Next: NICMOS/HST H-band (F160W) Images Up: NICMOS Science Previous: HST NICMOS Observations of . ... Observations of P . ... The NICMOS team has devised a comprehensive program of observations of the Galactic Center. ... Data in hand give a first look at variability and a detailed look at the search for the tip of the main sequence will be discussed where NICMOS has demonstrated adequate sensitivity and photometric precision to identify likely O8-B1 stars at the Galactic Center. ...

Some peculiarities of orbits of observed comets. ... Icarus, 2005 Simulation and reality Distribution of anti-perihelia of short-period comets with e 0.9 ( ecliptic coordinates ) Distribution of anti-perihelia of short-period comets with e 0.9 ( ecliptic coordinates ) Distribution of anti-perihelia of long-period comets with 0.9 e 1 ( ecliptic coordinates ) ­ ...

... CONDENSED MATTER PHYSICS SUPPLEMENTARY PROGRAM . ... Relationship between symmetry of crystal structure, point symmetry and symmetry of physical properties of crystals. ... Crystal lattice energy, Structural types. ... Typical structures of metal and semiconductor phases. ... Wave diffraction in crystals and basic methods of investigation of crystal structures, their principles, potentialities and specifics. ... Crystal optics. ... Principal methods of investigation phase transitions in solids. ...

... V.V.Shevchenko, Sternberg State Astronomical Institute, Moscow University, Universitetsky 13, Moscow 119899, Russia, shev@sai.msu.ru . ... 1.Sternberg State Astronomical Institute, 119899, Moscow, Russia. shev@sai.msu.ru . ... V.V.Shevchenko, Sternberg State Astronomical Institute, Moscow University, Moscow 119992, Russia, shev@sai.msu.ru . ... 119992 Moscow, Russia; . ... 2Sternberg Astronomical Institute, Moscow University, Moscow, 119992, Russia, . ... Moscow, 119992, Russia shev@sai.msu.ru . ...

... 368, 2007 Petr Heinzel, Ivan Dorotovi and Robert J. Rutten, eds. c Some Structural Prop erties of Solar Magnetic Fields B. Ioshpa, E. Mogilevskii and V. Obridko IZMIRAN, Troitsk, Moscow Region, Russia Abstract. We discuss some results of the study of spatial characteristics of solar magnetic fields. ... The global fractal numbers of space distribution of magnetic field on solar surface is closely connected with the mean absolute values of the longitudinal magnetic field for this surface. ...

... This thread contains a step-by-step recipe to extract MOS spectra of a point-like source observed in Imaging mode and to create associated response matrices, starting from a calibrated, concatenated event list (either produced with emproc or available as PPS product; here it has the assumed file name MOS.fits ). ... The users should note that the SAS metatask xmmselect allows them to interactively define source and background regions (via ds9) and to run backscale on the fly. ...

Home . ... Observing . Exposure Time Calculator (ETC) . Survey processing . ... ESO - Public Surveys . near IR surveys . ... Exposure Time Calculator . ... Survey Area Definition Tool . Recommended values for Detector Integration Time (DIT) . ... Detector Properties . ... Filter properties . ... ESO ][ VISTA Home ] ...

Short-Period Comets: Origin and Terrestrial Impact Hazard . ... The model is consistent with the basic observed distributions of near-parabolic comets, short-period comets, Centaurs and high-eccentricity trans-Neptunian objects.This model requires that initial objects in the early Solar System are concentrated to the outer planetary region, and the physical lifetime of comets in the inner planetary region at the present epoch is an increasing function of initial perihelion distances. ...

... The formation of the disks of disk galaxies remains poorly understood. ... Many disk galaxies have only the thin disk component, with no bulge or significant thick disk. ... Almost all disk galaxies have an exponential radial surface brightness distribution. The reason for this exponential form is not known; nor is it known when the exponential form is established. ... We would compare low redshift galaxies observed in the I band with galaxies at z =0.5 in the J band and at z =1 in the H band. ...

Abstract -- Calculations are performed for the linear polarization of starlight due to extinction by aligned dust grains when the starlight traverses a medium with irregular magnetic fields. This medium is intended to represent the optically thick components of interstellar clouds which are observed to make little, if any, contribution to the polarization of starlight. ...

... Hierarchy and stability 3. Stability criteria for triple systems 4. ... The results for selected systems with weak hierarchy (physical properties of components) System HD 40887 AB+CD HD 76644 AB+CD HD 217675 AB+CD HD 222326 A?+BC HD 284419 A+BC Spectral types K5V, M0V, K4V, ?? ... More accurate results for selected systems HD 217675/6 ( And) Quadruple system More accurate results for selected systems HD 217675/6 Pair B1B 2 More accurate results for selected systems HD 217675/6 (Zhuchkov et al. ...

... We show the analysis of low-hard and intermediate states of sources XTE J1550-564, H 1743-322, GX 339-4, XTE J1859-226, XTE J1650-500 and GRS 1915+105. ... Directly applying the scaling technique we also obtain that a ratio of the BH masses in XTE J1859-226 and in XTE J1550-564 is , and the corresponding ratio for XTE J1650-500 and XTE J1550-564 is . These values of scaling factors r implies that BH masses are ; solar masses in XTE J1859-226 and XTE J1650-500 respectively. ...

... Stellar Evolution . Nucleosynthesis in Stars . The Evolution of Star Clusters . JAVA Physics Lab . Alternative Energies Class . Steve Kevan's Physics 251 Class . ... Talk on Solid State Physics of CCD detectors . Talk on Cosmological Issues . ... Digital Spectra of Stars . NETexperts E-mail List . The Electronic Universe Project e-mail: nuts@moo.uoregon.edu ...

... I. Mean Surface Brightnesses and Integral Color Indices for Bars Gusev A.S. ================================================================================ Abstract: UBVRIJHK surface brightnesses and color indices of bars of galaxies are determined using surface photometry data for 100 barred galaxies (table1.dat). ... J0 Mean surface J0 brightness 46 A1 --- CI- CI sign 47 -50 F1.2 magn/sq.arcsec. U-B)0 (U-B)0 color index 52 -55 F1.2 magn/sq.arcsec. ...

... Observing . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... Reproducing the large-scale universe . ... Now, an international team of astronomers has reproduced the observed galaxy clustering by generating thousands of simulated galaxy catalogs. ... An international team of astronomers has now reproduced the observed galaxy clustering and determined the uncertainties in the measurement of observed quantities by generating thousands of simulated galaxy catalogs....

... All the galaxies are divided into 4 groups depending on the environment type; every subsample contains more than 10 galaxies. ... An effect of environments is seen both for the nuclei and for the bulges: if we consider the clusters (Virgo and Ursa Ma jor) and group centers as dense environments and the field and group periphery as sparse environments, then in the dense environments the stellar populations of S0s are in average older by 4­5 Gyr than in the sparse ones. ...

ASTRONOMICHESKII TSIRKULYAR No.1573, 2010 April 12 1995 2009 . A Comparison of the Latitudinal Variations of the Methane Absorption Bands on Saturn's Disk at Equinoxes 1995 and 2009 Abstract. The observations of Saturn at last equinox 2009 have detected significant differences of the latitudinal variations of the methane absorption from observed at 1995 equinox . ... 1995 . 2008- 2009 , ­ . ... 4 ( 580-880 ) , (.1) , 2008-2009 . ... 2 , 4 725 1995 2009 . ... 1995 2009 15 , 1980 1995 . ...

... Determination of Black Hole Masses via Correlations between their X-Ray Spectral and Timing Properties " . ... This fact strongly support our theoretically motivated idea that low frequency QPO for a particular BH state is inversely proportional to BH mass.Based on our scaling technique, we determine BH masses in H1743-322, GX 339-4, XTE J1650-500, XTE J1859-226, 4U 1543-47, 4U 1630-47, using independently known masses of XTE J1550-564, GRO J1655-40 and GRS 1915+105 as references. ...

... The Science Operation Department is composed of Astronomers, Telescope Instruments Operators(TIOs) and Data Handling Administrators(DHAs). ... Astronomers have proposed several methods to quantitatively measure the amount of turbulence above the telescope, which the most common ones is Differential Image Motion Monitor (DIMM). In optical testing, the Hartmann test is the common method to test the quality of optical components. ... Hartmann mask consists of 48 lenses. ...

... It has been largely superceded by MatWeb . Conversion Factors . Material properties . Physical constants . Astronomical constants . This table gives conversion factors to convert various units to their SI equivalents. ... The units are SI. This is a short list of physical constants in SI units. ... Boltzmann constant . ... Gas constant . ... Mass . ... Plank's . ... Radiation constant . ... This is a short list of astronomical constants in SI units. ... Sun . ...