Efectos sistemáticos en futuros experimentos de polarización del CMB para la detección de las ondas gravitacionales primordiales
ABSTRACT: The B-mode pattern of the polarization of the Cosmic Microwave Background (CMB) is the imprint of the Primordial Gravitational Waves (PGW) during the inflation period. Nowadays, several experiments have been dedicated to observe the B-mode polarization signal but it has not been discovered...
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| Format: | master thesis |
| Publication Date: | 2021 |
| Country: | España |
| Institution: | Universidad de Cantabria (UC) |
| Repository: | UCrea Repositorio Abierto de la Universidad de Cantabria |
| Language: | English |
| OAI Identifier: | oai:repositorio.unican.es:10902/22442 |
| Online Access: | http://hdl.handle.net/10902/22442 |
| Access Level: | Open access |
| Keyword: | Cosmic Microwave Background Polarization B-mode Instrumentation Systematic effects El Fondo Cósmico de Microondas Polarización modos B Instrumentación Efectos sistemáticos |
| Summary: | ABSTRACT: The B-mode pattern of the polarization of the Cosmic Microwave Background (CMB) is the imprint of the Primordial Gravitational Waves (PGW) during the inflation period. Nowadays, several experiments have been dedicated to observe the B-mode polarization signal but it has not been discovered yet. In the future, there will be some new experiments specialized in detecting the CMB polarization, touching the 0.001 limit of the parameter r, the tensor-to-scalar ratio which is an indicator about the strength of PGW. The weak signal from B-mode polarization together with the noises and systematic effects make the detection extremely hard. In this paper, we mainly evaluated the different influences of three relevant systematic effects, polar ization angle mismatch, pointing error and beam calibration imperfection acting on four future experiments: LiteBIRD, PICO, Simons Observatory and CMB Stage-4. We showed that to reach an 1% increment in the uncertainty (error) in the parameter r, the polarization angle should be calibrated within 3’-22’ and the pointing direction should be calibrated within 1’-4’, depending on the experiment. On the other hand, the uncertainties in the beam calibration of the sidelobes affect the error in r in a wide range from 0.05% to 200% for the different experiments. |
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