A magneti c fiel d functio n o f mai n sequenc e star s V.D . ... A magneti c fiel d functio n -- a frequenc y o f star s i n a give n rang e o f magneti c field s pe r on e Gaus s -- wa s constructe d fo r 10 3 star s o f th e mai n sequence . Th e dependenc e appearanc e i s discussed . ... Th e magneti c surve y o f th e star s u p t o m 4. 0 o f th e norther n sk y whic h wa s initiate d i n orde r t o refin e th e magneti c fiel d functio n appearanc e i s discussed . ...

... We investigate the stellar disk properties of a sample of 19 nearby spiral galaxies with low inclination and late Hubble type (Scd or later). We combine our high-resolution HST I-band observations with existing ground-based optical images to obtain surface brightness profiles that cover a high dynamic range of galactic radius. ... Indeed, the surface brightness profiles of these galaxies are generally well fit by adding a second (exponential) bulge component. ...

Russian Military Space Activity . r The experts in space and rocketry field as well as ones interested in the Russian cosmonautics know quite a well The Military Aspects of the Soviet Cosmonautics book by Maxim Tarasenko published in 1992. This book still is an unique independent Russian research in the military space programs' field. ... Instead, as a result of the author's many years efforts, The Russian Military Space Activities book manuscript was practically finished early in 1999. ...

Find Similar Abstracts . ... The formation of galaxies in Friedmannian universes . ... 00/1974 . ... ASTROPHYSICS, COSMOLOGY, GALACTIC CLUSTERS, GALACTIC EVOLUTION, GRAVITATION THEORY, DENSITY DISTRIBUTION, GALACTIC ROTATION, GAS HEATING, GAS IONIZATION, PERTURBATION THEORY, TEMPERATURE DISTRIBUTION . ... Use: Authors Title Abstract Text Text Query with Keywords Return: Query Results Query Form Database: Astronomy Instrumentation Physics and Geophysics ABSTRACT QUERY USER FEEDBACK HELP ...

... I present results from several seasons of photometric observations of X--ray sources in the Orion OB1a and OB1b star formation regions. The initial goal was to measure the rotational periods of several dozen pre--main sequence (PMS) stars. ... Infrared and optical data confirm that 90% of the X--ray sources are PMS and about 10% of the PMS stars may have disks. ... I find rotation periods for five stars at confidence of greater than 99.9/ greater than 99/ at much lower confidence. ...

... Fortunately, astronomy is an exception in this regard. ... As commercial databases have been described in detail before (see e.g. Watson 1991), this chapter will concentrate on Library information services that require neither an account nor a password and do not charge fees according to the connecting time or the number of data sets that are displayed or downloaded. ... American Astronomical Society (AAS) . Astronomical Observatory Trieste (OAT) library . ... Center for Astrophysics library . ...

We investigate models for main-sequence and horizontal-branch (HB) stars constructed using the Carson opacities and make comparisons with models based on the Cox-Stewart opacities. ... The drop in the hydrogen-shell luminosity due to the helium-core expansion during HB evolution is greater than that obtained with the Cox-Stewart opacities. ... Studies of main-sequence (MS) stars lead to agreement with Stothers' (1974a,b, 1976) results for homogeneous models constructed with Carson opacities. ...

Direct Electron Imaging Using Back Thinned CCDs . ... A proximity focused Gen III image intensifier has been built using a back illuminated 512 x 512 CCD in place of the phosphor screen. Signal to noise, spatial resolution, minimum resolvable signal and life are discussed. ... Very low light level imaging is driven by the need for high quantum efficiency detection of single photons at the highest possible speed and the highest spatial resolution. ...

A catalogue of stellar 1612 MHz maser sources. P. te Lintel Hekkert, H. Versteege, H.J. Habing and M. Wiertz We present a catalogue of stellar objects with \ohtw maser emission extracted from the literature published between 1963 and 1983. A total of 442 sources were found. ... A nearly full reference list (updated to 1987) is given. We discuss briefly the nature of the sources. OH/IR stars --- Masers --- Long--period variables . ...

... Program,Proceedings . ... Abstracts . ... The main purpose of the Workshop is to provide a forum for presenting and discussing the results of recent low temperature investigations in the microgravity environment, as well as future related studies in fundamental physics that can be carried out on ground and onboard the International Space Station, taking into account the advantage of long-duration experimentation in reduced gravity. ... Manuscript Submission - on attendance the Workshop . ...

Proceedings of the Particle Physics and Early Universe Conference (PPEUC). For this paper: postscript PPEUC CMB index 1 Introduction .. ... A new statistic is discussed, designed to detect isolated coherent step-like discontinuities produced by cosmic strings present at late times. ... The statistical variable considered is the Sample Mean Difference (SMD) between large neighbouring sectors of CMB maps, separated by straight lines in two dimensional maps and points in one dimensional maps. ...

... Stellar Evolution is driven entirely by the never ending battle between Pressure and Gravity . As imbalances are reached, the star is driven to find a new Energy source. ... Pressure and gravitational forces are equal, the star is stable and its core is sufficiently hot to fuse Hydrogen into Helium More about main sequence stars . ... The luminosity generated by the core fusion of Helium into Carbon is far greater than the shell luminosity associated with the fusion of Hydrogen into Helium. ...

... 1) The MS lower envelopes for groups of stars with different metallicities turn out to be coincident. ... 4) The conformation of the kinematics of stars within narrow ranges ob b-y with the ages derived from isohrones reveals that, at Z < Z , the isohrone ages seem to be increasingly overestimated with growing b-y . ... At a given metallicity, they have a much narrower MS and the locus of their MS lower envelope seems to be brighter for the metal-rich group of stars. ...

... The dynamics of silicate and graphite particles with radii of (0.1-2) 10 -5 cm in the vicinity of the Milky Way is considered. The equation of motion of dust grains is integrated with gravitational attraction, radiation pressure, gas drag, and dust destruction taken into account. The effect of other factors on the motion of grains are discussed. ... Dust is swept out of the Galaxy by radiation pressure from stars at a rate of 0.04 M o yr -1 . ...

... Next: FITS Checksum Verification Up: Data Models and Previous: A Proposed Convention . ... The FITSIO Subroutine Library has been available for 3 years, and has matured into a stable, full-featured interface for reading and writing FITS format files. ... The FITSIO subroutine library for reading and writing FITS files is now three years old and is used by many projects as the standard programming interface for accessing FITS format data files. ...

... Annual Meeting . ... Earth Space Science: Making Connections in Education and Public Outreach . ... A Symposium on Improving the Community of Practice for EPO Professionals . ... Click here for instructions to register for the Earth & Space Science EPO symposium. The Earth & Space Science EPO Symposium program committee welcomes four kinds of abstracts: . ... The Earth & Space Science EPO program committee is arranging a number of plenary talks or panels to complement the above sessions. ...

... This paper discusses evidence for and properties of disks associated to brown dwarfs in the star-forming region rho-Oph. ... We present low-resolution near-infrared spectra in the J, H and K bands, and determine for each source spectral type, extinction, effective temperature a nd luminosity by comparing the spectra to those of field dwarfs and to the most recent model stellar atmospheres. ... The coolest object in our sample has mass in the range 8-12 Mjup (0.008-0.012 Msun). ...

... 2 M.E. Zhukovskii, On the zero-one k -law extensions, European J. of Combinatorics, 2014, submitted. ... Published in conference abstracts 1 M.E. Zhukovskii, On the Weak Zero-One Laws for the Random Distance Graphs, Abstracts of the talks at the international conference Eurocomb 2009, Bordeaux, France, September, 2009. ... 10 M.E. Zhukovskii, On zero-one k -laws for the random graphs, Abstracts to the talks at the 55-th scientific conference in MIPT, Moscow, Russia, November, 2012. ...

... International Journal of Bifurcations and Chaos , 1998, vol. ... Impulsive synchronization of chaotic dynamic systems has some important applications to chaotic secure communication and chaotic spread-spectrum communication systems. In this paper we present some experimental results on impulsive synchronization between two Chua's circuits. ... The robustness of impulsive synchronization with respect to variations in the frequency and the width of impulses is studied. ...

... Registration form . ... Institute of Applied Astronomy of the Russian Academy of Sciences invites you to participate in the all-Russian scientific conference "Asteroid-Comet Hazard-2005" which will be held 3-7 October 2005 in St. Petersburg. ... Batrakov Yu.V. Institute of Applied Astronomy of RAS, St.Petersburg . ... Institute of Applied Astronomy of RAS . ... Finkelstein A.M. Institute of Applied Astronomy of RAS, St.Petersburg . ... Institute of Applied Astronomy of RAS, St.Petersburg . ...