منابع مشابه
CCD photometry of M 80 and the ranking of the C-M diagrams of galactic globulars
We present deep B and V CCD photometry of the intermediate metallicity, high central density galactic globular cluster M 80. More than 10000 stars have been measured, reaching a limiting magnitude V ' 23. The color magnitude diagram shows a population of very hot horizontal branch (HB) stars, stretching down to V magnitudes fainter than those of the turn off stars, to the limiting level of the ...
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Generalization abilities of empirical learning systems are essentially based on a priori information. The paper emphasizes the need of empirical measurement of a priori information by a posteriori control. A priori information is treated analogously to an infinite number of training data and expressed explicitly in terms of the function values of interest. This contrasts an implicit implementat...
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This is a introductory survey of some recent developments of “Galois ideas” in Arithmetic, Complex Analysis, Transcendental Number Theory and Quantum Field Theory, and of some of their interrelations.
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Recently an action based on Lie 3-algebras was proposed to describe M2-branes. We study the case of infinite dimensional Lie 3-algebras based on the Nambu-Poisson structure of three dimensional manifolds. We show that the model contains self-dual 2-form gauge fields in 6 dimensions, and the result may be interpreted as the M5-brane world-volume action. 1 e-mail address: [email protected] 2 e...
متن کاملA Chandra X - RAY STUDY OF THE GLOBULAR CLUSTER M 80
We report our analysis of a Chandra X-ray observation of the rich globular cluster M80, in which we detect some 19 sources to a limiting 0.5-2.5 keV X-ray luminosity of 7 × 10 ergs s within the half-mass radius. X-ray spectra indicate that two of these sources are quiescent low-mass X-ray binaries (qLMXBs) containing neutron stars. We identify five sources as probable cataclysmic variables (CVs...
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ژورنال
عنوان ژورنال: Sønderjydske Årbøger
سال: 1949
ISSN: 0106-4452
DOI: 10.7146/soenderjydskeaarboeger.v61i2.81079