O(f) Comparison Table

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physical object > natural object > celestial body > star > early star > O star > O(f)

Next emission line star: Oe Up: emission line star, O star Previous emission line star: O((f))

O(f) comparison table

Subject has surface temperature has rotation velocity is a kind of has absorption line has definition has spectral type has lifetime has color has relative abundance

emission line star greater than 1000 Kelvin star

O star 35000 K very high early star He II Very hot blue star, whose spectra is dominated by the lines of singly ionized helium (see Pickering series). (Most other lines are from at least doubly ionized elements, though H and He I lines are also present.) O stars are useful because they are found in dust clouds and virtually define the spiral arms. O, B, A, and early F 3 to 6 million years blue-white rare

O(f) 35000 K very high O star He II O-type stars in which N III is present in emission and He II is weakly present in absorption or emission. 3 to 6 million years blue-white rare

Subject	has surface temperature	has rotation velocity	is a kind of	has absorption line	has definition	has spectral type	has lifetime	has color	has relative abundance
emission line star	greater than 1000 Kelvin		star
O star	35000 K	very high	early star	He II	Very hot blue star, whose spectra is dominated by the lines of singly ionized helium (see Pickering series). (Most other lines are from at least doubly ionized elements, though H and He I lines are also present.) O stars are useful because they are found in dust clouds and virtually define the spiral arms.	O, B, A, and early F	3 to 6 million years	blue-white	rare
O(f)	35000 K	very high	O star	He II	O-type stars in which N III is present in emission and He II is weakly present in absorption or emission.		3 to 6 million years	blue-white	rare

Next emission line star: Oe Up: emission line star, O star Previous emission line star: O((f))