blue shift


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blue shift

blue shift or blueshift, in astronomy, the systematic displacement of individual lines in the spectrum of a celestial object toward the blue, or shorter wavelength, end of the visible spectrum. The amount of displacement is a function of the object's relative velocity toward the observer. Most observed blue shifts are the result of the Doppler effect. The blue shift is the opposite of the red shift. Blue shifted celestial bodies are quite rare. Of the billions of known galaxies, only about 100, including the Andromeda galaxy, are blue shifted.
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blue shift

[′blü ‚shift]
(astronomy)
A displacement of lines in the spectrum of a celestial object toward shorter wavelengths, indicating motion of the object toward the observer.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The MCPA-0.2%PEA/0.1 %PEA matrix showed a small blue shift in the octave of amide II with an approximate value of neat MCPA.
We have shown that the UV irradiation induced a large blue shift of the SPR band, resulted in a sharp and strong SPR band in the DUV region, peaked at 232 nm with a FWHM of 20 nm.
Moreover, it is valuable for further interpretation of CDOM fluorescence origin because it is the same spectral range of excitation where the blue shift of CDOM fluorescence emission is normally observed.
There is a blue shift (hypsochromic shift) as the pH increases from pH 8 to pH 10 due to reduction in size of particles from large size to small size.
SUNDAY 13 Blue shift, PS35, Dorothy Perkins From work to party, this embellished shift makes the transition easy - just add heels!
On Blueberry Hill is a fascinating contender as he returns from 980 days off the track in the Pirelli Blue Shift Standard Open National Hunt Flat Race.
Then there is a blue shift in the frequency of the combination absorption and this indicates that the surface starts acquiring water molecules by adsorption.
The thin (~ 0.50 nm) shells were found to result largely in type I core/shell structures and a blue shift of the absorption spectra.
It was Nancy Ajram's first time at the Dubai World Cup - AKA the world's richest horse race - and she was dressed to impress in a chic black and blue shift dress (yes, we're sure it wasn't white and gold) matched with a beautiful black hat adorned with flowers.
As a representative example, the UV absorption bands of COP-SC4A exhibited blue shift and hyperchromicity with addition of 1-butyl-3-methylimidazolium bromide(C4MIm+Br-), (Fig.
Pictured at the Lexus Design Disrupted Gareth Pugh FASHION show, the 36-year-old is electric in a sleek blue shift with front ruffle and zip detail.