Importance of high-frequency bands for thermal dust removal in ECHO

Understand

The Indian Consortium of Cosmologists has proposed a cosmic microwave background (CMB) space mission, Exploring Cosmic History and Origin (ECHO).

• A major scientific goal of the mission is to detect the primordial B-mode signal of CMB polarization.
• The detection of the targeted signal is very challenging as it is deeply buried under the dominant astrophysical foreground emissions of the thermal dust and the Galactic synchrotron.
• To facilitate the adequate subtraction of thermal dust, the instrument design of ECHO has included nine dust-dominated high-frequency bands over the frequency range of 220-850 GHz.