摘要:

AbstractComparing theM/L‐distribution function of single spiral and irregular galaxies with that of double galaxies (S,S and E,E) from the list of KARACHENTSEV(1974) it can be shown that the mass discrepancy can be ascribed to the skewedness of this frequency function and thus to the strong dependence of the mean value ofM/Lon the dispersion. An unavoidable enlargement of the dispersion by errors of measurement and wrong attachment of objects of the sample always raises the mean ofM/L. This effect could be then mistaken for a mass discrepanc

ISSN:0004-6337    

DOI:10.1002/asna.19762970102

出版商:WILEY‐VCH Verlag    

年代:1976

数据来源: WILEY

摘要:

AbstractA model is suggested which accounts for (i) the observed shape and angular variation of compact radio sources (especially the apparent superrelativistic velocities and the absence of contracting sources), (ii) the flux variation associated with the angular variation, and (iii) all the known cases of apparent occurence of surface brightness exceeding the theoretical upper limit provided by the inverse COMPTONeffect, preserving the usual premises: cosmological origin of the redshift and incoherent synchrotron radiation of electrons. The model consists of a plasma ring expanding with moderate relativistic velocity.It provides two possibilities for estimating the distance of the sources by radio data: from the time dependence of the angular expansion and from the angular diameter and the shape of flux variation. In the context of cosmology this distances are „angular distances”︁ and therefore, if the redshift is also known, the HUBBLEconstant or the acceleration parameterq0may be obtained.The second method is applied to BL Lac yielding approximately 6 Mpc. So the underlying galaxy would be a dwarf system ofM≈︂–13. The active nucleus ofM≈︂ – 16 is rather below the normal quasars. This seems very satisfactory in view of the short time scale of variations in BL Lac compar

ISSN:0004-6337    

DOI:10.1002/asna.19762970103

出版商:WILEY‐VCH Verlag    

年代:1976

数据来源: WILEY

摘要:

AbstractThe distribution of the total numbers of galaxies down to about 18THmagnitude on 84 squares is largely in agreement with the structure of the hypothetic intergalactic absorbing cloud near ι Microscopii found by C. HOFFMEISTER. The counts of galaxies were performed on the WHITEOAKprints covering that region

ISSN:0004-6337    

DOI:10.1002/asna.19762970104

出版商:WILEY‐VCH Verlag    

年代:1976

数据来源: WILEY

摘要:

AbstractA simple algebraic formula describing the enrichment of heavy elements in the interstellar gas is derived. Already very simple assumptions lead to the known result that the amount of heavy elements depends critically on the shape of the luminosity function.

ISSN:0004-6337    

DOI:10.1002/asna.19762970105

出版商:WILEY‐VCH Verlag    

年代:1976

数据来源: WILEY

摘要:

AbstractIt is shown that the proof of theg= o theorem established by KHALATNIKOVand LIFSHITZin general relativity has to be supplemented by additional considerations. The same investigations are made for TREDER'Stetrad theory of gravitation.

ISSN:0004-6337    

DOI:10.1002/asna.19762970106

出版商:WILEY‐VCH Verlag    

年代:1976

数据来源: WILEY

摘要:

AbstractThe period of 0.741285 days for the light variability of the magnetic star HD 133 029 was obtained from UBV observations. The observations of the effective magnetic field by BABCOCKshow variations with a period of 0.7447 days. A small change of the period and a slow change of the magnitude of this magnetic star seems to be present.

ISSN:0004-6337    

DOI:10.1002/asna.19762970107

出版商:WILEY‐VCH Verlag    

年代:1976

数据来源: WILEY

摘要:

AbstractTwelve Ap stars with known periods and fairly large amplitudes were photoelectrically investigated in a ten colour system (λ 3400 to λ 7600 ). The amplitude‐wavelength relations following from the light curves cannot be explained by the influence of the backwarming effect. These relations point to complicated structures in the atmospheres of the peculiar regions of the magnetic st

ISSN:0004-6337    

DOI:10.1002/asna.19762970108

出版商:WILEY‐VCH Verlag    

年代:1976

数据来源: WILEY

摘要:

AbstractThe modern means of computation require mathematical relations in forms which take care of the data directly furnished to the computer by observational instruments. In this communication the general relation of the nthderivative of the function (R) is given.

ISSN:0004-6337    

DOI:10.1002/asna.19762970109

出版商:WILEY‐VCH Verlag    

年代:1976

数据来源: WILEY

摘要:

AbstractThe spin period of COSMOS378 rocket was studied during all its lifetime. An exponential increase of the spin period values is pointed out.

ISSN:0004-6337    

DOI:10.1002/asna.19762970110

出版商:WILEY‐VCH Verlag    

年代:1976

数据来源: WILEY

ISSN:0004-6337    

DOI:10.1002/asna.19762970111

出版商:WILEY‐VCH Verlag    

年代:1976

数据来源: WILEY