Signatures of first cosmological structures in the CH rotational lines

Julio C. Campos-García, Anton A. Lipovka, Julio C. Saucedo

Research output: Contribution to conferencePaper


In the present work we discuss the possible signatures of first cosmological structures formed at the end of the dark-age epoch (z ∼ 40-20). These correspond to the spectral-spatial fluctuations in the cosmic microwave background radiation (CMBR), produced by elastic resonant scattering of CMBR photons by the rotational structure of the CH molecules formed in proto-structures. The chemical kinetic of CH molecule is calculated in the expanding homogeneous medium and applied to proto-structures in their linear stage of collapse, whose properties were estimated by using a top-hat spherical approach and Lambda-CDM cosmology. It is shown that the optical depth in the rotational structure of the CH molecule for some cases of non-standard BBN (NBBN) is rather high and could be observed with radio telescopes under construction. Possible future observations are discussed as a crucial test for NBBN models. © 2007 American Institute of Physics.
Original languageAmerican English
Number of pages1
StatePublished - 25 Sep 2007
EventAIP Conference Proceedings -
Duration: 25 Sep 2007 → …


ConferenceAIP Conference Proceedings
Period25/09/07 → …


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