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thrush
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Does anybody know a good read/primer that compares the observed cosmological redshift values to predictions made by the relativistic (gravitational) redshift?
Thank you!
Thank you!
thrush said:What I am looking for is a primer on the comparison between the estimated spectral line redshift from say, a star:
Cosmological Doppler shift refers to the redshift or blueshift of light from distant galaxies due to the expansion of the universe. Relativistic Doppler shift, on the other hand, is the change in frequency of light or other waves due to the relative motion between the source and observer, as predicted by Albert Einstein's theory of relativity.
The cosmological Doppler shift is a key piece of evidence for the Big Bang theory, as it demonstrates the expansion of the universe. By studying the redshift of light from distant galaxies, scientists can also determine the distance and age of the universe.
The formula for calculating the relativistic Doppler shift is (1 + v/c) / (1 - v/c), where v is the relative velocity between the source and observer, and c is the speed of light.
Yes, the cosmological Doppler shift can also be observed in the spectra of stars and galaxies within our own Milky Way galaxy. This is known as the "peculiar velocity" of these objects, caused by their motion relative to us.
Astronomers use the Doppler shift to study the movement and distance of celestial objects, as well as to measure the expansion rate of the universe. They can also use the Doppler shift to detect exoplanets by observing the small wobble in a star's spectrum caused by the planet's gravitational pull.