Colloque national CMB-France #2

Session

CMB Spectroscopie

15 nov. 2021, 14:00

1. Distortions Spectrales (théorie)

Cyril Pitrou

15/11/2021 14:00

3. PIXIE

Nabila Aghanim

15/11/2021 14:45

18. BISOU: a balloon project to measure the CMB spectral distortions

Bruno Maffei (IAS)

15/11/2021 15:10

The BISOU (Balloon Interferometer for Spectral Observations of the Universe) project aims to study the viability and prospects of a balloon-borne spectrometer, pathfinder of a future space mission dedicated to the measurements of the CMB spectral distortions, in order to achieve a first measurement. A balloon concept based on a Fourier Transform Spectrometer, covering a spectral range from...

21. Options for an L-class microwave spectroscopy space mission

Jacques Delabrouille (IN2P3)

15/11/2021 15:30

Following on the submission of four coordinated white papers in answer to the ESA "Voyage 2050" consultation of the scientific community, CMB spectral distortions has been identified as one of possible science themes for a future L-class space mission to be launched in the 2035-2050 time frame. I will summarize the science cases, observation requirements, and possible mission profiles in this context.

23. Sensitivity modeling to CMB spectral distortions

Xavier Coulon (IAS)

15/11/2021 16:20

In the context of future missions and instruments dedicated to CMB spectrum measurements, a code modeling sky signals including various emissions (CMB, foregrounds, spectral distortions) has been adapted from previous ones. Combined with a generic spectrometer instrument model in development, preliminary sensitivity estimates and forecasts of the potential spectral distortion observables will...

13. Forecasts on small-scale primordial non-Gaussianity through cross-correlations between CMB and μ-distortion anisotropies

Dr Mathieu Remazeilles (University of Manchester)

15/11/2021 16:40

Multi-field inflation models predict sizeable non-Gaussian primordial perturbations and consequently anisotropic $\mu$-type spectral distortions of the cosmic microwave background (CMB) blackbody. While CMB anisotropies allow us to probe primordial non-Gaussianity at wavenumbers $k \simeq 0.05\,{\rm Mpc}^{−1}$, $\mu$-distortion anisotropies are related to non-Gaussianity of primordial...

15. Spectral studies of the interstellar dust and CMB millimetre emission

Dr Francois-Xavier Désert (IPAG)

15/11/2021 17:00

We advocate R&D in spectroscopy with KIDs to tackle polarized foregrounds in the next generation CMB instruments. In particular, in order to remove the dust polarized emission, the use of low resolution spectrocopy may be required. I will present Grenoble efforts towards that goal.