... We present a computer program for modelling energy flux distribution and light curves of eclipsing binaries from far ultraviolet to infrared regions. The Roche model is assumed. Proximity effects of components (reflection of radiation and surface gravity darkening) are taken into account. ... Figure 1: The surface temperature distribution for Algol A-B system before (upper plot) and after (lower plot) correction for temperature due to the irradiation effect. ...

... THE SIMPLEST MODEL. ... 13, Moscow 119992, Russia E-mail: san@sai.msu.ru Abstract: The analysis of the simplest model shows that an asteroid ­ rubble pile evolves, depending on the parameter V2d (where V is the average velocity of fragments and d is the average distance between fragments), either as a conglomerate of "independent mutually gravitating clusters" (when V2d < fm, where f is the gravitational constant and m is the average mass of a fragment) or as a "receding cluster" (when V2d > fm). ...

Brown J.C., Telfer D., Li Q., Hanuschik R., Cassinelli J. P., Kholtygin A. The effect of rotational gravity darkening on magnetically torqued Be star discs . ... 1 is not the optimum for creation of hot star discs which, in terms of emission measure for example, is found to occur in a broad peak around So~ 0.5-0.6 depending slightly on the wind velocity law. The relationship of this analytic quasi-steady parametric MTD model to other work on magnetically guided winds is discussed. ...

... higher temperatures -- faster motion -- higher energy particles -- break into nucleus . ... Spectral type depends on the stellar mass: high mass stars are profiligate with their fuel supply, and have brief, but spectacular, careers; M dwarfs live forever. Stellar lifetimes range from several million years for stars with 100 solar masses . ... These `failed stars' are known as 'brown dwarfs'. ... a brown dwarf of 0.01 M(sun) (10 Jupiter masses) takes only 10 7 years to reach the same limit. ...

... According to the most popular cosmological paradigm, the greater part of the galaxy mass is accumulated in the dark matter halo. ... The polar ring galaxies (PRGs) reveal external rings or disks of gas, dust and stars rotating in a plane roughly perpendicular to the disk of the central galaxy. ... The shape of the dark halo in the model was chosen so as to achieve the best fit to the observed rotation of both galaxies themselves and their polar rings. ... The SPRC-7 galaxy. ...

... ATNF Colloquium . The importance of the Earth's atmosphere propagation medium effects on radio astronomical observations . ... These propagation effects are manifested in very distinct fashion depending on the observing frequency. ... In this talk I will present a variety of methods to mitigate the effects of the atmosphere in radio astronomical observations. Furthermore I will address the applicability to various fields of science. ... today * ATNF | ...

. XMM-Newton Science Analysis System . srcmatch (srcmatch-3.15.18) [xmmsas_20060628_1801-7.0.0] . Meta Index / Home Page . Users have noticed that in some cases the number of output sources depend on the order of the input lists. This is due the fact that the first source list is used for position reference. Therefore, with more than 3 input lists the matching result can depend on the input order, if the distances between the candidates are near the matching radius. XMM-Newton SOC/SSC -- 2006-06-28

... Exposure Time Calculator (ETC) . Survey processing . ... VISTA is a 4-m class wide field survey telescope for the southern hemisphere, equipped with a near infrared camera (1.65 degree diameter field of view at VISTA's nominal pixel size) containing 67 million pixels of mean size 0.34 arcsec and available broad band filters at Z,Y,J,H,K s and a narrow band filter at 1.18 micron. A wide field visible camera, if constructed, could also be used on VISTA. ... Tile . ... ESO VISTA Public Surveys . ...

Position Switching Separation Tolerance with Arecibo in L-Band Travis McIntyre The University of New Mexico July 2010 Revised December 2013 Abstract The blocked telescope aperture at Arecibo creates standing waves in the bandpass around 1MHz. ... Test observations with Arecibo in L-Band show that position switching effectively removes standing waves for separations of one half FWHM or less. Standing waves remain for separations of one FWHM, increasing the rms of the baseline by 20%. ...

Allows you to specify the magnitude, proper motion, etc. of the object. ... Mag : magnitude of object. ... Obs Date : date of observation; used for correcting proper motion and radial velocity. ... PM RA/Long : proper motion in RA or Longitude, in arcsec/century. ... Warning: like all option panels, this one must be visible for its settings to have any effect. ... Defaults: restores this panel to its default values (the same values that will be used if you slew with this panel closed). ...

Class 1 Introduction, Background History of Modern Astronomy The Night Sky, Eclipses and the Seasons Kepler's Laws Newtonian Gravity General Relativity Matter and Light Telescopes Class 2 Solar System Characteristics Formation Exosolar Planets Class 3 Stars The Sun Stellar Evolution of Low and High Mass Stars Deaths of Stars Exotic Stars Class 4 Galaxies Galaxy Classification Formation of Galaxies Galactic Evolution ... So far, one planet has been studied by this method. ...

M.S. Petrovskaya, A.N. Vershkov. ... М.С. Петровская, А.Н. Вершков. ... Petrovskaya M.S., Vershkov A.N., Potential coefficients recovery from the spectra of the full space-borne gravity gradient tensor // International Association of Geodesy Symposia, Vol. 127, 2004, pp 234-241, Springer. ... Petrovskaya M.S., Zielinski J.B., Vershkov A.N., Recovering the Earth's potential spectral characteristics from GOCE mission // Advances in Space Research, Pergamon, Great Britain, Vol. ... Meeting Space Debris. ...

... memb ers of the CAUSTIC Group www.dfg.unito.it/ricerca/caustic Cambridge, April 19th 2011 SCIENTIFIC BACKGROUND Observations of SNae : Interpretation in the CDM model Alternative cosmological models: Conformal gravity and kinematic conformal gravity GRBs as cosmological probes: Bayesian approach BAYESIAN ANALYSIS Parameter forecasts (posterior probability): Likelihood and priors ... Constitution set of Hicken et al 2009) Bayesian parameter estimation again.. ...

... Proximity e#ects of com­ ponents (reflection of radiation and surface gravity darkening) are taken into account. ... As an example, we consider the Algol (# Persei) system, where an eclipsing pair (Algol A­B) is accompanied by the third component (Algol C). ... The surface temperature distribution for Algol A­B system before (upper plot) and after (lower plot) correction for temperature due to the irradiation e#ect. ... We solve this equation by the iterative Newton­Raphson method. ...

... Transitions between these levels gives line at 1.25 cm. ... 1.0 L/M=0.998 0.8 1.0 i=30 0.8 o Flux (arbitrary) 0.6 Flux (arbitrary) 0.6 0.4 0.4 0.2 0.2 D E 0.6 F 0.8 / 1.0 1.2 1.4 1.6 0.0 0.6 0.7 0.8 0.9 / 1.0 1.1 1.2 0.0 0.2 0.4 (a) Two wings 1.5 1.0 L/M=0.998 0.8 1.0 (b) Var ying rotation Flux (arbitrary) 0.6 Flux (arbitrary) C B 1.0 / 1.2 1.4 A 1.6 0.4 0.6 0.8 0.5 0.4 0.0 0.2 0.0 0.2 -0.5 0.4 0.6 0.8 / 1.0 1.2 (c) Var ying inclination (d) Data Figure 1: Fe line from accretion disk round black hole...

... Subject and Problems of Stellar Astronomy. ... Plane of Galaxy, Methods of Its Location Determination. ... Stars Distances. ... Other Methods of Stars Distances Determination. ... Tangential Velocities, Their Determination by Self-Motions. ... Determination of Solar Apex and Spatial Velocity by Radial and Spatial Velocities of Stars. ... Features of Orientation and Parameters of Peculiar Stellar Velocities Ellipsoid. ... General and Selective Light Absorption in Galaxy. ... Darc Clouds in Galaxy. ...

... The method developed in (Sorokin et al., 2005a, b) allows to calculate electric field generated by axially symmetric external current. ... Earth surface, 2. ... DC electric field amplification 665 = 40 ° , = 0 ° 1000 600 200 - 200 - 600 - 1000 - 1000 - 600 1000 600 200 - 200 - 600 = 30 ° , = 0 ° 1000 600 200 - 200 - 600 = 20 ° , = 0 ° X , km X , km - 200 200 600 1000 Y , km - 1000 - 1000 - 600 X , km - 200 200 600 1000 Y , km - 1000 - 1000 - 600 - ...

... Tonight's Sky . ... Observing . ... Star Atlas . ... stars . ... Astronomy for Kids . ... Unseen potential planet revealed by its gravity . ... Using Kepler Space Telescope transit data of "Planet b," scientists predicted that a second planet ("Planet c") about the mass of Saturn orbits the distant star KOI-872. ... Only registered members of Astronomy.com are allowed to comment on this article. ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email...

University Satellites and . Space Science Education . ... Two micro-spacecraft constellation with solar sails partially compensating the solar gravity allow their placement in the points along the Sun-Earth line behind the standard L1 point, i.e. further out from the Earth and closer to the Sun. The distances of the placement from the Earth and the base distances between such satellites depend on the ratios of their mass to the sail area. ...

... Ever since K.Tsiolkovsky laid theoretical foundations for a method to break the bonds of Earth's gravity and reach space, the dream of flying to other planets in our Solar System graduated from the realm of pure fantasy into a field of practical activities. ... Design work on manned mission to planet Mars which, among all the planets in our Solar System, has environments that are closest to those of Earth, started at RSC Energia almost as early as the work on first manned spaceflights. ...