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The Expanding and Accelerating Universe

  • Conference paper

Part of the Springer Proceedings in Physics book series (SPPHY,volume 99)

Summary

Measuring distances back to a significant portion of the look back time probes the make-up of the Universe, through the effects of different types of matter on the cosmological geometry and expansion. Over the past five years two teams have used type Ia supernovae to trace the expansion of the Universe to a look back time more than 70% of the age of the Universe. These observations show an accelerating Universe which is best explained by a cosmological constant, or other form of dark energy with an equation of state near w = p/ρ = −1. There are many possible lurking systematic effects. However, while difficult to completely eliminate, none of these appears large enough to challenge current results. However, as future experiments attempt to better characterize the equation of state of the matter leading to the observed acceleration, these systematic effects will ultimately limit progress.

Keywords

  • Dark Energy
  • Cosmological Constant
  • Light Curf
  • High Redshift
  • Host Galaxy

These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Schmidt, B.P. (2005). The Expanding and Accelerating Universe. In: Marcaide, JM., Weiler, K.W. (eds) Cosmic Explosions. Springer Proceedings in Physics, vol 99. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-26633-X_69

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