Séminaire Univers / |
| « High-accuracy polarization measurements at millimeter and sub-millimeter wavelengths from ground and space » |
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Alessia Ritacco |
| Multi-wavelength polarization observations at different angular resolutions are fundamental to probe a number of astrophysical processes from galactic to cosmological scales. In particular ?dust polarization measurements at intermediate and high angular resolution of filamentary regions in our galaxy are the key to disclose the role of the magnetic fields played in the star formation process?. On the other hand the search for the ?cosmic microwave background (CMB) polarization B-modes signal, to unveil the primordial universe, drives the motivation of technological developments and advances in data analysis techniques. The measurement of these very weak polarization signals requires an unprecedented sensitivity, a high control of the systematic effects generated by the instruments, as well as a very precise calibration. In this talk I will overview the progress in the field to overcome these difficulties made in the context of the NIKA2 camera, which observes from the IRAM 30m telescope in Spain, and also the development of the future satellite LiteBIRD. |
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mardi 22 juin 2021 - 11:15 Webinaire Institut d'Astrophysique de Paris |
| Pages web du séminaire / Seminar's webpage |