Absorption lines of sulphur (S III and S II) in stellar spectra.

1930 ◽  
Vol 72 ◽  
pp. 191
Author(s):  
F. E. Roach
Keyword(s):  
Absorption Lines ◽  
Stellar Spectra

scholarly journals 29. Commission des Spectres Stellaires

1933 ◽  
Vol 4 ◽  
pp. 175-177
Author(s):  
M. H. N. Russell ◽  
MM. Abetti ◽  
Adams ◽  
J. Baillaud ◽  
Bosler ◽  
...  
Keyword(s):  
Solar Spectrum ◽  
Absorption Lines ◽  
Stellar Spectra ◽  
Quantitative Theory ◽  
Complete Survey ◽  
Promising Line

Investigation of stellar spectra has been active during the last four years. Without attempting to make a complete survey, some important researches may be mentioned.The theory of the intensities and contours of absorption lines has been discussed by Eddington, Milne, Pannekoek, Woolley, H. H. Plaskett, and others, and has proved to be difficult. For example, no quantitative theory has yet been developed for the residuai intensity which remains in even the strongest lines, although the physical causes underlying the formation of residual intensities are rather obvious. Study of solar lines with light which has left the surface at different angles shows that the processes which produce the wings and the centre are probably different. The most promising line of attack on this intricate problem appears to be in studies of the solar spectrum, where different regions of the disc may be separately investigated, rather than of integrated starlight. The highest dispersion available, even in solar work, will be none too great.

Magnetic absorption lines in stellar spectra

1994 ◽  
Vol 214 (1-2) ◽  
pp. 93-102
Author(s):  
L. Semionova ◽  
Jorge P�ez ◽  
J. Bonatti
Keyword(s):  
Absorption Lines ◽  
Stellar Spectra

scholarly journals Iron abundances from optical Fe iii absorption lines in B-type stellar spectra

2007 ◽  
Vol 383 (2) ◽  
pp. 729-740 ◽  
Author(s):  
H. M. A. Thompson ◽  
F. P. Keenan ◽  
P. L. Dufton ◽  
C. Trundle ◽  
R. S. I. Ryans ◽  
...  
Keyword(s):  
Absorption Lines ◽  
Stellar Spectra

Note: Absorption Lines of NV in Stellar Spectra

1933 ◽  
Vol 77 ◽  
pp. 299 ◽  
Author(s):  
Cecilia H. Payne
Keyword(s):  
Absorption Lines ◽  
Stellar Spectra

scholarly journals Wolf-Rayet star spectra from 1150 Å to 1200 Å

1999 ◽  
Vol 193 ◽  
pp. 80-81
Author(s):  
Joy S. Nichols ◽  
Jeffrey L. Linsky
Keyword(s):  
Time Series ◽  
Wavelength Region ◽  
Absorption Lines ◽  
Interstellar Absorption ◽  
Stellar Spectra ◽  
New Information ◽  
Rayet Star ◽  
Uv Range

The NEWSIPS-reprocessing of IUE data permits the extraction of spectra to wavelengths as short as 1150 Å. We present representative well-exposed IUE spectra of Wolf-Rayet stars covering the 1150–1220 Å region with a resolution of 0.1 Å. The C III 1175 Å line in WC and some WN stars typically shows a P-Cygni profile, with dacs apparent in time series spectra. Superimposed on the stellar spectra are many strong interstellar absorption lines of N I, Si II and other species. These spectra are a guide to a portion of the wavelength region to be covered by FUSE, and an indication of the new information that will be available in the far-UV range with FUSE.

scholarly journals Neon Absorption Lines in Stellar Spectra

1933 ◽  
Vol 19 (10) ◽  
pp. 879-881 ◽  
Author(s):  
D. H. Menzel ◽  
R. K. Marshall
Keyword(s):  
Absorption Lines ◽  
Stellar Spectra
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