spectral type

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Related to spectral types: HR diagram

spectral type

or

spectral class

n
(Astronomy) any of various groups into which stars are classified according to characteristic spectral lines and bands. The most important classification (Harvard classification) has a series of classes O, B, A, F, G, K, M, the series also being a scale of diminishing surface temperature

spec′tral type′


n.
a category for classifying a star according to features of its spectrum that indicate its surface temperature and chemical composition.
[1920–25]
References in periodicals archive ?
In a small telescope, 61 Cygni is a lovely, wide pair of yellow-orange points, spectral types K5 and K7, currently separated by 31".
From the effective temperatures we obtain spectral types F0 & K2, which are close to the estimates of Svechnikov & Kuznetsova, (3) F0 & G7IV.
Some spectral types of Supergiant stars were unexpectedly constant.
Eyes with different spectral types of cone cells can distinguish different colors.
For those who remember spectral types by the rhyme "Oh Be A Fine Girl, Kiss Me", or even the extended "Right Now Sweetie", will realise that the L-type occurs nowhere.
The workshops are held every 10 years, and this latest addressed such unanswered questions as the chemical evolution of the different spectral types of white dwarfs, and the excitation of pulsations.
Beyond this, we will use fainter stars and their NIR photometry, drawn from DENIS and 2MASS, if cross-identifications provide reliable spectral types.
A retina with at least ten spectral types of photoreceptors in a mantis shrimp.
Spectral type corresponds to temperature, and Russell drew his 1914 diagram with an ordinary series of spectral types that we now know has temperature decreasing toward the right.
Given the range of possible spectral types this star could, on the face of it, be almost any of the low-amplitude variable stars on the upper main sequence (see Degroote et al.
Other articles survey the current state of research in topics that include astrobiology, sungrazing comets, digital image reconstruction, new spectral types L and T, high-velocity white dwarfs and galactic structure, standard photometric systems, mega-masers and galaxies, and galactic winds.
Five of the sky's 20 brightest stars have spectral types between B0 and B3--hotter than Rigel or Regulus.