768 



TABLE 879.— SPECTROSCOPIC ECLIPSING BINARIES (concluded) 



Huffer and Eggen, Astrophys. Journ., vol. 106, p. 313, 1947. f, Luyten-Struve-Morgan, Yerkes Publ., vol. 7, 



pt. 4, 1939. g, McDonald, Publ. Dominion Astrophys. Obs., vol. 7, p. 135, 1949. h, Geodicke, Michigan 



Publ., vol. 8, No. 1, 1939. i, Popper, Astrophys. Journ., vol. 97, p. 394, 1943. j, Gaposchkin, Astron. 



Journ., vol. 53, p. 112, 1948. k, Stibbs, Monthly Notices, Roy. Astron. Soc, vol. 108, ji. 398, 1948. 1, Joy 



and Sitterly, Astrophys. Journ., vol. 73, p. 77, 1931. m, Gaposchkin, Publ. Astron. Soc. Pacific, vol. 55, p. 



192, 1943. n, Baker, Lick Obs. Bull., vol. 12, p. 130, 1926. o, Eggen (private communication). p, 



Kopal, Astrophys. Journ., vol. 103, p. 310, 1946. q, Shapley, Princeton Contr., No. 3, 1915. r, Huffer 



and Kopal, Astrophys. Journ. (in press). s, Gaposchkin, Harvard Bull., No. 917, 1943. t, Baker, Laws 



Bull., No. 2, p. 173, 1916. a, Wylie, Astrophys. Journ., vol. 56, p. 232, 1922. v, Huffer and Eggen, 



Astrophys. Journ., vol. 105, p. 217, 1947. w, Kopal, Astrophys. Journ., vol. 93, p. 92, 1941. x, Joy, 



Astrophys. Journ., vol. 71, p. 336, 1930. y, Pierce, Astron. Journ., vol. 48, p. 113, 1939. z, Piotrowski, 



Astrophys. Journ., vol. 108, p. 510, 1948; Smith. Astrophys. Journ., vol. 108, p. 504, 1948. a 1, McDiarmid, 



Princeton Contr., No. 7, 1924. b 1, Wood, Astrophys. Journ., vol. 110, p. 465, 1949. c 1, Fracastaro, 



Arcetri Publ., vol. 55, p. 37, 1937. d 1, Sahade and Cesco, Astrophys. Journ., vol. 102, p. 128, 1945. 



e 1, Baker, Laws Bull., No. 31, 1921. f 1, Wachmann, Astron. Journ., vol. 259, p. 32i, 1936. g 1, Struve, 



Astrophys. Journ., vol. 106, p. 255, 1947. h 1, Gaposchkin, Astrophys. Journ., vol. 104, p. 376, 1946. 



i 1, Joy, Astrophys. Journ., vol. 64, p. 293, 1926. j 1, Sitterly, Princeton Contr., No. 11, 1930. k 1, 



Wood, Princeton Contr., No. 21, 1946. 1 1, Huffer, Astrophys. Journ., vol. 79, p. 369, 1934. m 1, Gaposch- 



kin, Harvard Bull., No. 907, 1938. n 1, Gaposchkin, Astrophys. Journ., vol., 104, p. 370, 1946. p 1, 



Eggen, Astrophys. Journ., vol. 108, p. 15, 1948. q 1, Plant, Diss. Leiden, 1939. r 1, Fowler, Astrophys. 



Journ., vol. 52, p. 261, 1920. s 1, Chang, Astrophys. Journ., vol. 107, p. 96, 1948. t 1, Kuiper, Astrophys. 



Journ., vol. 88, p. 456, 1938. 



TABLE 880.— SPECTROSCOPIC BINARY STARS* 



These binary systems were discovered and investigated by measuring the Doppler dis- 

 placements of the spectrum lines. All except the widest systems are too close to each 

 other to be observed as double stars through the telescope. The data given are from J. H. 

 Moore's "Fifth Catalogue of Spectroscopic Binaries." wl In the table a designates the semi- 

 major axis of the orbit in kilometers and refers to the center of gravity of the system; 

 i is the inclination of the orbit plane to the plane of the sky ; and m designates the mass of 

 each component. When both components of a binary system are bright enough to record 

 their spectral lines, individual mass functions can be derived and these are shown in 

 column 8. When only the spectrum of one star is visible a more complicated mass function 

 is obtained involving the total mass of the system and the mass ratio. Several systems in 

 the table are eclipsing stars and for them the inclination is nearly 90? Hence for them 

 the quantity sin 3 1 in columns 8 and 9 is nearly equal to 1. 



t 



Star Mag 



13 Ceti A 5.6 



13 Ceti AB 5.2 



a Ursa Minoris 2.5 



t Aurigae 3.1 



f Turigae 4.9 



a Aurigae 2 



fVV Ononis ab 5.3 



\VV Ononis abc 



/3 Aurigae 2.1 



29 Canis Majoris .... 4.5 



a 1 Geminorum 2.8 



a 2 Geminorum 2.0 



a 1 -)- a" Gem 



YY Gem 9.0 



V Puppis 4.1 



W Ursae Majoris ... 8.3 



a Virginis 1.2 



Aquilae 3.4 



Y Cygni 7.0 



* Prepared by O. Struve, University of California, Berkeley. 

 -™ Lick Obs. Bull. No. 521, 1949. 

 t System of Castor. 



SMITHSONIAN PHYSICAL TABLES 



