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The primordial CH molecule as a possible probe for the first structures formation epoch

Published online by Cambridge University Press:  01 August 2006

J.C. Campos ,
J.C. Saucedo Morales ,
A.A. Lipovka  and
R. Nunes-Lopez
J.C. Campos
Affiliation:
Department of Investigations for Physics, University of Sonora, Rosales y Blvd. Transversal, col. Centro, Edif. 3-I. Hermosillo, Sonora, 83000, MEXICO. email: [email protected]
J.C. Saucedo Morales
Affiliation:
Department of Investigations for Physics, University of Sonora, Rosales y Blvd. Transversal, col. Centro, Edif. 3-I. Hermosillo, Sonora, 83000, MEXICO. email: [email protected]
A.A. Lipovka
Affiliation:
Department of Investigations for Physics, University of Sonora, Rosales y Blvd. Transversal, col. Centro, Edif. 3-I. Hermosillo, Sonora, 83000, MEXICO. email: [email protected]
R. Nunes-Lopez
Affiliation:
Instituto de Astronomia, Universidad Nacional Autnoma de Mexico, Apartado Postal 70 – 264, Ciudad Universitaria Mexico, D.F., CP 04510, MEXICO. email: [email protected]
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Abstract

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The role of primordial CH molecules in the first structures formation epoch is considered. We discuss the plausibility of observing protostructures in the Dark Age epoch of the Universe by studying the rotational structure of the CH molecule. It is stressed that considerable abundances of this molecule could be formed for different Inhomogeneous BBN models, which could lead to observable spectral-spatial fluctuations in the CMBR spectrum. The calculation is carried out for the Lambda-CDM cosmology and for typical first structures physical conditions. The chemical evolution of the structures is followed numerically, and the optical depth for the most important ground rotational transitions of the CH molecule are proposed. It is shown that under reasonable conditions the primordial CH molecule can be observed with mm-telescopes under construction.

Keywords

GalaxiesMoleculesStructure formation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S235: Galaxy Evolution Across the Hubble Time , August 2006 , pp. 413
Copyright
Copyright © International Astronomical Union 2007

References

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