Other
Scientific paper
Jan 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975cokon..68....1b&link_type=abstract
Communications of the Konkoly Observatory, No. 68 (Vol. VII, 3), p. 1-26 (1975)
Other
Scientific paper
A study has been made of the spatial distribution of early type stars in a region of intermediate galactic latitude. Objective prism plates were used to survey an area of 19.5 sq. degree in Lyra for all stars of spectral type F7 and earlier down to 13th photographic magnitude. 524 stars were detected, for which spectral types and photographic UBV colours were obtained. The stars were separated into four groups - -- spectral class A1 and earlier, A2-A7, A8-F2, and F3-F7 -- and the space densities determined for each group. The space density curves show that the first two groups both appear to be composed of two kinematically distant subsystems, each having a Gaussian velocity distribution but with a ratio of the velocity dispersions of 1.8:1. These two subsystems probably differ in age and it may be significant that the derived age difference, about 3 x10E8 years, is close to the time-difference between two consecutive periods of star formation predicted by the density wave theory of spiral structure. Further observations, however, are needed to rule out other birth mechanisms having the same characteristic time.
No associations
LandOfFree
Distribution of Stars of Spectral Types F7 and Earlier in a Lyra Region does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Distribution of Stars of Spectral Types F7 and Earlier in a Lyra Region, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Distribution of Stars of Spectral Types F7 and Earlier in a Lyra Region will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1750277