Of star Comparison Table

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Of star 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

peculiar star greater than 1000 Kelvin early star Star with spectra that cannot be conveniently fitted into any of the standard spectral classifications. Denoted by a p after spectral type. O, B, A, and early F

Of star 35000 K very high peculiar star He II Peculiar O stars in which emission features at λλ4634-4641 from N III and 4686 from He II are present. They have a well-developed absorption spectrum, which implies that the excitation mechanism of the emission lines is selective, unlike that of Wolf-Rayet stars. The spectra of Of stars are usually variable, and the intensities of their emission lines vary in an irregular manner. Of stars belong to extreme Population I. All O stars earlier than 05 are Of. 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
peculiar star	greater than 1000 Kelvin		early star		Star with spectra that cannot be conveniently fitted into any of the standard spectral classifications. Denoted by a p after spectral type.	O, B, A, and early F
Of star	35000 K	very high	peculiar star	He II	Peculiar O stars in which emission features at λλ4634-4641 from N III and 4686 from He II are present. They have a well-developed absorption spectrum, which implies that the excitation mechanism of the emission lines is selective, unlike that of Wolf-Rayet stars. The spectra of Of stars are usually variable, and the intensities of their emission lines vary in an irregular manner. Of stars belong to extreme Population I. All O stars earlier than 05 are Of.		3 to 6 million years	blue-white	rare

Next emission line star: P Cygni star Up: emission line star, O star, peculiar star Previous emission line star: Oef