In the previous chapter we saw that a star's color (its color index) reveals its surface temperature, but the color gives us only a rough picture of the nature of the light emitted by stars. Two stars may have the same color index and yet the detailed features of the radiation they ...
Use of the data of remote sensing for definition of hydrophysical parameters of soils of the East and the South of the European Russia I had them find the spectral classes of all of the 9110 bright stars which can be seen in the course of a year with the naked eye at dark sky sites...
This work culminated in the publication of the Henry Draper Catalogue (1924), which lists the spectral classes of 255,000 stars. The stars are divided into 7 classes designated by the letters O, B, A, F, G, K, and M; the hottest stars (O and B) are blue-white in color, while ...
stars: spectral classstars: F-G typeWe present an atlas of a group of bright stars in the range of spectralclasses F--G and luminosity classes I-V. The spectra were obtained with spectralresolution R～15000 within spectral region 4500-6620 A. Typical spectra of starswith different ...
On the heavy-element excess in stars of late spectral classesManinbo (10,000 LivesliteraturehistoryKoreanbiographyIt is suggested that the excess of elements in the 5th and 6th periods of the periodic table in S and some C stars is due to the decay of superdense prestellar matter. Arguments...
A classification of stars by characteristics revealed by study of their spectra; the six classes B, A, F, G, K, and M include 99% of all known stars.McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc. ...
spectral classes Spectral Classes for Main Sequence Stars spectral classification Spectral Classification of Stars spectral color Spectral Concentration spectral density spectral dimension spectral directional reflectance factor spectral emissivity spectral energy distribution ...
Energy levels Cool stars have very few hydrogen atoms in the n = 2 level and so give weak Balmer lines. Very hot stars have more atoms in the n = 3 level. ‘A’ class stars have the right temperature for most of the electrons to be in the n = 2 level. ...
In the present survey paper, we present several new classes of Hochster's spectral spaces "occurring in nature," actually in multiplicative ideal theory, and not linked to or realized in an explicit way by prime spectra of rings. The general setting is the space of the semistar operations (...
Spectral Analysis of Linear Operators Spectral Analysis of Speech Sounds spectral approximation Spectral Band Replication spectral bandwidth spectral centroid spectral characteristic spectral classes spectral classification Spectral Classification of Stars spectral color ...