Observing the Universe at millimetre wavelengths

Session

Thursday P2

29 juin 2023, 13:50

LPSC Grenoble

Présidents de session

Thursday P2

• Federico Nati (University of Milano-Bicocca)

Thursday P2

• Nabila Aghanim (Institut d'Astropysique Spatiale)

63. New techniques to control instrumental Systematics for CMB experiments

Dr Gabriele Coppi (Università degli studi Milano-Bicocca)

29/06/2023 13:50

Cosmic Microwave Background experiments need to measure instrumental systematics very accurately to achieve their scientific goals. As a result of that, it is necessary to properly characterize these telescopes. However, natural sources cannot be used to calibrate all the properties of the instrument but we need to complement these with artificial sources. For this reason, we developed the...

40. Millimeter-Wave and Far-IR Kinetic Inductance Detectors at NIST-Boulder

Jason Austermann (NIST-Boulder)

29/06/2023 14:15

Kinetic inductance detectors carry the promise of a truly scalable detector solution, providing a practical path to filling the large and densely populated focal planes envisioned for future far-infrared and millimeter-wave instruments. At the same time, this detector technology shows promise in meeting the ambitious sensitivity and dynamic range specifications required to achieve the next...

54. Measuring the CMB primordial B-modes with Bolometric Interferometry: status and future prospects of the QUBIC experiment

Aniello Mennella (Università degli Studi di Milano - Istituto Nazionale di Fisica Nucleare)

29/06/2023 14:40

The Q\&U Bolometric Interferometer for Cosmology (QUBIC) is the first bolometric interferometer to measure the primordial B-mode polarization of the Cosmic Microwave Background (CMB).

Bolometric interferometry is a novel technique that combines the sensitivity of bolometric detectors with the control of systematic effects that is typical of interferometry, which are both key features in...

65. Overview of the LiteBIRD project

Louise Mousset (IRAP)

29/06/2023 15:00

LiteBIRD, the Lite (Light) satellite for the study of B-mode polarization and Inflation from cosmic background Radiation Detection, is a space mission aimed to probe primordial cosmology and fundamental physics. The Japan Aerospace Exploration Agency (JAXA) selected LiteBIRD in May 2019 as a strategic large-class (L-class) mission, with an expected launch at the end of the decade. LiteBIRD...

44. Early High-resolution Millimeter-wave Maps and Instrument Properties of TolTEC

Joseph Golec (University of Chicago)

29/06/2023 15:20

TolTEC is a polarization-sensitive camera at millimeter wavelengths with unprecedented sensitivity at 5-11 arcsecond resolution in three photometric bands. TolTEC achieved first-light on the 50 meter Large Millimeter Telescope in July 2022 just prior to a planned summer telescope maintenance shutdown, and began commissioning observations when the telescope resumed observations in December...

28. Compton-y distortion: CMB constraints and new prospects with CIB

Alina Sabyr (Columbia University)

29/06/2023 16:20

The thermal Sunyaev-Zel’dovich effect refers to a spectral distortion in the cosmic microwave background (CMB) due to the inverse-Compton scattering of CMB photons off free, energetic electrons present in the Universe. It is primarily sourced by the electrons in the intracluster medium with smaller contributions from the intergalactic medium and the epoch of reionization. The amplitude of its...

74. Towards Instruments Measuring Spectral Distortions of the Cosmic Microwave Background

M. Xavier COULON (IAS-CNRS)

29/06/2023 16:40

The measurement of the Cosmic Microwave Background spectrum made by COBE/FIRAS in the 1990s showed that the CMB spectral energy distribution is close to a perfect blackbody. However, the CMB spectrum contains tiny departures from a perfect blackbody to $\mathrm{\Delta }I/I\simeq {10}^{-5}$, referred to as spectral distortions. CMB spectral distortions encode information about the full thermal history of...

73. The advantage of Bolometric Interferometry for controlling Galactic foreground contamination in CMB primordial B-modes measurements

Elenia Manzan (University of Milan, INFN)

29/06/2023 17:00

In the quest for the faint primordial B-modes of the Cosmic Microwave
Background, three are the key features for any present or future experiment: an utmost sensitivity, excellent control over instrumental systematic effects and over Galactic foreground contamination.
Bolometric Interferometry (BI) is a novel technique that matches them all by combining the sensitivity from bolometric...

67. A “temperature inversion” estimator to detect the screening of the CMB by the large-scale structure

Abhishek Maniyar

29/06/2023 17:20

Electrons with certain optical depth within galaxy groups and clusters Thomson scatter CMB photons out of and into the line of sight, an effect known as patchy screening. In this talk, I will propose a new "temperature inversion" (TI) estimator to detect this screening effect of the electrons. Our estimator is analogous to the 'shear only' and 'gradient inversion' estimators of CMB lensing. I...