... Briefly, the count rate at the detector from a source at a redshift z is . ... Another possible way that could lead to arising diverse peculiarities in the - distribution induced by the sources evolution is connected with a possible non-monotonic character of the star formation rate in galaxies. ... The most prominent feature of the obtained theoretical - is a notable sharp increase at low count rates due to evolutionary effects. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... The rates of type Ia supernovae from double degenerate mergers channel in different star formation models (left panel), and the rate contribution function to the present-day ( t disc = 10Gyr) supernovae rates in the thin disc (right panel). ... We have compared the impact of different star-formation models on the rates and numbers of DDs and on the rates of type Ia (SNIa) and core-collapse supernovae (ccSN). ...

Scale-heights of the Galactic disk subsytems with different ages and metallicities . V.Marsakov & Yu. ... It is based on the fact, that all stars cross the disk plane several times during their Galactic orbital period. ... We have used our representative sample of nearby disk F2-G2 stars Marsakov & Shevelev (1995) in which fundamental stellar parameters was determined on the basis of published date on uvby-photometry, proper motion and radial velocities. ... Marsakov V.A., Shevelev Yu.G. Bull. ...

Since 1994, the Astronomical Society of the Pacific's (ASP) highly successful national Project ASTRO? program has been providing opportunities for professional and amateur astronomers to contribute to science education in their local communities. ... The original "classic" Project ASTRO educator-astronomer partners found tremendous interest in what they were doing among the families of their students, and thus Family ASTRO was born to continue at home what was begun in the classroom. ...

A Test of Galaxy Evolutionary Models Via Angular Sizes M. Im S. Casertano, R. E. Griffiths, & K. U. Ratnatunga (The Johns Hopkins University) The relationship between angular size, magnitude, and redshift of faint galaxies is explored as a potential tool to distinguish between different galaxy evolutionary models. ... The mild lumi­ nosity evolution model predicts more luminous galaxies of large angular size at high redshift, as does a standard no evolution model. ... 25) with redshift higher than z ? ...

... Tools . ... In order to generate random numbers that follow a normal distribution, one first needs to create two uniform random numbers $u_{1}$ and $u_{2}$, in the range of 0 to 1. ... begin{equation*} g_{1} = \sqrt{-2 \ln(u_{1})} \cos(2 \pi u_{2}) \end{equation*} . ... Random numbers following a power law, $P(x) \propto x^{n}$, can be generated from a single uniform random number, $u$, in the range of 0 to 1 through the following transform : . ...

. XMM-Newton Science Analysis System . ssclib (ssclib-3.33.4) [xmmsas_20080701_1801-8.0.0] . Meta Index / Home Page . Module name: random_aux . Author: Ian Stewart (University of Leicester, ims@star.le.ac.uk) . XMM-Newton SOC/SSC -- 2008-07-01

... The absolute Galois group of Q, denoted Gal(\bar{Q}/Q) in the sequel, is a fundamental object in arithmetics since it carries a lot of informations about number fields. ... A classical way to study this group is to use p-adic numbers. ... firstly, we will explain the classical d vissage of Gal(\bar{Q_p}/Q_p) based on ramification theory; as a corollary, we will deduce that any finite extension of Q_p is resoluble; . ...

... 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 . ...

... Circle area is proportional to the number of tweets + retweets tweets retweets . Order accounts: by user number (effectively random) by number of tweets (includes retweets) by number of followers by number of followers that also tweeted about AAS223 by number of friends that also tweeted about AAS223 . ... The top/left position is for the user with the largest number of followers, and the bottom/right is for the smallest number of followers. by number of followers that also tweeted about AAS223 . ...

... 318, P L63-L66 (1997). ... Article in PDF format (144 KB) . ... 318, P L67-L70 (1997). ... 318, P 667-672 (1997). ... 318, P 673-679 (1997). ... 318, P 680-686 (1997). ... 318, P 687-699 (1997). ... 318, P 700-720 (1997). ... 318, P 721-728 (1997). ... 318, P 729-740 (1997). ... The number of O-type runaways, the number of O and Wolf-Rayet stars with a compact companion and the formation rate of double pulsars predicted by massive close binary evolution . ... helpdesk@link.springer.de . ...

... The information is submitted as the tables and is distributed on given years of the observation, each of that, according to an adopted classification, includes the information about six active basins of the World Ocean: · the Northwest Pacific; · the Northeast Pacific; · the Northern Atlantic; · the Northern Indian ocean; · the Southern Indian ocean; · the Southwest Pacific. ... Lat' is latitude in degrees (up to one tenth) of the geographical place of the disturbance's onset. ...

HIGH MASS X-RAY BINARIES AND RECENT STAR FORMATION HISTORY P. Shtykovskiy 1 1,2 and M. Gilfanov 2,1 Space Research Institute of Russian Academy of Sciences, Moscow, Russia 2 Max-Planck-Institut fur Astrophysik, Garching b. Munchen, Germany Ё Ё ABSTRACT Based on the XMM-Newton observations of Magellanic Clouds we consider the dependence of population of high mass X-ray binaries on the recent star formation history in the host galaxy. ... HMXBS AND RECENT STAR FORMATION IN MAGELLANIC CLOUDS 4.1. ...

. Number of Supernovae discovered by amateurs. In this page the amateurs' contribution in supernovae discoveries is shown. The SN 1957B was the first supernova discovered by an amateur astronomer: Giuliano Romano. He discovered it with his own 0.40 mt. telescope at Treviso (Italy), then later he become a professional. This graph is updated to SN 2000ek . Yellow values are SNe discovered by amateurs, red ones the total number of SNe discovered for each year .

... A classic test of the standard orientation-dependent unified schemes has been the assessment of the quasar fraction in complete radio samples. Using a sample of giant radiosources (projected size ) out to redshifts of , I demonstrate that the fraction of broad line objects is smaller than that obtained by comparison of quasars and galaxies in the 3CR sample. ... The sample . ... Giant radio sources ( ) have traditionally been of great interest for several reasons. ...

... Results 3. ... 2004), Escapa (2011): Hamiltonian approach, simplified elastic response. ... PАg. ... Let us recall that assuming a rheological model based in Smith (1974) , Wahr (1979) and IERS (2010) for the elastic/anelastic response of the Earth, the second order harmonic components of the redistribution potential admit a truncated development in complex spherical harmonics in the form Generalized Love Numbers, dependent on: Harmonic order, Excitation frequencies In magnitude, PАg. ...

Magnetic stars, 2004,225-229 Averaged magnetic phase curves. ... ANALYSIS OF THE CATALOG 227 4 3 N stars 2 1 -4000 -3000 -2000 -1000 0 1000 2000 B0 (G) Figure 3: Number distribution of stars vs. coeffcient B0 for those stars which exhibit a magnetic phase curve with a double wave. of a magnetic star can occur if the angle between the magnetic and rotational axes is small or even zero. ... The catalog lists phase curves for 139 stars, 134 of them are magnetic Ap stars. ...

God Science Forum Message . Forums: . ... God and Science ћ SETI ћ Software ћ UFO ћ XEphem . ... Discussion Forums | God and Science | ... Nothing? Beyond Numbers.. Forum List | ... You do not know your future; yet it feels as if it is ALREADY known. ... www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... Moscow, Russia E-mail: krivosheev@iki.rssi.ru Notes: · · The Monte Carlo method (s) is also called the statistical test method An innumerable number of processes can be listed the outcome of which is not determined and has probabilistic nature, but these processes obey statistical laws, so to obtain the result we have to make multiple similar tests, i.e. to use the MC method Because probabilistic processes are widely spread in nature, the MC ...