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Phrases with «photometric redshift»

The phrase "photometric redshift" refers to a method used in astronomy to estimate the distance of galaxies from Earth by analyzing their light. It measures the change in color of the light emitted by the galaxy, which indicates how far away it is. It helps scientists understand the universe's expansion and the distribution of galaxies more accurately. Full definition

Sentences with «photometric redshift»

  • Weak lensing cosmology will be challenging: in addition to highly accurate galaxy shape measurements, statistically robust and accurate photometric redshift (photo - z) estimates for billions of faint galaxies will be needed in order to reconstruct the three - dimensional matter distribution. (arxiv.org)
  • Hubble photometry of one of the three galaxy groups identified at z ~ 8, with the galaxies in the image labeled with their corresponding approximate photometric redshifts. (aasnova.org)
  • By combining these color data, it is possible to make a crude estimate of the distances to the faint background galaxies (called photometric redshift). (technologyalpha.net)
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