Studies of the Nebulae: Made at the Lick Observatory, University of California, at Mount Hamilton, California, and Santiago, Chile, Volume 13University of California Press, 1918 - 268 pages |
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Page 38
... stars 1.5 in diameter . Apparently not globular . An irregular rift runs in ... Wolf - Rayet hydrogen envelope star ; B. D. + 30 ° , 3639 , magn . 9.3 While ... stars is less dense near the center than in most clusters of this type . 4 ...
... stars 1.5 in diameter . Apparently not globular . An irregular rift runs in ... Wolf - Rayet hydrogen envelope star ; B. D. + 30 ° , 3639 , magn . 9.3 While ... stars is less dense near the center than in most clusters of this type . 4 ...
Page 72
... stars in general . No very accurate comparison is possible of the relative ratio of the number of the planetary ... Wolf - Rayet stars . These stars are likewise a very rare type , fully as uncommon , relatively to the total number of ...
... stars in general . No very accurate comparison is possible of the relative ratio of the number of the planetary ... Wolf - Rayet stars . These stars are likewise a very rare type , fully as uncommon , relatively to the total number of ...
Page 77
... Wolf - Rayet star - planetary nebula B.D. + 30 ° 3639 , by Duncan.1 Concurrently with the inauguration and progress of the programme of determining stellar radial velocities with the D. O. Mills spectrograph - beginning in 1896 - Mr ...
... Wolf - Rayet star - planetary nebula B.D. + 30 ° 3639 , by Duncan.1 Concurrently with the inauguration and progress of the programme of determining stellar radial velocities with the D. O. Mills spectrograph - beginning in 1896 - Mr ...
Page 85
... star in N.G.C. 40 is one of the brighter nuclear stars in the known planetaries . Professor Pickering announced in 1905 , in Harvard Observatory Circular , No. 98 , that the spectrum of this nebula resembles the Wolf - Rayet type ; and ...
... star in N.G.C. 40 is one of the brighter nuclear stars in the known planetaries . Professor Pickering announced in 1905 , in Harvard Observatory Circular , No. 98 , that the spectrum of this nebula resembles the Wolf - Rayet type ; and ...
Page 150
... Wolf - Rayet star . In that the star possesses a hydrogen envelope about 5 " in diameter , means of long exposures with an efficient spectrograph , has been able to show that the object gives exceedingly faint nebular bright lines N1 ...
... Wolf - Rayet star . In that the star possesses a hydrogen envelope about 5 " in diameter , means of long exposures with an efficient spectrograph , has been able to show that the object gives exceedingly faint nebular bright lines N1 ...
Autres éditions - Tout afficher
Studies of the Nebulae: Made at the Lick Observatory, University ..., Volume 13 Lick Observatory,Joseph Haines Moore Affichage du livre entier - 1918 |
Expressions et termes fréquents
appears bright bands bright lines brighter Campbell N₁ central portion central star continuous spectrum dark lane DETAILS OF OBSERVATION diameter diffuse nebulosity disk edge elongated exposure faint fainter figure g slitless Greater Magellanic Cloud H N₁ N₂ Haynes hydrogen hydrogen lines inclination km./sec Lick Obs LICK OBSERVATORY line Ia long Hẞ M. T. Exp major axis minor axis Miss Hobe N Miss Hobe N₁ moderately bright Moore Miss Hobe Moore N Moore N₁ N₂ N₁ N₂ Hẞ N₂ HB N₂ Hẞ Hy nearly round nucleus band object Orion nebula photographic planetary nebulae radial velocity region relative intensities ring Ring Nebula rotation s.n. Planetary Scott N Scott N₁ Sept Slit long small nebulae spectra spectrograms spiral nebulae spiral structure star of magn stellar condensations stellar nucleus ultra-violet under-exposed wave-lengths whorls Wolf-Rayet Wolf-Rayet stars Ηβ Ηγ