compact H II region concept from the Astronomy knowledge base

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compact H II region

subject fact

compact H II region has definition A dense (n_e ≥ 10³ cm^-3) H II region of small linear dimensions (≤ 1 pc). has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:30:11.0
is a kind of H II region

H II region has composition ionized hydrogen

nebula is a part of gas 2001-09-27 09:32:19.0
has catalog nebula catalog 2001-09-27 09:30:10.0

celestial body has spectra 2001-09-27 09:30:09.0

physical object has location or center of gravity 2001-09-27 09:27:27.0
has angular momentum
has mass
has velocity
has momentum
has temperature
has volume
has extent
has material

Kinds of compact H II region :

Hourglass Nebula (7 facts) (MyCn18) - A compact H II region in the center of Lagoon Nebula.

compact H II region	has definition A dense (n_e ≥ 10³ cm^-3) H II region of small linear dimensions (≤ 1 pc).
compact H II region	is a kind of H II region
H II region	has composition ionized hydrogen
nebula	is a part of gas
nebula	has catalog nebula catalog
celestial body	has spectra
physical object	has location or center of gravity
	has angular momentum
	has mass
	has velocity
	has momentum
	has temperature
	has volume
	has extent
	has material