). ... Shematovich, V.I., Bisikalo , D.V.             Nonequilibrium processes in the planetary and cometary atmospheres. ... In Russian) . ... Piarnpuu , A. A.; and Shematovich, V. I.       Construction of structural stochastic models of collision processes in rarefied gas media (abstract) . ...

We present preliminary results of modelling 2D magnetic reconnection in the solar transition region environment. ... The formation of asymmetric reconnection jets is demonstrated in this study. Nonlinear anisotropic thermal conduction, radiative losses, and volumetric heating are included in the energy equation in order to investigate the formation of reconnection jets more precisely, as these processes are of fundamental importance at that region. ...

... Research of an atmosphere of the Earth and other planets of Solar system by optical methods . ... The long-term experience of study of atmospheres of planets of Solar system in a department of physics of planets has defined directions and methods of researches spent for laboratory . ... The tasks of laboratory are researches by optical methods of structure of a Terrestrial atmosphere, namely study of spectra of absorption of its compound radiation of natural and artificial sources. ...

Numerical simulation of the self-pump ed Long Josephson junction using a modified Sine-Gordon model A.S. Sobolev a,, A.L. Pankratov b, J. Mygind a c Institute of Radio Engineering and Electronics (IREE), Mokhovaya st. 11/7, Moscow, 125009, Russia b Institute for Physics of Microstructures of RAS, Nizhny Novgorod, Russia c The Danish Technical University, Kgs. ... In our model the dumping parameter dep ends b oth on the spatial coordinate and the amplitude of the AC voltage. ...

... COMPUTER SIMULATION OF RADIOWAVE MULTIPLE SCATTERING EFFECTS IN IONOSPHERE USING MONTE-CARLO METHOD . ... Distribution of reflected radiation on the ground is computed. ... Such influence can be remarkable if the scattering is multiple, i.e. the optical thickness for the scattering process is considerably greater than a unit. ... Radiation energy transfer in the slab is modeled by distribution of some particles carring small portions of radiation energy. ... The isotropic plasma approximation is...

... Bojan Nikolic web pages (r. 329) . ALMA . ... AATM is a re-packaging of the version of ATM as used by the ALMA online calibration software ?TelCal?. ... The main reason for AATM is to bring the version of ATM used by ALMA to an as wide an audience as possible. ... This version of AATM therefore corresponds exactly to version on ATM-0_3_0 branch of the CVS, and will (I believe) be the same as what is used in ALMA 7.1. ... Computing dispersive atmospheric delay with AATM . ... ATM and AATM . ...

... 8, ``Celestial Mechanics'', 2002 Earth penumbra effects on AES motion taking into account the refraction and the extinction of the light in the atmosphere A. M. Fominov Institute of Applied Astronomy, St. Petersburg, Russia The perturbing acceleration F of the Artificial Earth Satellite (AES) due to the solar ... In step 1, the table of the shadow function values with the angle distances d between the solar disk and the earth disk edge may be calculated. ...

... EVE : · : -2-1- Kourou ­ · ­ () · 170 kg entry mass ­ High Balloon (ESA) · 170 kg entry mass ­ Optionally: Low balloon (Japan) · 35 kg entry mass Geometric configuration Insertion orbit : 250/66000 km Period = 1 day Inclination : 90° Periapsis node : ~ - 30° Sequence : · · · · · · · · Arrival Vinf = 3 km/s Entry probe 1 separation T0 ­ 7 days Entry probe 2 separation T0 ­ 5 days Orbiter acceleration DV = 50 m/s Probe ... 2005: - 2006-2015 2015 EVE - · EVE ­ ­ , ­ ( · - ...

We investigate the relative importance of starbursts and active galactic nuclei (AGN) in nuclear activities of ultraluminous infrared galaxies (ULIRGs) based on chemodynamical simulations combined with spectrophotometric synthesis codes. We numerically investigate both the gas accretion rates (ARs; m acc ) on to supermassive black holes (SMBHs) and the star formation rates (SFRs; m sf ) in ULIRGs formed by gas-rich galaxy mergers and thereby discuss what powers ULIRGs. ...

Courses recommended for Astronomy and Astrophysics Honours in 2006 . ... 1st semester 2006: 20 February - 2 June . ... Please note that some of the 1st semester honours courses may run slightly into the teaching free period between 5 June and 14 July. ... This can be either all six courses offered by RSAA (see below) or equivalent honours courses from Geology, Physics or Math. ... Final course date 21. ... Venue: Woolley Seminar Room, RSAA . ... April 26, Wednesday, 10-12am, Stellar parameters . ...

... Files in red?history) . ... Belts . ... 12a. Inner Belt . ... The artificial radiation belts from the Argus experiment were located in the "slot" between the two belts and their lifetimes of a few weeks underscored the temporary nature of trapping there (especially for electrons produced just above the atmosphere). ... Like surfers riding a wave, trapped electrons and ions rode this shock and within a minute or so created a new radiation belt just outside the inner belt (picture below). ...

Atmospheres of neutron stars with strong magnetic fields : progress and vistas Alexander Y. Potekhin1,2 in collaboration with: Gilles Chabrier2 Wynn Ho3,4 Dong Lai3 Zach Medin3,5 Valery ... Southampton (UK) McGill U. (Canada) U. TЭbingen (Germany) Kazan Federal U. (Russia) KITP ­ UCSB (USA) Multiwavelength spectrum of a neutron star Multiwavelength spectrum of the Vela pulsar G.G.Pavlov, V.E.Zavlin, D.Sanwal (2002) in Neutron ... Dottel lines ­ blackbody. ...

... Assured of a reliable method of solving the normal equations, we now consider the equations of condition. The observed magnitude m of a star at M air masses with true instrumental magnitude is modelled as ([ 10 ], [ 28 ]) . ... The effective extinction coefficient depends on the effective spectral gradient [ 29 ] of the star, for which we use some color index, affected by half the atmospheric reddening ([ 26 ], [ 10 ]): . ... Thus, for the B band of UBV, we use the (U-V) color. ...

... The polarimetry group at the Arcetri Observatory has been working for several years, mainly from the theoretical-interpretative side, on the polarization of the radiation emitted by objects of astrophysical interest. ... E. Landi Degl'Innocenti "The physics of polarization" in "Astrophysical Spectropolarimetry", J. Trujillo Bueno, F. Moreno Insertis, F. Sanchez (eds.), Cambridge University Press, 1. ... E. Landi Degl'Innocenti "The Zeeman effect: applications to solar physics" Astron. ...

There are many ordinary/partial differential equations/systems describing various phenomena in physics, mechanics, chemistry, biology, sociology, etc. ... Prerequisites: 1 semester "Advanced Calculus", 1 semester "Linear Algebra". Optional: 2 semester "Advanced Calculus", 2 semester "Linear Algebra", 1 semester "Functions of Complex Variables", elements of the functional analysis and the ordinary differential equations theory. ... Laplace transform for linear differential equations . ...

... Investigation into dynamics of in-orbit radiological situation both in Service Module and the ISS RS docking module, as well as accumulated radiation doses in anthropomorphic and spherical phantoms. ... Measurement of spatial and solid distributions of radiation characteristics of space ionizing radiation in pressurized compartments of Service Module and Docking Module of the ISS RS by means of scientific equipment PDA (Assembly of Passive Detectors) and Phantom (Spherical Tissue-Equivalent Phantom)...