. Next: Initial velocity Up: Space and velocity distributions Previous: Space and velocity distributions . Following Paczynsky (1990), we assume initial space distribution of young neutron stars to be varying exponentially with distance from the Galactic center and from the Galactic plane, that is probability distribution for young neutron star positions can be written in the form . with kpc, and pc. Mike E. Prokhorov . Fri Jul 19 19:16:07 MSD 1996

Scale-heights of the Galactic disk subsytems with different ages and metallicities . V.Marsakov & Yu. ... It is based on the fact, that all stars cross the disk plane several times during their Galactic orbital period. ... We have used our representative sample of nearby disk F2-G2 stars Marsakov & Shevelev (1995) in which fundamental stellar parameters was determined on the basis of published date on uvby-photometry, proper motion and radial velocities. ... Marsakov V.A., Shevelev Yu.G. Bull. ...

Next: Spectral Extraction of Point Up: Spectral Analysis Previous: Structure of the Spectral . A pulse height distribution can be extracted from a QPOE file only if the event structure is `large', `region', or `full'. ... With the new RDF format files, the output from qpspec for most instruments is split into three files: . ... source off-axis histogram . ... background off-axis histogram . For Einstein IPC, there are no off-axis histogram files, but there is a BAL histogram file, _bal.tab. ...

... Next: Cheating Poisson: A Up: Statistical Analysis Previous: Spatial Models and . ... The spatial distribution of stars in the Local Group dwarf irregular galaxy NGC 6822 has been studied, using recent positions and deep photometry for about 15,000 stars in the galaxy. Based on photometrical data, OB stars and red stars could be studied separately. Spatial statistical tools have been applied to the analysis of the spatial structure. ... Figure: Model selection by the aid of CAIC . ...

Large-Scale Structure of the local Universe with INTEGRAL observatory >200-300 , . ... It is now widely accepted, that practically every galaxy in the local Universe has supermassive black hole and some of these black holes are AGNs. ... 136 ( ) 49- . ... The map of the survey is shown on the left. ... Using Hard X-ray all-sky survey such important properties of nearby Universe as energetics of accretion to the supermassive black holes and large-scale mass distribution of matter were studied. ...

The weight and positions for the objects on the rotary floor were obtained from ecastro on nov03 and used to plot the weight distribution on the rotary floor. ... The figure shows the weight distribution by turret position. ... Fig 1 top: Each object on the floor is plotted with its weight vs its turret position. Fig 1 middle: The weight is averaged by turret position quadrant to show the imbalance in weight distribution. ... The turret position is that of the receiver or read off of the drawing. ...

... 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. ...

... 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. ...

... This project will involve close collaborations with D.J. Pisano (NRAO-Green Bank) and T. Murphy (U of Sydney). </p> <H4> H <font size=-1>I</font> dynamics near the Galactic Centre</H4> <p>The <a href="http:/www.astro.umn.edu/~naomi/sgps/">Southern Galactic Plane Survey</a> is a survey the neutral hydrogen (HI) component of the plane of our Galaxy. ... H <font size=-1>I</font> studies of the rotation curve are limited by a distance ambiguity interior to the solar circle. ...

ENERGETIC PARTICLE EXPERIMENT DOK-2 . ... Due to much higher energy, angular and time resolution, better separation of electrons and ions it is expected that DOK-2 experiment will allow to re-examine in more details energetic particle population and related processes in magnetosphere regions covered by the spacecraft orbit. ... Thin foil in front of detector absorbes protons with energies E<400 keV so this detector measures electron spectrum in 20 - 420 keV range. ... Energy values, keV . ...

Galactic coordinate system based on multi-wavelength catalogues Ping-Jie Ding, Jia-Cheng Liu, and Zi Zhu School of Astronomy and Space Science, Nanjing University, China Outline Introduction: why we need to establish a new Galactic Coordinate System ( GalCS ) Data and methods used to find a proper GalCS Results and conclusion Discussion 2 Introduction: why we need to establish a new GalCS The Galactic coordinate ... 3 The GalCS is defined by three parameters p , p and . ...

... gradients dependencies on solar wind parameters and IMF; . ... fate of thermal plasma at the dayside magnetopause. velocity-dispersed injections of the thermal and superthermal ions from LLBL at cusp and cleft (lowest energy VDIS-2 events); . ... outer cusp processes, role of outer cusp indentation, plasma entry (laminar reconnection, turbulent diffusion, others), role of turbulent boundary layer; . how is the magnetosheath plasma heated near magnetopause and cusp? . ... cusp/cleft wave emissions. ...

... The distribution of galactic RCB stars is controversial. Several authors have argued that they belong to a thick galactic disk, and are thus old Population I stars. ... However, their distribution and space velocities suggest they may alternatively belong to the even older galactic bulge (Population II, [ Drilling 1986 ]). ... These are the only RCB stars for which a distance is known and hence for which an absolute magnitude can be deduced. ...

... 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? ...

... 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...

Magellanic Cloud Structure from Near-IR Surveys I: The Viewing Angles of the LMC . ... We present a detailed study of the viewing angles of the LMC disk plane. ... Sinusoidal brightness variations with a peak-to-peak amplitude of approximately 0.25 mag are detected as function of position angle. ... There is tentative evidence for variations of approximately 10 degrees in the viewing angles with distance from the LMC center, suggesting that the LMC disk plane may be warped. ...

. Made using Google Earth 2007 . Above: The GMRT antennas of the central array from space. The white, blurry objects are the antennas dishes. Above: The GMRT antennas of the central array from space. The position of the antennas are maked by symbols. Above: The GMRT antennas of the outer array from space. The position of antennas are maked by symbols. Last modified: Tue Apr 24 18:19:47 EST 2007

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... 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. ...

... The source exhibits a mas-scale structure which, according to the USNO multi-epoch monitoring at 2.3 and 8.4 GHz over the period from 1994 July through 1998 April, undergoes considerable changes in the brightness distribution and positions of the major structural features. Our image is qualitatively consistent with the structural pattern of the source. ... We note a difference of ~90 in position angles of secondary components in our image and the 5 GHz VLBI image by Shen et al. 1998). ...