A Study of the II Persei Association.
Abstract
Spectral types from objective-prism plates and photoelectric magnitudes and colors are given for 134 stars in the association near Persei.This material was combined with observations of a few early-type association stars by Harris to form an HR and a color-magnitude diagram. Through the use of Sandage's zero-age main sequence a distance modulus of approximately 8.0 mag., corresponding to a distance of about 400 parsecs, was determined. The maximum age of the association, based on the terminal point of the main sequence, is estimated to be in the range of 4 to 7 miflion years.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- July 1960
- DOI:
- 10.1086/146900
- Bibcode:
- 1960ApJ...132...58S