spectral classes


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Related to spectral classes: luminosity classes

spectral classes

(spek -trăl) See spectral types.
References in periodicals archive ?
Correlation of the clusters, formed at the previous stage, with spectral classes is carried out by the same principle.
The classification of the different spectral classes of Landsat ETM+ was able to distinguish between the different targets in the Rio Grande Valley (Fig.
Multiple spectral classes of photoreceptors in the retinas of gonodactyloid stomatopod crustaceans.
The spectral classes of the main sequence, in order of decreasing temperature, turned out to be O, B, A, F, G, K, and M.
all the spectral classes were found for all the cone types examined (C1-3, [ILLUSTRATION FOR FIGURE 1C OMITTED]).
OVer the gamut of stars included in this study, which range over spectral classes F through M, Baliunas distinguishes three broad classes of variation: "fairly flat, smooth variation like the solar cycle, and very erratic.
In the last 15 years astronomers have added two new spectral classes, L and T, for even cooler, dimmer dwarfs.
She used an inexpensive homemade spectrograph coupled to a 12-inch telescope and a CCD camera to study the composition of stars and nebulae as well as the spectral classes and temperatures of stars (see www.
The old mnemonic for spectral classes, "Oh Be A Fine Girl (or Guy), Kiss Me," can now be extended with "Lustily (or Lovingly) Tonight.
When finally completed in the 1920s, the resultant Henry Draper Catalogue contained spectral classes of more than 200,000 stars.
These distances have been estimated from their spectral classes and apparent luminosities.
Their spectral classes of M4 and F5 indicate colors of orange and yellow-white, but they seem golden and bluish to me.

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