... Binary orbits in the acceleration/period plane . Circular Orbits . ... We first present the equations for the period and acceleration of a pulsar in an eccentric binary system as a function of its position in the orbit. ... In Freire, Kramer & Lyne (2001) (from where most of this text and following equations are taken), we describe in more detail how circular binary orbits can be determined from the observed periods and accelerations of the pulsar. ... where is the orbital period of the binary. ...

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The problem of turbulence is one of the most important and challenging problem of the modern science. ... An experimental investigation of turbulent flows with special experimental setup and equipment, which allow to obtain reliable data with good precision, is very difficult and expensive process. ... The natural assumption for the theory of turbulence is that there exist some (unknown yet) general and universal properties for wide range of different turbulent flows. ...

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• SAI Supernova catalog

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• Astronomy HyperText Book: Stellar Clusters
• Fabry-Perot Images of Spiral Galaxies
• Fabry-Perot Images of Starburst Galaxies

... The Astronomical Society of the Pacific (ASP), in partnership with the American Astronomical Society (AAS), has presented the annual Priscilla and Bart Bok Awards to two high-school seniors at the Intel International Science and Engineering Fair held May 9 to 14 in San Jose, California. ... The Priscilla and Bart Bok Awards are given jointly by the ASP and the AAS. ... Upon his death in 1983, the ASP established the Bart Bok Memorial Fund to support educational projects. ...

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• ASP: The New and Improved Hubble Space Telescope
• ASP: A Flag for Mars

... A hundred years later, a handful of Tunguska-sized asteroids have been spotted by telescopes, but most remain unseen. The asteroid designated 2008 TC3 , which made the news on October 6th before colliding with the Earth on October 7th was too small to constitute a part of the "Earth impact hazard". ... 2008 TC3, for example, finally exploded in the atmosphere above Sudan . ... Wednesday, 8 October 2008 01:15 . International Year of Astronomy, Ireland National Node . ...

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• Armagh Astropark
• Results & Discussion
• Armagh Observatory

... Galaxies in the Local Volume . ... Accurate distances are now available for the majority of these nearby galaxies, allowing us to visualise the Local Volume in 3D, study the local Hubble flow and its dispersion, the (baryonic) Tully-Fisher relation, the local star formation density, etc. Individual galaxies in the Local Volume can be studied in amazing detail across a large range of wavelengths (some stunning examples are compiled in the Multiwavelength Astronomy pages). ...

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• Duchamp Source Finder
• Programme - Abstract
• Millisecond pulsar Velocities

The spatial power spectra of Galactic . ... Neutral hydrogen is an important constituent of the interstellar medium, and has been widely studied at 21 cm line emission. Within the Galactic plane, structure of HI emission is seen over wide range of angular scales, down to tens of milliarc seconds. ... In the high galactic latitudes an alternative approach is seen more reasonable - to describe HI emission in terms of an angular power spectrum over a range of scales. ... Figure 1. ...

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• Spectral energy distribution
• Observational data and reduction
• Fabry-Perot Interferometer: Gallery Old

Herschel Guaranteed-Time Key Projects . at Arcetri . ... Both regard spectroscopic observations of different classes of star-forming regions in the Galaxy. WISH: WATER IN STAR-FORMING REGIONS WITH HERSCHEL . ... HS3F: HERSCHEL SPECTRAL SURVEYS OF STAR FORMATION REGIONS . ... Since gas cools mostly by line emission, knowing what molecules are formed and which lines are emitted in the different regions at different times is mandatory to understand the gas thermal balance. ...

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• Galaxy archaeology over the last 7 billion years
• K-band Arcetri Obscured Supernova Search - Detected Supernovae
• A Powerful Twin Arrives (ESO Press Release 17/99)

Next: Discussion Up: Adaptive Regularized Restoration Algorithms Previous: Iterative Image Restoration . ... Fig. 1 shows the original blurred image and the Richardson-Lucy restoration. Fig. 2 shows the restored result using the generalized iterative adaptive algorithm and the frequency adaptive algorithm. ... The graph for the Richardson-Lucy implementation is seen in Fig. 4, the spatial iterative adaptive algorithm's graph is seen in Fig. 5, and the frequency adaptive algorithm's is seen in Fig. ...

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• HST this week: 329
• The Herschel Exploitation of Local Galaxy Andromeda (HELGA). I. Global
• CSPICE Routines: PRSINT_C

... We revised topographical data obtained for the region to construct a generalized structure of the SPA basin as ringed formation. ... Because of our previous analysis of the ring structure [5, 6] we assumed the projection center o o coordinates as 180 W and 40 S. The hypsografic map shown in Fig. 1 demonstrates a hemisphere of the Moon which contains the SPA basin structure and its environs. ... Then we find the o o basin outermost ring center at roughly 180 and 40 S. Inner structure of the SPA basin...

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• http://selena.sai.msu.ru/Rod/Publications/ms34/MS059.pdf

... Ancient Greeks understood it quite well, and they considered astronomy not only as science, but also as art, with its Muse - Urania. ... Pushkin . ... Vulcano Island . ... Vulcano Workshop . ... Jim Beall Tree, Washington . ... Julia Tree, Pushkin . ... Tyumen, St.Peter and Pavel church . ... Binary Star . Binary System of X-ray Pulsar . Disk Accretion onto Magnetized Neutron Star . ... Discovery of X-ray stars . ... X-ray stages of binary evolution and Non X-ray stages of binary evolution . ...

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• The Stopping Radius
• Seminars
• Concluding Remarks and Future Prospects

... Spherical aberration, coma, and astigmatism are also easily observed using the star test. ... Off-axis images are complex. ... Fig. ... Diffraction by a circular aperture as a function of defocus for no aberration Airy Disk 1 wave defocus Less than 1 wave defocus Fig. ... Diffraction by a circular aperture as a function of defocus for third-order spherical aberration Paraxial Focus Small distance inside paraxial focus Moderate distance from marginal focus Immediate neighborhood of marginal focus Fig...

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... The remote planet Pluto and its moon Charon orbit the Sun at a mean distance of almost 6,000 million kilometres, or nearly fourty times farther out than the Earth. During a recent investigation by an international group of astronomers [1], the best picture ever of Pluto and Charon [2] was secured with the European Space Agency's Faint Object Camera at the Hubble Space Telescope (HST). ... The new HST image was taken when Charon was near its maximum elongation from Pluto (0.9 arcseconds). ...

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• PAM Bulletin
• Colours and magnitudes
• ESO - Observing conditions: definitions

... Accurate identification of physical binary star systems has become of increasing interest in recent years. ... Identification of physical binary star systems, with an estimated reliability of such identifications based on the theory of probability, is also important for current and future efforts to find binary star systems that are candidates for observations with the aim of determining their orbits and component masses. ... probability of the proximity of proper motions and ; . ...

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• World Coordinate Systems as Objects
• ADASS 2003 Conference Proceedings
• An Approach for Obtaining Polarization Information from COBE-DMR

... 1) A new bright galaxy of the Local Group VV124 (UGC4879) is found. ... Kopylov A.I., Tikhonov N.A., Fabrika S.N., Drozdovsky I.O., Valeev A.F., MNRAS Lett, V. 387, Issue 1, L45, 2008. ... For systems of galaxies in the regions of the Hercules and Leo superclusters the dwarf-to-giant ratio of galaxies in the r-band is evaluated, and it is found that this ratio increases with increasing X-ray luminosity at log L X > 43.5 erg/s. Kopylova F.G., Kopylov A.I., Ast. ... Kopylova F.G., Kopylov A.I., Ast. ...

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• The dust jets in the nucleus of comet 29P/Schwassmann-Wachmann 1
• The Present and Future of Small and Medium Size Telescopes
• Scientific achievements

spaceweb@oulu.fi - last update: 28 May 1995, 0800 UT . Advanced plasma theories are extremely important when one tries to explain, for example, the various waves and instabilities found in the plasma environment. ... In the kinetic theory it is necessary to know only the distribution function for the system of particles. ... The dependence of the distribution function on the independent variables r , v , and t is governed by an equation known as the Boltzmann equation . ... Hot plasma theory . ...

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• Influence of onboard events onto spin parameters
• Formulas
• Plasma waves [Oulu]

Pro ject Summary presented for Pierre Deligne's and "Dynasty" fund contests ASYMPTOTIC PROPERTIES OF ZETA FUNCTIONS ALEXEY ZYKIN The starting point of our research pro ject is the classical Brauer­Siegel theorem which is one the milestones of number theory of the past century. ... M. Tsfasman and S. Vl ё generalized this theorem to the case of families of almost normal adut global fields where the degree growths fast enough compared to the discriminant. ...

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• http://www.mccme.ru/tg2007/talks/Kolesnikov.pdf
• http://www.mccme.ru/dfc/2013/Program1/Kharitonov_Summary.pdf
• http://www.mccme.ru/dfc/2013/Program2/Khoroshkin_publications_2013.pdf

... SciSim release covered by this note . ... Data-Analysis-with-SAS in a simple and standardised way, and should allow calibration experts to re-assess the reliability of the different elements of XMM-Newton simulations. ... Also, a release of all calibration files to be used in the reduction, through the SAS, of SciSim generated data, is coordinated with this release. ... Furthermore, two SAS tasks (odffix and epicproc) had to be updated to make possible a proper SAS data reduction of simulated data. ...

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• Front Illumination
• XMM-Newton SAS: Watchout Page
• Background correction

Marc White . ... Turbulent entrainment processes may play an important role in the outflows from young stellar objects at all stages of their evolution. In particular, lateral entrainment of ambient material by high-velocity, well-collimated protostellar jets may be the cause of the multiple emission-line velocity components observed in the microjet-scale outflows driven by classical T Tauri stars. ... University of Amsterdam; STARPLAN, Copenhagen, Jul 2013 . ... E marc.white@anu.edu.au . ...

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• Raquel Salmeron - Research Interests and Experience
• Phase 1 Proposal
• Proposed Facility

. Christmas History Traditions Carols Celebration in UK Celebration in USA яhristmas Menu .

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• traditions