Antisymmetric Cross-correlation between H I and CO Line Intensity Maps as a New Probe of Cosmic Reionization

Understand

Intensity mapping of the H I 21 cm line and the CO 2.61 mm line from the epoch of reionization has emerged as powerful, complementary, probes of the high-redshift Universe.

• However, both maps and their cross-correlation are dominated by foregrounds.
• We propose a new analysis by which the signal is unbiased by foregrounds, i.e.
• it can be measured without foreground mitigation.