Can dark matter produce a visible Sunyaev-Zel'dovich (SZ) effect?

by Dr Celine Boehm (LAPTH, Annecy)

Wednesday 17 Jun 2009, 11:00 → 12:00 Europe/Zurich

1/1-025 (CERN)

S. Colafrancesco claimed in 2004 that neutralino annihilations could produce a visible SZ effect in clusters of galaxies, thus leading to the exclusion of some values of the neutralino mass and annihilation cross-section. This conclusion was however questioned in a recent paper by Yuan et al. We will revisit the argument and discuss whether or not one can expect a visible effect from dark matter candidates in general.

References:

• "SZ effect from Dark Matter annihilation", by S. Colafrancesco, [arXiv:astro-ph/0405456]
• "Dark matter annihilation and non-thermal Sunyaev-Zel'dovich effect: I. galaxy cluster", by Q. Yuan et al., [arXiv:0902.4294 (astro-ph)]
• "Clarifying the covariant formalism for the SZ effect due to relativistic non-thermal electrons", by Celine Boehm, Julien Lavalle, [arXiv:0812.3282 (astro-ph)]