Stellar groups. II. The ζ Herculis, ɛ Indi and 61 Cygni groups of high-velocity stars

A catalogue of 700 high-velocity stars has been searched for objects that share the well-determined space motions of Herculis (22 stars), E Indi {14 stars) and 61 Cygni (15 stars). The space motions of these groups can be summarized as follows (the Hyades and Sirius Groups of Paper I have been added for comparison): Group A D Vt U V h m km/sec Sirius 184 -14 12 yades 6 18 + 75 440 +40 -18 - 2 Ind 20 44 -427 [ 26, Her 5 48 -165 745 +54 -45 - 6 44 + 67 88 +79 -39 + 6 28 + +92 -53 where the values of (A, D) represent the convergent points of the apparent motions and Vt is the total space velocity of each group with respect to the Sun (the vector space velpdties are in the direction 1=1480, b =00; 1=580, b =00; and b = +900 for U, V, and W respectively). A search through the same catalogue for stars that might be members" of synthetic groups with convergent point at = 900 and Vt= , 88 , and 108 km/sec indicated that only 2 or 3 chance members are expected to be included in each group. The colour-luminosity array for the stars in all three high-velocity groups is very similar to that for the galactic cluster M 67.