VSL theories and the Doppler peak

• Type: Article in International Scientific Journal
• Date: 2000

Authors

Avelino, PP (Author) FCUP; Martins, CJAP (Author) Other; Rocha, G (Author) Other

Journal

Title: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

Vol. 483

Pages: 210-216

ISSN: 0370-2693

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 35 Citations

Scopus - 34 Citations

Other information

Authenticus ID: P-000-ZR7

DOI: 10.1016/s0370-2693(00)00567-0

Abstract (EN): We discuss constraints on so-called 'varying speed of light theories' coming from the physics of the early universe. specifically, we consider the position of the first acoustic peak of the CMB angular power spectrum, showing that the recent determination of its position by various CMB experiments, in particular BOOMERanG/NA, can he used to constrain the value of the speed of light c after the epoch of last scattering. Specifically, we find that far a flat universe and a standard density of baryonic matter a variation in c of up to 4% is consistent with the current observations, The position of the Doppler peal; is fairly sensitive to changes in c, and future observations should dramatically improve this bound. On the other hand, we also find that the maximum baryonic density allowed in VSL theories is about Ohm(B)h(2)similar to 0.06 Ohm(0). We comment on the significance of these results.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7