Next: Star Formation Rate and Up: No Title Previous: Calculation of Evolutionary Tracks . To start calculations, we choose the distributions of the initial binary parameters: the mass of the primary ZAMS component, , binary mass ratio, , orbital separation a . ... whereas the mass ratio distribution is not. ... The zero assumption often made is that the mass ratio distribution has a flat shape, that is binaries with a high mass ratio occur as frequently as those with equal masses. ...

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• Normal star evolution
• The Model
• Effect of sources evolution on

... The HI - Star Formation Connection . ... Coffee . ... Dark Galaxies and Dark Matter . ... HI in Normal Galaxies . HI and Galaxy Evolution over Cosmic Time . ... How Galaxies Accrete Gas . ... The Billion Galaxy Survey . ... Searches for Dark Galaxies . ... Evidence for Dark Matter in Galaxies . HI in Galaxies: Overview . ... Open Questions in Normal Galaxies . ... Starburst galaxies and BCDs . ... HI Rich Galaxies . ... Open Questions in HI and Galaxy Evolution . HI and Galaxy Evolution . ...

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BSc thesis "Metallicity Gradients of Elliptical Galaxies", 1997, Univ. of Tokyo . MSc thesis "Low-Metallicity Inhibition of Type Ia Supernovae and Galactic and Cosmic Chemical Evolution", 1999, Univ. of Tokyo . PhD thesis "Formation and Chemodynamical Evolution of Galaxies", 2002, Univ. of Tokyo . ... Cosmic SFRs, chemical evolution, mass-dependent galactic winds, and the mass-metallicity relation of galaxies are reproduced (Kobayashi, Springel, White 06). ... What are dwarf galaxies? ...

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• COALA - Computational Astrophysics Laboratory

... casa::Normal . ... Normal ( RNG *gen, Double mean=0.0, Double variance=1.0) . Construct a random number generator for a normal distribution. virtual . ... Returns a value from the normal distribution. virtual Double . ... These function allow you to manipulate the parameters (mean & variance) described above through the base class. virtual Vector < Double > . ... The second and third arguments define the parameters for this distribution as described in the synopsis. virtual casa::Normal::~Normal . ...

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• ATNF Colloquium
• Tools - Random numbers
• casacore: casa::LogNormal Class Reference

... Keywords: globular clusters,M3,photometry,HST . ... Perform the most accurate test of the ``stellar clock'' used in dating globular clusters. ... These data will provide the first complete sample of post-main sequence stars over the entire area of the cluster, and will allow the most stringent tests of stellar evolution and dynamics models. ... M3 contains the largest population of Blue Straggler Stars (BSS) detected in a globular cluster so far ( ). ...

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• Starburst and Galaxy evolution
• Simulation of a Distant Cluster of Normal Galaxies
• The Radial Distribution of the Interstellar Medium in Disk Galaxies: Evidence

... The PSF is stored as a radial distribution in the CCF component PSF1DRB. ... The radial width of the PSF is stretched by the factor f by multiplying the radial bin limits with f : . The stretching factor f is calculated for the specified field position (rawX, rawY) from a 3rd order polynomial. (35) . ... calculate the minimum distance r of the pixel to the PSF centre (rawX, rawY) . calculate the maximum distance r of the pixel to the PSF centre (rawX, rawY) . ... normalize PSF map to 1 . ...

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• Poisson probability

The project of the informational system creation on the problem of evolution of radio galaxies, as a part of the "Big Trio" project aimed on studing of distant radio galaxies, is designed. This system allows a user to operate with simulated curves of spectral energy distributions (SED) to estimate ages and redshifts by photometry data. Authors use SEDs of several models for different types of galaxies. ... The HTTP and e-mail access is organized to this system. ...

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• Description of SED models

... arXiv.org . astro-ph . ... We fit the near-infrared to radio spectral energy distributions of 30 luminous and ultra-luminous infrared galaxies with pure starburst models or models that include both starburst and AGN components to determine important physical parameters for this population of objects. In particular we constrain the optical depth towards the luminosity source, the star formation rate, the star formation efficiency and the AGN fraction. ...

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... Using the central limit theorem, the total noise can be approximated by a Gaussian or normal distribution which has the frequency function : . ... where is the mean intensity of the source. ... In the statistical analysis of the probability distribution of data several estimators based on moments are used. ... For a normal distribution, these moments are and while for a Poisson distribution are and . Besides these moments other estimators are used to describe a distribution e.g. median and mode . ...

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• "Structure" publications in 1996 year
• Regression Analysis
• Estimation

... The distributions of orbits eccenttricities and of angular momenta for the halo stars and the old disk population are considered. The distributions have gaps separating the halo from the disk and dividing the halo population into three groups. ... Рассмотрены распределения звезд гало и старого населения диска по величине эксцентриситета орбит и угового момента. Распределения имеют провалы, отделяющие гало от диска и делящие населения гало на три группы. ...

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• Vladimir Marsakov Publication List
• RR LYRAE VARIABLES SUBSYSTEMS IN THE GALAXY, figures

... Chandra Observation of DEEP2 Galaxy Groups and Clusters . ... Monday: 'Normal' Galaxies, Tuesday: Cluster Formation and Evolution . ... Statistics of galaxy groups in ultradeep XMM surveys. ... What can multiwavelength observations tell about cluster/group formation as well as galaxy evolution? ... I will present results from a Chandra study of eight low-redshift clusters that has systematically measured the AGN fraction in clusters and describe their spatial, kinematic, and host galaxy...

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• The AstroStat Slog Blog Archive [ArXiv] Bimodal Color Distribution in GCS,
• Comments on: chi-square distribution [Eqn] By: Alex By: vlk By: aneta By: aneta
• The AstroStat Slog Blog Archive chi-square distribution [Eqn]

Topics covered by the IAU Symp. ... Do all galaxies have stellar halos? ... Stellar tracers of the MW halo and nearby galaxies; the stellar population of star clusters and their contribution to the galaxy halos . ... NEW: Scientific program of the IAU Symposium 317 can be downloaded here . ... GLOBAL PROPERTIES OF STELLAR HALOS FROM THE MILKY WAY TO EXTERNAL GALAXIES . ... DISCRETE CONSTITUENTS OF STELLAR HALOS IN THE MILKY WAY AND IN EXTERNAL GALAXIES : PLANETARY NEBULAE and GLOBULAR CLUSTERS . ...

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• FORS1: Sky Flats and Rotator Effect
• FORS2: Sky Flats and Rotator Effect
• ESO - Science in Garching

... Астронет | ... планета Астронет | ... S. Alba Villegas; R. Freire Ferrero . ... New insights on late-A and early-F star activity . ... Formation and stability of the galactic shock waves . ... Dispersion of electromagnetic waves in active moving plasma . ... N. G. Bochkarev; A. N. Burenkov; A. I. Shapovalova . ... The luminosity function of quasars (active galactic nuclei) in a merging model with the eddington limit taken into account . ... About the euro-asian astronomical society . ...

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• XWare > APOD

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . Despite our knowledge of stellar evolution, star birth remains a mystery. ... The latter two may indicate the envelope mass, M(env) and jet power L(jet), respectively. ... Here is a supplementary diagram showing the evolution of a low mass star with a 3000 year, 90 per cent oscillation in accreting mass superimposed. ... Also available is the evolution of a 0.5 solar mass star (on request). ...

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• Astronomy Research Themes : Stellar Evolution
• EXTREME HELIUM STARS
• The Evolutionary Status of RCBs

... In brief: the frequency-dependent radiative transfer equation is solved for a dust under assumption of spherically-symmetric geometry for its distribution taking into account particle size distribution and quantum heating effects for the very small dust particles. ... Table: Model parameters for IRAS04296+3429. ... parameter . ... hot dust shell) . ... The best fit to the spectral energy distribution of IRAS04296 is shown by heavy solid line (see Table2 for details concerning parameters of the model...

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• Description of algorithm
• Linux I/O port programming mini-HOWTO: Using I/O ports in C programs
• Search for distant radio galaxies in SAO

... 2005) INT star counts Theory: Origin of outer disk structure Type I: long standing debate about exp. form (but we may have for Type II and Type III) Type II: several models CT: starformation threshold (Kennicutt, 1989; Martin & Kennicutt, 2001; Schaye, 2004) (Elmegreen & Hunter, 2006; Li, Mac Low & Klessen, 2006) OLR: (bar) resonance phenomenon (Debattista et al. 2006) Type III: connection with interactions? star formation? ... Elmegreen & Hunter, 2006) more data is needed to decide on origin! ...

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• http://www.arcetri.astro.it/igm50/talks_all/grossi.pdf
• research field
• SteMaGE

... Galaxy Evolution home . ... Regulating the ISM and star formation . Cosmological evolution of star-forming galaxies . The origin and evolution of radio sources . Radio sources and their environments . ... Observations of the local Universe clearly demonstrate that very active star formation phases (starbursts) are often associated with interacting and merging galaxies and that in these systems much of the short wavelength emission is absorbed by dust and re-emitted in the IR. ...

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• Inference of Coefficients for Use in Phase Correction Bojan Nikolic web pages
• Galaxy Evolution: Regulation of the ISM and Star Formation
• Inference of Coefficients for Use in Phase Correction

Next: Feature enhancement: local Up: No Title Previous: Feature enhancement: filtering . ... As a result, a common magnitude scale (contour lines on the maps above, or color scale on Fig.1) will poorly display the short-duration events in a signal. Normalizing each line of the map (fixed duration) so it has unit variance (in effect dividing the energy map by the mean energy spectrum) at each duration restores more details of small-scale activity (Fig. ...

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• Relationship Between Auto Chirplet FF Plane and Radon Transform
• Energy distribution
• Data reduction: histograms and pdf's

Electronic Catalogue of Comets "Halley" . ... In this paper we give a description of the Electronic Catalogue of Comets "Halley", which makes it possible to calculate the evolution of the orbits of comets, to visualize orbital motion, to determine the circumstances of a comet's close approach to planets within a given time interval, as well as a number of other opportunities. ...

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• Keywords_129

... 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. ...

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• Evolution of Intelligence
• Evidence for Dark Matter
• Astronomy HyperText Book