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The main causes of electromagnetic redshift in astronomy and cosmology are the relative motions of radiation sources, which give rise to the relativistic Doppler effect, and gravitational potentials, which gravitationally redshift escaping radiation.
'Red shift' is a key concept for astronomers. The term can be understood literally - the wavelength of the light is stretched, so the light is seen as 'shifted' towards the red part of the spectrum. Something similar happens to sound waves when a source of sound moves relative to an observer.
4 de jun. de 2018 · Ben Hoyle. Nature Astronomy 3 , 212–222 ( 2019) Cite this article. 2143 Accesses. 113 Citations. 14 Altmetric. Metrics. Abstract. Since more than 70 years ago, the colours of galaxies derived from...
- Mara Salvato, Olivier Ilbert, Ben Hoyle
- 2019
26 de feb. de 2008 · This article discusses the history of the redshift, and how its interpretation varies between different cosmological theories, including the Big Bang theory and some of its most famous rivals, the Steady State theory and Tired Light theory, and aims to highlight a few of the problems still existing.
- 250KB
- 16
The paper shows that the commonly used Friedmann-Lemaitre-Robertson-Walker (FLRW) metric describing the expanding Universe must be modified to properly predict the cosmological redshift. It is proved that the change in the frequency of redshifted photons is always connected with time dilation, similarly as for the gravitational redshift.
25 de abr. de 2012 · Article history. PDF. Split View. Cite. Permissions. Share. Abstract. Cosmological redshift z grows as the Universe expands and is conventionally viewed as a third form of redshift, beyond the more traditional Doppler and gravitational effects seen in other applications of general relativity.
6 de jun. de 2019 · Infographic titled “What is Cosmological Redshift?” explains cosmological redshift, or the stretching of light waves due to the expansion of space between galaxies, with text and diagrams. The infographic is divided into three parts with the following headers:
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