Masers and Galactic Structure: µas Astrometry with the VLBA Mark Reid Harvard-Smithsonian CfA Andreas Brunthaler & Karl Menten Germany Xu Ye & Zheng Xing-Wu China Lincoln Greenhill CfA Luca Moscadelli Italy Talk Outline · · Locating Sgr A*(IR) with masers Proper motion of Sgr A*: Sgr A* is very massive measured value for 0/R0 Star Formation Parallaxes and Proper Motions: Locations of Spiral Arms Rotation Curve (dark matter) Spiral Density Wave Theory · Where is the Galactic Center? ... Plane! ...

... On the base of laboratory simulations (on rotating shallow water) of the formation of spiral arms in galactic gaseous disks, the existence of giant anticyclones in them was predicted. Numerical simulations shown that the vortex structures arise on a linear stage of spiral arms formation simultaneously with the latter. ... Thus second giants structures, after spiral arms, in spiral galactic disks are discovered. ...

Galactic Spiral Structure in H I Emission and Self-Absorption S. J. Gibson (NAIC) H I Self-Absorption (HISA) occurs when cold H I lies in front of warmer H I emission (HIE) at the same radial velocity. The map and spectra AT LEF T show HISA in the Perseus spiral arm in the Canadian Galactic Plane Survey (CGPS; Taylor et al. ... The basic components of the model are shown AT LEF T with all 3 types of CNM cells (shock-induced, local, ambient disk), but without lumpy dispersion in the velocity field. ...

... Stuff . ... He works in the Institute of Solid State Physics Russian Academy of Sciences (Chernogolovka, Moscow distr.) ... Institute of Solid State Physics, RAS . ... G.E.Abrosimova, A.S.Aronin, E.Yu.Ignatieva “Metastable phase formed at amorphous   Ni70Mo10P20 alloy crystallization” - Physics of the Solid State, 48 (2006)  1, 114-119 . ... G.E.Abrosimova, A.Aronin «Fine structure of FAA nanocrystals in Al- and Ni-based alloys” - Physics of the Solid State, 44 (2002) N6, 1003-1007 . ...

This home page belongs to small group of scientists working at . Sternberg Astronomical Institute which is a part of Moscow State University . ... Электронная библиотека научно-технической и художественной литературы (доступна только из ГАИШ) . ... Local staff . Dr. Edward Kononovich (konon -at- sai.msu.ru), Associate Professor . ... Dr. Sergey Ayukov (asv -at- sai.msu.ru), Research Fellow, Webmaster of the group . ... Joint seminar of Solar Studies Structure Group and Solar Photometry Group . ...

... Accurate positions of 404 compact radio sources used as calibrators by the VLA are presented. In addition, the structure and polarization of each source at both 4885 and 1465 MHz are given. ... Amplitude calibration was based on 3C286, whose fluxes at 4885 and 1465 MHz were assumed to be 7.41 and 14.41 Jy, respectively, in accord with the scale of Baars et al. (1977). short description of columns, as taken from the publication: . 1 source name . ... 8 Polarized flux at 4885 MHz (mJy) . ...

Stellarium 0.12.3 . ... Classes . ... FileљStructure . ClassљList . ClassљIndex . ClassљHierarchy . ClassљMembers . List of all members | ... Position Struct Reference . ... More... #include < InterpolatedPosition.hpp > . ... Definition at line 37 of file InterpolatedPosition.hpp . The documentation for this struct was generated from the following file: . home/aw/devel/stellarium/trunk/plugins/TelescopeControl/src/clients/ InterpolatedPosition.hpp . ...

The Earth's magnetosphere global structure is conditioned by the interaction of the Solar wind and Earth's magnetic field. ... Many various magnetospheric models are available in the NSSDC . ... Fairfield D. H., Average and unusual location of the Earth's magnetopause and bow shock, J. Geophys. ... Stasiewicz K., Polar Cusp Topology and Position as a Function of Interplanetary Magnetic Field and Magnetic Activity: Comparison of a Model with Viking and other Observations, J. Geophys. ...

... Science Users Information > Science Activities > Science in Garching > Research Area: STELLAR STRUCTURE AND EVOLUTION . ... Reset view all 3 per page 5 per page 10 per page Sort by Title A-Z Title Z-A Date asc Date desc Research Topics Planets and Star Formation Stellar Structure and Evolution Stellar Populations Cosmology and the Early Universe Scientific Positions Faculty Fellows Scientists Students . ... Planets and Star Formation Stellar Populations Stellar Structure and Evolution Faculty . ...

Members of our Group . At the formation of the group in 2007 it included 5 persons: . ... Head of the Group) . Leading research scientist . ... 87822) 93415 . ... Ph.D. (87822) 93408 . Lebedev Vicktor . Research scientist . Ph.D. - . ... Senior research scientist . ... Ph.D. (87822) 93406 . In 2015 Lebedev Viktor retiered from the Observatory, thus a the present time the staff of the group is 4 persons. Return to group homepage . ...

... The Russian TESIS/ CORONAS-PHOTON Solar Observatory, which has been working in orbit since January 30th, 2009, has photographed one of the most important events in the build up to the upcoming solar cycle - the formation of our star's new southern belt of activity. The first magnetic fields of the new cycle in the southern hemisphere appeared on the Sun's surface on May 23-24th. ... The belt of activity is one of the primary concepts, characterizing the solar cycle. ...

... Spurs and Substructure in SPH Simulations of Spiral Galaxies . ... I will present calculations which show the formation of GMCs by the agglomeration of smaller clouds in spiral shocks, and the subsequent shearing of GMCs into interarm spurs. ... A connection can therefore be made that links the magnetic fields threading giant molecular clouds (GMCs) with the large-scale compressional processes that create GMCs in the spiral arms of ordinary disk galaxies. ...

... 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 . ...

The Earth. ... The middle raiding of the Earth is 6371,032 km, the pole 6356,777 km equatorial - 6378,160 km. The Earth surface area is 510,2 mln km^2, 70,8% of which is the World ocean. ... According to the modern cosmogonical views the Earth was formed 4,6 - 4,7 billions years ago from the protoplanet cloud captured by the Sun. ... The Earth is conditionally divided into 3 parts: a bark a cloak and a core (in the centre). The external layer - the bark is 35 km thick. ... Above the Earth. ...

... Input and output data is processed in the form of data sets, usually saved on disk as a FITS file. A data set can contain several blocks, such as tables and arrays (FITS's HDU). Traditionally blocks in a data set have been addressed by number (their position in the data set). ... The OGIP conventions for data products all have the block name set, so it is a matter of extending this concept also to utility tasks that normally wouldn't bother with the extension name. ... Note . ...

... Star Atlas . ... Gaseous ring around young star raises questions . ... Astronomers have detected a mysterious ring of carbon monoxide gas around the young star V1052 Cen, which is about 700 light-years away in the southern constellation Centaurus. ... This new finding raises more questions than it answers about the late stages of star and solar system formation. т??Why do turbulent motions not tear the ring apart?т?? ... Only registered members of Astronomy.com are allowed to comment on this article...

... General information . ... Staff . Research staff . Technical, administrative & librarian staff . ... Information . ... Historical highlights . ... Space spaghetti in magnetic sauce . ... In star forming regions where we previously pictured fluffy clouds, Herschel's infrared eyes have revealed intricate networks of intertwined filaments, tufts of hair, plates of spaghetti: in short, a structure replicating on a small scale the web-like cosmic fabric of the Universe ( Molinari et al. ...

... part 2 | ... Part 1 . The new concept of formation and development of the Solar system. ... Thus, the initial pulse of the rotation of a protosolar cloud of the solar system was determined as a result of the diversion of a part of the moment of the rotational pulse of the Galaxy. ... Besides this new approach to the pre-solar system as a system of the destroyed vortex structure, we can understand now a number of other peculiarities of the Solar system's structure. ...

"Dynamical friction and formation of structures: some cosmological aspects", Astroph. Space Sci., v.123, p.393-402, 1986 (with S.G.Simakov). "Accretion Mechanism of the Formation of Large Scale Structure of the Universe", Astron.Zh., vol.66, p225-231, 1989 (with S.G.Simakov). Back .

... R P is the perigalactic radius and R a , the apogalactic radius. Z max is the maximum deviation of the star from the Galactic plane. THe dotted curve shows the position of the Galactic plane. The hatched horizontal band shows schematically the band in Z , where the probability of that location of the star was calculated. The vertical band shows the width of the column in which we reconstruct the star distribution in Z . ... next figure | previous figure . ...