H I Properties of Field Galaxies at $\mathbf{z}\approx 0.2$-0.6: Insights into Declining Cosmic Star Formation

David DePalma, Neeraj Gupta, Hsiao-Wen Chen +18

We report statistically significant detection of H I 21-cm emission from intermediate-redshift ($z\approx 0.2$-0.6) galaxies. By leveraging multi-sightline galaxy survey data from t…