ScienceWISE definitions

External resources

• heasarc.gsfc.nasa.gov
• www.cv.nrao.edu

Incoming relations

Outgoing relations

• HI column density is observed in HI survey
• HI column density is related to Neutral hydrogen clouds

Categorization

Synonyms

• Hydrogen column density
• Neutral hydrogen column density
• $N_H$
• $n_H$
• \HI column density