Emission-line stars in the Canis Major star-formation region.

Using the Schmidt telescope of the Kiso Observatory, H-alpha-emission stars have been surveyed in the Canis Major star-formation region and its adjacent reference area. In the area of about 58 square degrees a total of 179 H-alpha-emission stars have been found in the magnitude range between V = 6 and 15 with a majority in the V = 11-14 range. Based on the color properties and on the location relative to the CMa R1 association, the stars are provisionally classified into two main groups of early-type H-alpha-emission stars and of T Tauri candidates. It is found that the early-type H-alpha-emission stars are distributed rather uniformly over the survey area in contrast to the group of T Tauri candidates which show good coincidence with the CMa R1 association in the surface distribution.