Chameleonic contribution to the Sunyaev-Zel'dovich radial profile of the Coma cluster

Journal Article · Tue Feb 15 04:00:00 EST 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.044006· OSTI ID:21504975

Davis, Anne-Christine; Schelpe, Camilla A. O. ^[1]; Shaw, Douglas J ^[2]

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1. Department of Applied Mathematics and Theoretical Physics, Centre for Mathematical Sciences, Cambridge CB3 0WA (United Kingdom)
2. Queen Mary University of London, Astronomy Unit, Mile End Road, London E1 4NS (United Kingdom)

We constrain the chameleonic Sunyaev-Zel'dovich (CSZ) effect in the Coma cluster from measurements of the Coma radial profile presented in the WMAP 7-year results. The CSZ effect arises from the interaction of a scalar (or pseudoscalar) particle with the cosmic microwave background in the magnetic field of galaxy clusters. We combine this radial profile data with SZ measurements towards the center of the Coma cluster in different frequency bands, to find {Delta}T{sub SZ,RJ}(0)=-410{+-}50 {mu}K and {Delta}T{sub CSZ}{sup 204} {sup GHz}(0) > or approx. -50 {mu}K (at 95% confidence) for the thermal SZ and CSZ effects in the cluster, respectively. This leads to an estimated bound on the photon to scalar (or pseudoscalar) coupling strength of g{sub eff} < or approx. (8.3-37.6)x10{sup -10} GeV{sup -1}.

• OSTI ID: 21504975
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 4 Vol. 83; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
COUPLING
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
GALAXY CLUSTERS
INTERACTIONS
MAGNETIC FIELDS
MASSLESS PARTICLES
MICROWAVE RADIATION
PARTICLES
PHOTONS
RADIATIONS
RELICT RADIATION