Year: 1970
Type: conference-abstract
Abstract: Observing has been underway for several years, at Kitt Peak and Cerro Tololo, of the bright B and A stars, and of the brighter and nearer open clusters, to supply data necessary for calibration of 4-color and Hβ indices in terms of intrinsic color and absolute magnitude, as well as for use in studies of galactic structure. To date, data are on hand – some published, most being prepared for publication – for all O- to G0-type stars brighter than V = 5m.0, for most O- to B5-type to 6m.5, and for most northern hemisphere O- to G0-type to 6m.5. In addition, the following open clusters have been studied: Hyades, Coma, Ursa Major, Praesepe, α Persei, Pleiades, IC 2602, IC 2391, h and χ Persei, NGC 6231, NGC 752, and IC 4665.
Author: D. L. Crawford
Institution: Kitt Peak National Observatory
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4253857832