planetary-science-2018-posters-abstracts

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Journal of Astrophysics & Aerospace Technology | ISSN: 2329-6542 | Volume 6

Planetary Science and Particle Physics

International Conference on

August 27-28, 2018 | Boston, USA

Sunyaev-Zeldovich effect as tool to probe fundamental physics and modified gravity

Ivan de Martino

University of the Basque Country, Spain

e used the data on the Cosmic Microwave Background (CMB) temperature anisotropies measured by the Planck satellite and a

sample of X-ray selected clusters with spectroscopically measured redshifts to probe the standard cosmological model and the

underlying theory of gravity. To avoid antenna beam effects, we brought all the maps to the same resolution. We used a CMB template

to subtract the cosmological signal while preserving the Thermal Sunyaev-Zeldovich (TSZ) anisotropies; next, we removed galactic

foreground emissions around each cluster and we masked out all known point sources. Once the cleaning procedure is completed,

we measured the TSZ effect on discs of aperture θ500 and centered at the position of each galaxy cluster in our sample. Then, we

extracted the value of the CMB temperature at galaxy cluster location. With these data we constrained the deviation of adiabatic

evolution of the Universe and the spatial variation of the fine structure constant. Next, we measured the TSZ profile of COMA cluster

and used it to constrain modified gravity models that, in their weak field limit, modify the Newtonian potential. (Up to 250 words)

J Astrophys Aerospace Technol 2018, Volume 6

DOI: 10.4172/2329-6542-C2-021