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 |
À l'intérieur du livre
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Page 38
... Wolf - Rayet hydrogen envelope star ; B. D. + 30 ° , 3639 , magn . 9.3 While the spectroscope has shown the varying sizes of the monochromatic images of this object , the direct photographs , ranging in exposure time from 10s to 30m ...
... Wolf - Rayet hydrogen envelope star ; B. D. + 30 ° , 3639 , magn . 9.3 While the spectroscope has shown the varying sizes of the monochromatic images of this object , the direct photographs , ranging in exposure time from 10s to 30m ...
Page 72
... Wolf - Rayet stars . These stars are likewise a very rare type , fully as uncommon , relatively to the total number of the stars , as are the planetaries , and their proved connection with the planetary nebulae gives us no assistance in ...
... Wolf - Rayet stars . These stars are likewise a very rare type , fully as uncommon , relatively to the total number of the stars , as are the planetaries , and their proved connection with the planetary nebulae gives us no assistance in ...
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
... Wolf - Rayet type ; and in 1914 Dr. Paddock called our attention to the fact that the nuclear star is of the Wolf - Rayet type , as indicated by his measured wave lengths of the broad bright bands in the 4600-4700A region . The HB line ...
... Wolf - Rayet type ; and in 1914 Dr. Paddock called our attention to the fact that the nuclear star is of the Wolf - Rayet type , as indicated by his measured wave lengths of the broad bright bands in the 4600-4700A region . The HB line ...
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