An upper limit to the cosmological variation of Planck's constant derived from the spectrum of the microwave background radiation.
Abstract
Summary. The blackbody spectrum of the microwave background is used to set limits on the cosmological variation of Planck's constant. This approach has accuracy and limitations similar to a method based on photoelectric observations of light from distant galaxies, but extends these observations to a much earlier epoch in the evolution of the Universe.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- November 1977
- DOI:
- 10.1093/mnras/181.1.47P
- Bibcode:
- 1977MNRAS.181P..47B
- Keywords:
-
- Background Radiation;
- Cosmology;
- Microwave Emission;
- Plancks Constant;
- Astronomical Models;
- Black Body Radiation;
- Brightness Temperature;
- Electrophotometers;
- Astrophysics