Stellar velocity distribution 



59 



54. In order to get a control of the determinations of the parallaxes in the 

 table XIX I made from the equation (50) a separation of the observations in 

 proper motion. From these results I determined the values of tf-jiS' as well as the 

 positions of the apices. The following table contains the results. 



TABLE XIX. 



The apex solution from the proper motions of stars brighter than magn. 4.9 













Apex 





Class 







»1 W o" 



», S 





5 



»,S:S 



B 



— 0" .00132 



+ O".03O9O 



— 0" .01932 



0". 03647 



272.°8 



4- 32°.o 



0".0078 



A 



+ 0.00212 



4- 0.05903 



— 0.02919 



0.06588 



267.;. 



4-26.3 



0.0158 



F 



+ 0.01366 



+ 0.10244 



— 0.06668 



0.12300 



262.5 



+ 32.8 



0.0299 m 



G 



-f 0.00506 



+ 0.03555 



— 0.03759 



0.05199 



261.9 



4-46.3 



0.0131 



K 



— 0.00842 



4- 0.04934 



— 0.05258 



0.07259 



279.7 



+ 46.3 



0.0176 



M 



— 0.00444 



4" 0.05837 



— 0.03333 



0.06736 



274.4 



+ 29.7 



0.0152 



Magn. <^4.9 



— 0.00117 



4" 0.05428 



— 0.03937 



0.06706 



271.2 



+ 35.9 



0.0163 

















There is a large difference in the value of the declination of the apex for 

 stars brighter than magn. 5. o when determined from radial velocities and proper 

 motions. The former determination gave (see table IV a) for the apex a = 271°.B, 

 § = + 26°.3. The mean error, about two or three degrees, is not sufficient to explain 

 the difference, which no doubt is in some way caused by the systematic motions 

 of the stars. It is also probable that the combined treatment of radial velocities 

 and proper motions is a rather complicate problem, although the solutions from the 

 two sorts ofobservations point approximatively in the same direction 



1 In this table as well as in the tables IV a, IV b, containing the solar velocity results, 

 I have like other authors, defined the components of the sun's relative velocity in such a 

 way that the velocity is considered as negative in relation to the point in the sky, the apex, to- 

 wards which the sun is moving. However, for the solar velocity — S — no signs are given in 

 the tables. 



