Accession Number : AD0236460

Title :   STUDY OF LUMINOSITIES OF LONG-PERIOD VARIABLES.

Descriptive Note : Final rept. 1 Oct 58-31 Dec 59,

Corporate Author : OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS

Personal Author(s) : Keenan, Philip C.

Report Date : FEB 1960

Pagination or Media Count : 6

Abstract : A two-dimensional calssification was extended to more than 50 Mira variables. The need for some independent calibration of the classification in luminosity led to the study of the interstellar D-lines in the variables of high velocity. Individual absolute magnitudes are available for only 2 Mira variables (X Oph and X Mon) in the northern sky, but the agreement of their values with statistical means lends support to the conclusion that the majority of these stars have visual absolute magnitudes near -0.5 to -1.0 at maximum light. The classification suggests that there are a few of higher luminosity that could be termed supergiant variables. Work is reviewed on the absolute magnitude of the Mira variable X monocerotis. (Author)

Descriptors :   CLASSIFICATION, INTENSITY, INTERSTELLAR MATTER, PHOTOGRAPHIC ANALYSIS, SODIUM, SPECTROSCOPY.

Distribution Statement : APPROVED FOR PUBLIC RELEASE