Observational Aspects of Galactic Structure: Lecture Notes Reported by ParticipantsAdriaan Blaauw, L. N. Mavridis NATO, 1965 |
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Pagina 8
... wavelength region for which the corrector plate was figured . If this would have been done for the short wavelength region , an equal good optical performance for all wavelength regions 360 mμ could have been obtained , This could be ...
... wavelength region for which the corrector plate was figured . If this would have been done for the short wavelength region , an equal good optical performance for all wavelength regions 360 mμ could have been obtained , This could be ...
Pagina 9
... wavelength bands U , B , V with a wavelength band L , which is centered on 3900 A and has a half- width of 300 A. The L band measures the hydrogen lines He , HC , Hn . This system has the advantage that the color index ( L B ) is well ...
... wavelength bands U , B , V with a wavelength band L , which is centered on 3900 A and has a half- width of 300 A. The L band measures the hydrogen lines He , HC , Hn . This system has the advantage that the color index ( L B ) is well ...
Pagina 3
... wavelength of 912 A. Beyond this wavelength , the absorp- tion coefficient falls off approximately as the cube of the wavelength and the optical depth for a path of 100 parsec can be expected to reach a va- lue of about 20 at 200 A ...
... wavelength of 912 A. Beyond this wavelength , the absorp- tion coefficient falls off approximately as the cube of the wavelength and the optical depth for a path of 100 parsec can be expected to reach a va- lue of about 20 at 200 A ...
Sommario
Ch Fehrenbach La détermination des vitesses radiales | 1 |
H Kienle The 80Inch Karl SchwarzschildTelescope VI 1 9 | 1 |
R H Stoy Current Photometric Systems VIII | 1 |
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A/mm absolute magnitude Astronomy bands Blaauw Blanco brightness calibration carbon stars catalogue Cayrel cepheids champ circular velocity classification color d'une density derived determined deux diagram diamètre disk dispersion distance distribution emission equation été étoiles être faint stars fente field Figure focal galactic center galactic plane galactic structure galactique Galaxy globular clusters halo hydrogen interstellar absorption km/sec l'étoile Large Cloud latitudes longitude main sequence mass measured métaux method Milky nebulae number of stars OB stars objects observations Observatory open clusters optical parallaxes parameters peut photoelectric photographic photometry plaque plates polarization population problem proper motions radial velocities radio ratio reddening region rotation curve RR Lyrae variables S-type S-type stars Schmidt solar motion spectral classes spectral type spectrographe spiral arms spiral structure Stars and Stellar Stellar Systems Strömgren surveys telescope tion vitesses radiales wavelength