Date: miércoles; 26 de junio –  14:30 hrs. (Chile Continental) –  vía online

Speaker:  Dra. Cristina Mondino, Perimeter Institute (Waterloo, Cánada)

Title:   “Axion-Induced Patchy Screening of the CMB”

Abstract:

Cosmic Microwave Background (CMB) photons can undergo resonant conversion into axions in the presence of magnetized plasma distributed inside nonlinear large-scale structure (LSS). This process leads to axion-induced patchy screening: secondary temperature and polarization anisotropies with a characteristic non-blackbody frequency dependence that are strongly correlated with the distribution of LSS along our past light cone. I will discuss how to compute the axion-induced patchy screening contribution to two- and three- point correlation functions that include CMB anisotropies and tracers of LSS within the halo model. I will then show that a search for this axion signal using existing data from Planck and the unWISE galaxy catalogue would be complementary to the most sensitive existing astrophysical axion searches, for a decade of axion masses around 10^-12 eV. Observations from a future survey such as CMB-S4 could extend this reach by almost an additional order of magnitude.

Unirse a la reunión Zoom con nombre y apellido (with name and surname):

https://reuna.zoom.us/j/87161425888?pwd=MWFZUFNQRnI4MXo1QzFLdGpJblllZz09

 ID de reunión: 871 6142 5888

Código de acceso: 100126

NOTE:  The seminars are uploaded in the youtube channel UTFSMHEP Seminars:   https://www.youtube.com/channel/UCYq1A4y7pCHqovaXsrtd6hg