M. S. Raghunathan Tata Institute of Fundamental Research Mumbai, India msr@math.tifr.res.in On the first Betti numb er of compact lo cally symmetric spaces This talk is a survey about the first Betti number of a compact locally symmetric space X . ... Y. Matsushima studied first the case when all factors of X have rank (=dimension of a maximal totally geodesic flat sub manifold) 2. ... This expectation has proved to be correct in a large number of cases, the first results being due to Kazhdan. ...

Europa ("yoo ROH puh") is the sixth of Jupiter 's known satellites and the fourth largest; it is the second of the Galilean moons. ... Discovered by Galileo and Marius in 1610. ... But Europa's surface is not at all like anything in the inner solar system. ... The images of Europa's surface strongly resemble images of sea ice on Earth. It is possible that beneath Europa's surface ice there is a layer of liquid water , perhaps as much as 50 km deep, kept liquid by tidally generated heat. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... A sample of our new eclipse observations phased on our new ephemeris (section 4.2) Vertical grey bars indicate ingress and egress of the main accretion spot. ... When combined with published eclipse times and archival data spanning тИ®27 years, we detect departures from a linear and quadratic trend of тИ®60 s. The departures are strongly suggestive of two cyclic variations of 16(3) and 5.25(25) years. ...

... B ut Europa's surface is not at all like anything in the inner solar system. ... T he images of Europa's surface strongly resemble images of sea ice on Earth. It is possible that beneath Europa's surface ice there is a layer of liquid water , perhaps as much as 50 km deep, kept liquid by tidally generated heat. ... It is most likely generated by sunlight and charged particles hitting Europa's icy surface producing water vapor which is subsequently split into hydrogen and oxygen. ...

... Light curves resulting from electron scattering absorption in this envelope were computed and compared with observed IBIS/ISGRI and BATSE light curves. ... Assuming approximately 10-6 solar mass/year for the rate of the WR-wind, the observed light curves and accretion luminosity can be re-produced (assuming Thomson scattering opacity in the ionized He-rich envelope). ... Reduced 2-values between the models and ISGRI light curves vs inclination, for different mass ratios and wind velocities. ...

Astronotes Armagh Planetarium's Stellar Blog! ... Space Flight . ... Science Fiction . ... The New Horizons science team€а is inviting everyone worldwide to vote for the names that will be given to the most prominent features on Pluto and Charon, Pluto?s largest moon. The pre-listed names are€а an eclectic mix from mythology and the literature and history of exploration. You can even nominate names to be added to the list. ... Yuggoth (H. P. LovecraftтАЩs name for Pluto) . ... Name * . ...

... Graphics are imbedded in RTF in either a binary format or an (ASCII) hex dump of that binary. I have never seen a binary format graphic - I don't think that the filter will process binary correctly. It does handle the hex format of graphics, by converting the hex back into binary and writing the binary to a file. ... If a graphic is encountered when the filter is in the process of generating a link, the IMG form of the link is used even without the -I command line option. ...

... The Big Dipper . ... This common question frequently precedes the rediscovery of one of the most commonly recognized configurations of stars on the northern sky: the Big Dipper. ... But near local midnight on April 11, this mosaic of 3 minute long exposures revealed a green, unusually intense, atmospheric airglow stretching over thin clouds. ... This skyscape finds an esthetic balance of interstellar dust and gas residing in the suburbs of the nebula rich constellation of Orion. ... April . ...

... In 1959 the Government Decree enacted OKB-1 to initiate work on the development of ballistic rockets using solid propellant RT-1 with a warhead flight range of 2 500 km, a launch mass of up to 35 t, and a combat charge mass of 500 kg. In parallel, the tasks were pursued to implement work on RT-2 assuming the development of a ballistic rocket with a warhead flight range from 10 000 to 12 000 km and a combat charge mass of up to 500 kg. ... Official WEB-site of S.P.Korolev RSC Energia . ...

... In this case the F5-F9 dwarfs turn out to be more metal-rich (by 0.1 in [Fe/H] ) thab G and K dwarfs, and the metallicity of the Hyades cluster turns out to be larger than the solar one [Fe/H] Hyades =+0.1 . ... При этом карлики F5-F9 оказываются богаче металлами, чем более поздние звезды, примерно на 0.1 по [Fe/H] , и металличность звезд Гиад относительно Солнца равна [Fe/H] Hyades =+0.1 . ...

... Bad Astronomy . ... Every few months, one of a series of questions comes up on the USENET group sci.astro involving tides, or the rotation of the Moon, or the recession of the Moon from the Earth. ... Why the Moon's rotation period is the same as the length of time it takes to orbit the Earth (same as number 1, but phrased differently). ... But when this happens, the time it takes for the Earth to rotate once will be slowed to exactly the same time it takes for the Moon to go around the Earth once! ...

... Комментариев нет 3 августа 2010, 23:15 Blogger , English , Астрономия . Dark Stars and Boosted Dark Matter Annihilation Rates. (arXiv:1008.0348v1 [astro-ph.CO]) : "Dark Stars (DS) may constitute the first phase of stellar evolution, powered by dark matter (DM) annihilation. ... Secondly, we study the dependence of DS properties on the concentration pa- rameter of the initial DM density profile of the halos where the first stars are formed. ...

... 86 ­ 103 A Different Lo ok at Co ol Contact Binaries Stepien K. ё ґ Warsaw University Observatory, Warsaw, Poland Abstract. ... It assumes that W UMa­type stars are old ob jects which have passed the mass transfer episode with the mass ratio reversal. ... It is shown that the lack of hydrostatic equilibrium in a common envelope of the contact binary results in a large­scale flow of matter from the more massive primary to the secondary. ... The more massive, primary component is a MS star. ...

This document explains how to install, configure and run Apache 1.3 under Novell NetWare 5.x and above. ... Apache 1.3 is designed to run on NetWare 5.x and above and is installed by default on all NetWare 6 servers. ... You will need to compile apache and copy the files over to the server manually. ... Follow these steps to install Apache on NetWare from the binary download (assuming you will install to sys:/apache): . ... Copy the MIME.TYPES and magic files to SYS:/APACHE/CONF directory . ...

... 8, ``Celestial Mechanics'', 2002 Precession and free core nutation of neutron stars A. Gusev, I. Kitiashvili Kazan University, Russia In 1992 Wolszczan and Frail discovered a planetary system around the pulsar PSR 1257+12 [1]. ... Third case: the most likely possibility is the free precession of the pulsar with a rigid 81 neutron star. ... It is known that rotation of the terrestrial planets having rigid mantle and elliptical liquid core is characterized by Free Core Nutation (FCN). ...

... Kremlevskaya 18, Kazan, 420008 Tatarstan, Russia Received October 15, 2005; in final form, February 6, 2006 Abstract--We interpret the observed radial-velocity curve of the optical star in the low-mass X-ray binary 2S 0921­630 using a Roche model, taking into account the X-ray heating of the optical star and screening of X-rays coming from the relativistic object by the accretion disk. ... Mass of the compact object in the 2S 0921-630 X-ray binary for various models, with kx = 10 Model Table 6. ...

... A glance at the article might leave you assuming that the planet was discovered using a large telescope at a remote, high-elevation location or perhaps by a multi- billion dollar observatory in Earth orbit. Reading on, you may be surprised to find that astronomers actually discovered the planet with a small telescope located not too far from the city of Tucson, Arizona. ... Well, don't give up, because you can observe interesting celestial sights near low-elevation big cities. ...

IBIS Data Analysis . ... IBIS . ... Flat Fielding - Introduction . The images obtained by IBIS will have intensity variations across the field of view that are not due to the solar image, but rather caused by instrumental effects that alter the observed intensity in each point of the field of view. ... IBIS Flat Fielding Techniques . ... Therefore, it is desirable to obtain the flat field measurements center on a point along the equator near the heliographic center of the solar disk. ...

... Class . ... PREV CLASS NEXT CLASS . FRAMES NO FRAMES All Classes . ... FIELD | CONSTR | METHOD . DETAIL: FIELD | ... java.lang.Object ij.plugin.XYCoordinates . ... public class XYCoordinates . ... This method is called when the plugin is loaded. Methods inherited from class java.lang.Object . ... Constructor Detail public XYCoordinates () . ... This method is called when the plugin is loaded. 'arg', which may be blank, is the argument specified for this plugin in IJ_Props.txt. ...

implied--and its hypothesis assumed--that Mars had a magnetic field, but that was not known 10 years ago. ... NEW TOOLS, NEW TECHNIQUES In addition to responding to critics of the magnetite argument, the JSC ALH84001 team has spent years refuting those who have posited nonbiological explanations for the team's other three lines of evidence. ... Today we're no longer a paper-based world," said Aronoff, former chief technology officer for the Engineering Directorate. ...