Further Reports of Observatories

1966 Astronomical Journal  
Facilities. The completion of the observatory building and superstructure enclosing two 70-fthigh telescope towers represents the major facility addition. The two domes are 24 and 36 ft in diameter, respectively, and will house Boiler and Chivens 16-and 40-in telescopes. The 16-in reflector, made possible largely through a gift from Mr. Hans D. Isenberg and an NSF grant, has already been installed. The 40-in reflector is being furnished entirely by private funds, largely through a gift from the
more » ... Montgomery Ward Foundation, and is scheduled for installation in the late autumn of 1966. The facility is located on the new lake campus of Northwestern University in Evanston. The Lindheimer Astronomical Research Center building has yet to be constructed ; the observatory bulding represents about one-half of the complete Lindheimer Astronomical Research Center. The new Corralitos Observatory of Northwestern University, built and made possible by a grant from NASA in support of a lunar surface surveil-lance program, has been in full operation during the past year. The Corralitos Observatory houses a 24-in Ferson Optics Inc. reflector. The telescopic facilities of the astronomy department will shortly comprise five telescopes, ranging from 40 to 12 in. in aperture, three of which are located in Evanston, and two near Las Cruces, New Mexico. The old facilities of the Dearborn Observatory continue to be fully occupied. Ground-Based Research. Su-Shu Huang has continued his studies of rotating stars, binaries and planetary systems, as well as on mass-luminosity relations in spiral galaxies. Miss Bautz continued her investigation of the interiors of gravitationally contracting, partially degenerate stars of one solar mass. She is using the Henyey method of approach with a code developed by Schwarzschild and Vila. Hynek completed a study in which he showed that the differences in magnitude, the space motions, and the relative frequency of binary stars in different spectral classes furnish a strong observational support for the theory of stellar evolution. Bahng spent two months at Kitt Peak National Observatory to carry out infrared spectrophotometric observations of late-type stars. Preliminary results were presented at the IAU Colloquium on Late-Type Stars held in Trieste, Italy, June 1966. Observations were made with the Kitt Peak 36-in. telescope in three bands at 1.2, 1.6, and 2.2 ¡jl. The infrared colors show that G, K, and M stars have a continuous energy distribution deviating considerably from that of a blackbody. The deviation may be explained as a result of excess continuum emission near 1.6 ju due to the H~ opacity window in the atmospheres of these stars. The infrared colors of seven carbon stars show a poor correlation with the Morgan-Keenan temperature class. Either the molecular absorption feature in the spectra affect the colors very strongly, or some mechanism of continuous opacity such as the one proposed by Hoyle and Wickremasinghe redistributes the radi-933
doi:10.1086/109989 fatcat:duf4ehqu4fe2lnwapdjh2ge2w4