Сергей Борисович Попов Доктор физ-мат наук, ведущий научный сотрудник ГАИШ МГУ. ... Занимаюсь в основном двойными и одиночными компактными объектами (нейтронными звездами, черными дырами). ... Поп. ... Основная область научных интересов в настоящее время - эволюция нейтронных звезд. ... Все эти белые карлики, нейтронные звезды и черные дыры являются для нас одними из самых удивительных лабораторий, в которых мы можем изучать явления, недоступные для земных экспериментов. ... Нейтронные звезды . ...

Подписка на рассылку обзоров astro-ph на Subscribe.Ru . ... Предыдущий выпуск (N335) . ... Обсудить на форуме Scientific.RU . ... Подписка на рассылку обзоров на Subscribe.Ru . Обзоры препринтов astro-ph . ... Собственно обзоры препринтов. ... Ранее обзоры также были на Астронете и на Scientific.Ru . ... АНКи доступны на Астронете , а с 2006 по 2008 г. также на сайте Элементы.Ру . ... Ранее они также размещались на сайте Астронет и в архиве моих обозрений (кодировка KOI8) на сайте Scientific.Ru . ...

... HST . ... Home . ... Data . ... WFPC2 Home . ... Calibration Home . ... Data Analysis Home . ... This tool generates simple formulae which may be used to compute Stokes I, Q, and U. These formulae may be applied to either observed aperture counts, or to entire images. One inputs the aperture, polarizer setting, and PA_V3 for each of three observed images. ... This tool uses Mueller matrices to generate equations relating the (unknown) Stokes vector incident on HST to the observed counts. ...

... 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. ...

... Tools . ... begin{equation*} \frac{\vartheta}{\mathrm{rad}} = 2 \pi r = 2 \pi \end{equation*} . ... begin{equation} \frac{\Omega}{\mathrm{sr}} = 4 \pi r^{2} = 4 \pi \label{eqn_solidangle} \end{equation} . ... begin{equation*} \frac{\Omega}{\mathrm{sr}} = 2 \pi \, [1 - \cos(\vartheta)] \end{equation*} . ... end{equation*} . ... begin{equation*} \cos(\alpha) = \sin(\vartheta_{1}) \sin(\vartheta_{2}) + \cos(\vartheta_{1}) \cos(\vartheta_{2}) \cos(\varphi_{1} - \varphi_{2}) , \end{equation*} . ...

... astro-ph/0303500 . ... В Архиве электронных препринтов появилась интересная и важная обзорная работа с юбилейным номером 0303500. Космический телескоп им. Хаббла . ... Благодаря столь широкому охвату читатель может узнать о множестве открытий последнего десятилетия в астрономии. Существенно и то, что Ливио не просто перечисляет открытия, он много рассказывает о физике явлений. ... Список ссылок занимает 15 страниц. ... Галактики на больших красных смещениях глазами Космического телескопа . ...

... In spite of the good potential possibilities, some of the station "Dnepr" design characteristics did not allow us to apply the usual special IS radar measurement methods. ... Thus for IS signal measurements at the "Dnepr" station, we have developed special methods for recording and processing IS signals in order to determine plasma ionospheric parameters. ... Equations (4-5) from the basis for data post processing to obtain ionosphere parameters. ...

... EQUATION 1: # The final equation is gain = a1 + a2*za + a3+( za-zac )^2 + a4*( za-zac )^3 # + a5*coz(az) + a6* sin (az) + a7* cos ( 2az ) + a8* sin ( 2az ) + a9* cos ( 3az ) + a10* sin ( 3az ) # EQUATION 2: # The final equation is gain = a1 + a2*( za-zac ) + a3+( za-zac )^2 + a4*( za-zac )^3 # + a5*coz(az) + a6* sin (az) + a7* cos ( 2az ) + a8* sin ( ... 1 8.92204 -0.11083 .00214 -.00342+ 0.41611 0.18207 -.10120 .02740 -.30386 -.14610 0 A 1.85 1.91 14.0 ...

... Because the DMR instrument is differential and every pixel is multiply sampled, sky maps are produced by solving a coupled system of linear equations (the normal equations) to minimize a chi-squared. ... This is reflected in the algebraic form of the normal equations matrix, so that, if one were to diagonalize the matrix, one would find a single eigenvector whose eigenvalue was identically zero, and the associated eigenvector, viewed as a sky map, would have a constant value. ...

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. ...

... Galaxies with polar rings (PRGs) are a unique class of extragalactic objects, consisting of a ring or disk of gas, stars and dust orbiting in a plane nearly perpendicular to the disk of a central galaxy. ... At present, there are only about two dozen kinematically confirmed galaxies in this PRG class, mostly from the Whitmore et al. (1990) catalogue, based on photographic images. ... Examples of object from our catalogue SPRC (=SDSS-based Polar Ring Catalogue). ...

... G., Filippova A.S. Presented by: Filippova A.S Achievements · Refined model based on the celestial-mechanics methods is presented that is a generalized version of the previously developed basic model · Subtle effects are qualitatively explained based on the amplitude-frequency analysis and the computer numerical modelling of the oscillatory pole motion, where the key feature is the Chandler wobble 2 Basic Model of the Polar Oscillations ...

... We start investigating the results from a non-magnetized (isotropic) plasma, before including the external magnetic field so important for space physics. ... propagating above the electron plasma frequency, w(pe) (reflection point for the waves) . note that, for very high frequencies, both phase and group velocities are equal to light velocity c, and we have electromagnetic wave in free space: even the electrons are unable to respond to the rapidly oscillating electric field! . ...

... Fitting the observed dependence includes calculations of the polarization cross-sections averaged over particles orientation and size distribution, their normalization and the comparison of obtained dependencies with Serkowski's curve representing observational data for a chosen star. ... Variations of the polarization factors with wavelength are shown in Fig. 16 for homogeneous spheroidal particles with PF orientation. ... The distinction between prolate and oblate spheroids is also clearly seen. ...

... Auroral Currents . ... Polar Caps . ... Aurora from Space . ... Magnetic Storms . ... Plasma phenomena occuring at one place in the magnetosphere also affect other locations This linkage is most pronounced between points that share the same field line, since field lines guide the motion of ions and electrons. ... Early researchers, who believed auroral electrons came from the Sun (see history ) could not understand why the aurora was absent from the vicinity of the magnetic pole itself. ...

... Explanation: Light polarization is familiar to many outdoor enthusiasts who use polarizing sunglasses to cut the glare of reflected light. These two views of comet Hale-Bopp also demonstrate the effect of polarization. At left is an "ordinary intensity image" of Hale-Bopp's coma taken April 14, while on the right a similar image made with polarizing filters represents the intensity of polarized light. ... Comet Hale-Bopp Over Val Parola Pass . ... The Dust and Ion Tales of Comet Hale-Bopp . ...

Unno, W. Line Formation of a Normal Zeeman Triplet http://adsabs.harvard.edu/abs/1956PASJ.. ... 108U Moe, Olav Kjeldseth A Generalized Theory for Line Formation in a Homogeneous Magnetic Field http://adsabs.harvard.edu/abs/1968SoPh.. ... 24S Landi Degl'Innocenti, Egidio; Landi Degl'Innocenti, Maurizio Quantum Theory of Line Formation in a Magnetic Field http://adsabs.harvard.edu/abs/1972SoPh.. ... 235H Sazonov, V. N. Polarization in Zeeman-split absorption lines http://adsabs.harvard.edu/abs/1975SvA.. ...

... Tonight's Sky . ... SUN MOON MERCURY VENUS MARS, JUPITER SATURN . ... The Magazine . ... Observing . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... Mars' south polar zoo . ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ... Astronomy Magazine . ...

... Aladen AL 5668 - удобные демисезонные полусапожки от белорусской фабрики 'ALADEN'. ... Цвет: черный. Aladen . ... title=' Постельное белье Esspero Polar Bear (3 предмета) - EssperoPolar Bear (3 предмета)' border='0' align='left' width='120' style='margin-right: 20px;' hspace='7' vspace='5'/> Комплект сменного белья Esspero Polar Bear состоит из трех предметов постельного белья для малыша, требующих наиболее частой смены. ... Цвет плафонов и подвесок: неокрашенный . Цвет арматуры: хром . ...

... April 25, 1997 . Hale-Bopp Polarized . ... Explanation : Light polarization is familiar to many outdoor enthusiasts who use polarizing sunglasses to cut the glare of reflected light. These two views of comet Hale-Bopp also demonstrate the effect of polarization. At left is an "ordinary intensity image" of Hale-Bopp's coma taken April 14, while on the right a similar image made with polarizing filters represents the intensity of polarized light. ... About APOD > . ...