Cleaning foregrounds from single-dish 21cm intensity maps with Kernel Principal Component Analysis

The high dynamic range between contaminating foreground emission and the fluctuating 21cm brightness temperature field is one of the most problematic characteristics of 21cm intensity mapping data. While these components would ordinarily have distinctive frequency spectra, making it relatively easy...

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Veröffentlicht in:	arXiv.org 2021-10
Hauptverfasser:	Irfan, Melis O, Bull, Philip
Format:	Artikel
Sprache:	eng
Schlagworte:	Brightness temperature Cleaning Covariance Data smoothing Emission analysis Frequency spectrum Kernels Linear transformations Mapping Physics - Cosmology and Nongalactic Astrophysics Principal components analysis Temperature distribution
Online-Zugang:	Volltext
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