摘要:

AbstractIt is shown that the primordial entropy of the universe can be generated in the residual phase prior to Calabi‐Yau splitting and following the passing to the field theory limit of the heterotic super‐string in ten space‐time dimensions, wherein matter is represented by either a radiative equation of state or the equation of state for stiff m

ISSN:0004-6337    

DOI:10.1002/asna.2113110102

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractThis catalogue is a compilation of references of publications with photometric data in and around non‐Abell clusters of galaxie

ISSN:0004-6337    

DOI:10.1002/asna.2113110103

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

Abstract36 objects with mainly negative (U—B) indices were investigated for variability and proper motions. 10 objects with significant or suspected proper motions and 8 variable objects were detected. Using these criteria, it was possible to separate white dwarfs from quasi‐stellar objects to some ext

ISSN:0004-6337    

DOI:10.1002/asna.2113110104

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractNumerical calculations support the conjecture that high velocity stars born in or near the rotating disk are not distributed spherically throughout the galaxy. Instead an empty funnel region forms around the rotation axis of the galaxy, where no stars reside. The funnel appears only for high velocity stars, such as old pulsars. Within about 50 kpc distance from the galactic center the funnel shape is almost not dependent on the existence of a massive corona.

ISSN:0004-6337    

DOI:10.1002/asna.2113110105

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

ISSN:0004-6337    

DOI:10.1002/asna.2113110106

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

ISSN:0004-6337    

DOI:10.1002/asna.2113110107

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractSince 1971 the magnetic Ap star 52 Her has been investigated with respect to its magnettic field and radial velocity on the observational basis of 140 photographic Zeeman spectrograms obtained at the 2m‐telescope in Tautenburg. Additionally, 47 normal spectrograms were used for the determination of the radial velocity only. The technical foundation for observation and measurement is considered. The main purpose of the paper, however, is the documentation of the observations and the measuring results. Deductions drawn from the material assorted here or taken from other sources are put off to following paper

ISSN:0004-6337    

DOI:10.1002/asna.2113110108

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractThe influence of stochastic velocity fields with finite correlation lengths on the formation of spectral lines is taken into account without restrictions to specific velocity models. To construct a perturbation theory treating the influence of stochastic motion on the radiative transfer we start with the stochastic transfer equation for plane‐parallel atmospheres and expand it to an infinite hierarchical system. An appropriate cut‐off of the infinite system admits to achieve exactly the micro‐ and macroturbulent limit at every level of approach. The formalism is derived forn‐point correlations of the absorption coefficient and specialised for 2‐point cor

ISSN:0004-6337    

DOI:10.1002/asna.2113110109

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

ISSN:0004-6337    

DOI:10.1002/asna.2113110111

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractBasing on radio measurements from different stations the paper presents a compilation of observations and resultinng questions concerning the interpretation of some remarkable features of the solar behind‐limb event on 16th February 1984. The event was related to a very strong relativistic particle emission. Attention is paid to the related microwave radiation stimulating a discussion of the discrimination between plasma and gyromagnetic radiation being important for plasma diagnostics. Another outstanding feature is the occurrence of a spectacular multi‐band U‐shaped type II burst pattern challenging a discussion of possible higher harmonic plasma radi

ISSN:0004-6337    

DOI:10.1002/asna.2113110112

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY