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Looking for a varying alpha in the cosmic microwave background

P.P. Avelino
(
- Porto U.
)
,
C.J.A.P. Martins
(
- Cambridge U., DAMTP and
- Porto U.
)
,
G. Rocha
(
- Porto U. and
- Oxford U.
)
,
Pedro T.P. Viana
(
- Porto U.
)

Aug, 2000

15 pages

Published in:

Phys.Rev.D 62 (2000) 123508

e-Print:

astro-ph/0008446 [astro-ph]

DOI:

10.1103/PhysRevD.62.123508

Report number:

DAMTP-2000-88

View in:

ADS Abstract Service

reference search93 citations

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Abstract: (arXiv)

We perform a likelihood analysis of the recently released BOOMERanG and MAXIMA data, allowing for the possibility of a time-varying fine-structure constant. We find that in general this data prefers a value of

\alpha

that was smaller in the past (which is in agreement with measurements of

\alpha

from quasar observations). However, there are some interesting degeneracies in the problem which imply that strong statements about

\alpha

can not be made using this method until independent accurate determinations of

\Omega_b h^2

and

H_0

are available. We also show that a preferred lower value of

\alpha

comes mainly from the data points around the first Doppler peak, whereas the main effect of the high-

\ell

data points is to increase the preferred value for

\Omega_b h^2

(while also tightening the constraints on

\Omega_0

and

H_0

). We comment on some implications of our results.

References(37)

Figures(0)

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