636 



Tables 828-830 



TABLE 828. — High-Density Stars. White Dwarfs 



Class 



Sirius B F 



o 2 Eridani B Ao 



Procyon B 



Van Maanen's * F 



Visual 

 abs. mag. 



"•3 



II.2 



16. 

 14-3 



Density 



o.5X io 5 g/cm : 

 i.o X io B " 



4Xio 5 



Radius 

 sun = I 



•034 

 .019 



.007 



Mass 



Smallest star known, about the size of the earth. 



TABLE 829. — Low-Density Stars. Giants 



Class 



a Scorpii A cMo 



a Orionis cMo 



j8 Pegasi gMs 



a Tauri gKs 



(Taken by permission from Russell, Dugan, and Stewart, Astronomy, Ginn & Co., 1927.) 



TABLE 830. — High-Temperature Stars. High-Luminosity Stars 



(Plaskett, M. N. 90, 616, 1930. Payne, Stars of high luminosity, 1930. Pearce, Pub. 

 Dom. Astron. Obs., 3, 302, 1926.) 



Draper Catalogue, 0.1% O; 0.3% Bo to B2; 1% B3-B5. Stars of highest temperature, 

 greatest mass, highest luminosity, greatest distance from sun. Masses 5, O type, 

 43 X sun's ; 10, Bo to B2, 15 X sun's ; 12, B3, B5, 6 X sun's. 



Note. — See Russell, The Constitution of the Stars, Science, 77, 65, 1933. 

 Smithsonian Tables 



