Vol. XXVIII - 1936

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Vol. XXVIII - 1936

 

PTarO028.A000C001

 

Publications

 

de

 

L'observatorie Astronomique de L'université

 

de Tartu (Dorpat)

 

Tome XXVIII

 

NºNº 1-7 (1934-1936)

 

Nº 1. Stellar Distribution and the Law of Chance. Third paper. By Ernst Öpik with the collaboration of Miss Lydia Pitka. (PDF)

Nº 2. Determination of Colour Equivalents of Stars According to Tikhoff's Method. Second paper. By Robert Livländer, Ernst Öpik and Oskar Silde. (PDF)

 

N_28_2_004

 

Fig. 1. Correlation of violet-blue colour index (UR) and Henry Draper Spectrum

 

(Larger)

 

N_28_2_005a

 

Fig. 2. Correlation of violet-blue colour index (UR) and Mount Wilson spectrum.

 

(Larger)

 

N_28_2_005b

 

Fig. 3. Correlation of violet-blue (UR) and photographic-visual (C) colour indices.

 

(Larger)

 

 

Nº 3. The Densities of Visual Binary Stars. By Jacob Gabovitš and Ernst Öpik. (PDF)

 

N_28_3_011

 

Fig.1. The observed correction of colour as function of spectral type.

Abscissae, spectral type, with numbers of individual stars in parentheses;

ordinates, the TiO correction of colour index.

 

(Larger)

 

N_28_3_012

 

Fig. 2. Density and absolute magnitude. Abscissae, absolute magnitudes;

ordinates, logarithms of density.

 

(Larger)

 

N_28_3_013

 

Fig. 3a. Frequency of density logarithms of the brighter components.

Abscissae, log ρ; ordinates, observed frequency.

 

(Larger)

 

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Fig. 3b. Frequency of density logarithms of the fainter components.

Abscissae,log ρ; ordinates, observed frequency.

 

(Larger)

 

 

 

Nº 4. Ansätze zu einer expansionistischen Kinematik. Von J. Nuut. (PDF)

Nº 5. The TiO Colour Effect, and The Densities of M Stars. By Jacob Gabovitš. (PDF)

Nº 6. Researches on the Physical Theory of Meteor Phenomena. By Ernst Öpik. (PDF)

 I. Theory of the Formation of Meteor Craters.

 II. The Possible Consequences of the Collisions of Meteors in Space.

Nº 7. Über Lichtstrahlung während der Sonnenfinsternis am 21. August 1914 in Üxküll. Von J. Wilip. (PDF)

 

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Fig. 3

 

(Larger)