2026-10-15T03:35:22Z https://www.scidb.cn/oai

10.57760/sciencedb.40859 2026-06-29T16:10:01Z

2026-06-29 H₂CO 6 cm Spectral-Line Observational Dataset of the Cygnus-X Giant Molecular Cloud doi:10.57760/sciencedb.40859 en This dataset contains formaldehyde (H₂CO) 6 cm absorption-line observations and processed results toward the Cygnus-X giant molecular cloud. The dataset mainly includes source coordinates, H₂CO spectra, peak intensity, integrated intensity, central velocity, line width, rms noise, and associated spectral fitting parameters. For selected sources, derived physical parameters, including excitation temperature, optical depth, column density, non-thermal velocity dispersion, and Mach number, are also provided.The dataset can be used to investigate the kinematic properties, turbulence, and physical conditions of cold molecular gas in Cygnus-X, as well as their relationship with star-formation activity. It may also serve as a reference dataset for spectral-line analysis, methodological validation, and statistical studies of H₂CO absorption. Cygnus-X; H₂CO; 6 cm absorption line; Giant molecular cloud ye er na er · yi ma na li PUBLIC https://creativecommons.org/licenses/by/4.0/ dataset Science Data Bank