The Square Kilometer Array as a Cosmic Microwave Background Experiment
Fuente:
arXiv
Guardado en:
| Autores principales: | , , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2024
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866913380332208128 |
|---|---|
| author | Zegeye, David Crawford, Thomas Chluba, Jens Remazeilles, Mathieu Grainge, Keith |
| author_facet | Zegeye, David Crawford, Thomas Chluba, Jens Remazeilles, Mathieu Grainge, Keith |
| contents | Contemporary cosmic microwave background (CMB) experiments typically have observing bands covering the range 20 - 800 GHz. Certain science goals, including the detection of $μ$-type distortions to the CMB spectrum and the characterization of low-frequency foregrounds, benefit from extended low-frequency coverage, but the standard CMB detector technology is not trivially adaptable to radio wavelengths. We propose using the upcoming Square Kilometer Array (SKA) as a CMB experiment, exploiting the immense raw sensitivity of SKA, in particular in single-dish mode, to measure medium-to-large-angular-scale modes of the CMB at radio wavelengths. As a worked example, we forecast the power of SKA combined with the upcoming LiteBIRD CMB space mission to constrain primordial non-Gaussianity through measurements of the correlation between anisotropies in the CMB $μ$-distortion, temperature, and $E$-mode polarization fields. We find that adding SKA data significantly improves the constraints on $f_\textrm{nl}$, even for spatially varying low-frequency foregrounds. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_04326 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The Square Kilometer Array as a Cosmic Microwave Background Experiment Zegeye, David Crawford, Thomas Chluba, Jens Remazeilles, Mathieu Grainge, Keith Cosmology and Nongalactic Astrophysics Contemporary cosmic microwave background (CMB) experiments typically have observing bands covering the range 20 - 800 GHz. Certain science goals, including the detection of $μ$-type distortions to the CMB spectrum and the characterization of low-frequency foregrounds, benefit from extended low-frequency coverage, but the standard CMB detector technology is not trivially adaptable to radio wavelengths. We propose using the upcoming Square Kilometer Array (SKA) as a CMB experiment, exploiting the immense raw sensitivity of SKA, in particular in single-dish mode, to measure medium-to-large-angular-scale modes of the CMB at radio wavelengths. As a worked example, we forecast the power of SKA combined with the upcoming LiteBIRD CMB space mission to constrain primordial non-Gaussianity through measurements of the correlation between anisotropies in the CMB $μ$-distortion, temperature, and $E$-mode polarization fields. We find that adding SKA data significantly improves the constraints on $f_\textrm{nl}$, even for spatially varying low-frequency foregrounds. |
| title | The Square Kilometer Array as a Cosmic Microwave Background Experiment |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2406.04326 |