blue shift

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blue shift

or

blueshift,

in astronomy, the systematic displacement of individual lines in the spectrumspectrum,
arrangement or display of light or other form of radiation separated according to wavelength, frequency, energy, or some other property. Beams of charged particles can be separated into a spectrum according to mass in a mass spectrometer (see mass spectrograph).
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 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 effectDoppler effect,
change in the wavelength (or frequency) of energy in the form of waves, e.g., sound or light, as a result of motion of either the source or the receiver of the waves; the effect is named for the Austrian scientist Christian Doppler, who demonstrated the effect
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. The blue shift is the opposite of the red shiftred shift
or redshift,
in astronomy, the systematic displacement of individual lines in the spectrum of a celestial object toward the red, or longer wavelength, end of the visible spectrum. The effect was discovered by V. M. Slipher of Lowell Observatory.
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. Blue shifted celestial bodies are quite rare. Of the billions of known galaxies, only about 100, including the AndromedaAndromeda,
in astronomy, northern constellation located to the NE of Pegasus and to the S of Cassiopeia. Its brightest star, Alpheratz (Alpha Andromedae), marks the northeast corner of the Great Square in Pegasus.
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 galaxy, are blue shifted.
The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/

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 ?
Our results suggest that anthocyanins are unstable at high temperature, which caused a decrease in fluorescence intensity and red- and blue-shifts in maximum emission wavelengths.
It was observed that the water addition in all organic solvents studied in the present work (acetonitrile, ethanol, glycerol and dioxane) resulted in the formation of MB dimers (D), which presented a blue-shift band in comparison to monomer (M).
It can be demonstrated that the titanate samples exhibit a sharp optical absorption peak, and the blue-shifted relative to the bulk titania.
Compared with rGO, the D band was blue-shifted by 4 [cm.sup.-1] while the G band was blue-shifted by 10 [cm.sup.-1] in nanocomposites.
Moreover, the polaron absorption peaks for the c-PAn/Si[O.sub.2] hybrids exhibit a blue-shift phenomenon as compared with that of the c-PAn compound.
To further get a thorough understanding of the influence of the SS effect on the blue-shift DW generation, Figure 4 indicates, on the basis of the two cases of the SS effect are included or not, the frequency detuning and relative average intensity of the blue-shift DW plotted as a function of negative TOD coefficient.
Conforme alguns trabalhos [23-25], a forca de interacao apresenta certa influencia no perfil do deslocamento vibracional da especie H--X, em que sistemas forte e fracamente ligados provocam o surgimento dos efeitos blue-shift e red-shift, respectivamente.
The prepared CdS nanoparticles have a blue-shift to higher energy which shows a typical quantum confinement effect.
The low energy MLCT band at 514 nm of JJ-7 is 10 nm blue-shifted relative to that of N719 (524 nm).
Since the center-frequency of CMB is much lower than extra-galactic-light, the cumulative-phase-alteration results in red-shift; and since the center-frequency of CMB is higher than the radio-frequency-signals (2110 MHz for the uplink from Earth and 2292 MHz for the downlink to Earth) used to measure velocity of Pioneer-10, Pioneer-11, Galileo and Ulysses space-probes, the cumulative-phase-alteration resulted in blue-shift, leading to the interpretation of deceleration of these space-probes.
The work has direct implications for cosmology and shows in particular that the erratic changes between red- and blue-shift directions in the early universe were in fact chaotic.