FISICA Y COSMOLOGIA DE LA RADIACION COSMICA DE FONDO

Sergio Torres Arzayúz

doi:10.18257/raccefyn.20(77).1996.3019

Vol. 20 No. 77 (1998), Physical Sciences

Vol. 20 No. 77 (1998)

PHYSICS AND COSMOLOGY OF THE COSMIC MICROWAVE BACKGROUND RADIATION

Physical Sciences

https://doi.org/10.18257/raccefyn.20(77).1996.3019

Published 2024-08-09

Sergio Torres Arzayúz⁺⁻

Sergio Torres Arzayúz

Observatorio Astronómico Nacional. Facultad de ciencias, Universidad Nacional de Colombia. Apartado Aéreo 2584, Bogotá, D.C., y Centro Internacional de Física, Bogotá

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Torres Arzayúz, S. (2024). PHYSICS AND COSMOLOGY OF THE COSMIC MICROWAVE BACKGROUND RADIATION. Revista De La Academia Colombiana De Ciencias Exactas, Físicas Y Naturales, 20(77), 171–181. https://doi.org/10.18257/raccefyn.20(77).1996.3019

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Abstract

The cosmic microwave background radiation (CMB) carries with it information about the prevailing conditions in the early universe. Precise measurements of the CMB in an adequate range of angular scales and frequencies will make it possible to find values for the most important cosmological parameters: curvature, cosmological constant and shape of the primordial fluctuation spectrum. The COBE satellite has made it possible to advance considerably in this task with the measurement of anisotropies at angular scales ≥ 7°. An introduction to the CMB theory is presented, the most recent results from COBE are presented, and a test of open cosmological models and models with cosmological constant is performed using the COBE-DMR maps. The result of this analysis reveals that these date are consistent with open cosmological models favoring a value for the density parameter of Ω=0.8 . The data also allow for a non-zero cosmological constant.

https://doi.org/10.18257/raccefyn.20(77).1996.3019

Keywords

Cosmology | Cosmic Microwave | Background radiation

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