Temperature fluctuations of cosmic microwave background induced by gravitational lensing

Details Temperature fluctuations of cosmic microwave background induced by gravitational lensing Temperature fluctuations of cosmic microwave background induced by gravitational lensing

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986phla..117..285c&link_type=abstract

Physics Letters A, Volume 117, Issue 6, p. 285-288.

Physics

3

Scientific paper

Adopting the accepted interpretation of the cosmic microwave background (CMBR) as a relic of the early hot universe we show that any angular intensity variations existing in the background at the ``last scattering surface'' at the redshift of ~103 will induce bright fluctuations through gravitational lensing by intervening masses. The resulting temperature variations ΔT are estimated for gravitating masses like distant galaxies (z ~ 1) and local dark objects (e.g. population III stars) in our own Galaxy. It is found that the value of ΔT/T produced by the above mechanisms further constrains the theories of galaxy formation. The calculation also limits the amount of matter present in the form of population III objects in the galaxy.

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