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Line intensities and special types in B type stars Maunsell, Charles Dudley
Abstract
Photometric measures of absorption line intensities in the spectra of forty-five B stars are given. The plates were taken and measurements made at the Dominion Astrophysical Observatory. Graphs have been prepared showing the intensities plotted against the Henry Draper subtype of the star for the stronger lines. Using these intensity measurements, those published by E. G. Williams, and unpublished measures by R. II. Petrie, criteria for determining spectral type from ratios of the intensities of the stronger lines are suggested. Also, from the variation of Balmer line intensity with luminosity, a method of determining absolute magnitudes is suggested. Spectral types and luminosities as determined from these criteria are given for 133 B type stars for which photometric measures of line intensity are available.
Item Metadata
Title |
Line intensities and special types in B type stars
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1947
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Description |
Photometric measures of absorption line intensities in the spectra of forty-five B stars are given. The plates were taken and measurements made at the Dominion Astrophysical Observatory. Graphs have been prepared showing the intensities plotted against the Henry Draper subtype of the star for the stronger lines. Using these intensity measurements, those published by E. G. Williams, and unpublished measures by R. II. Petrie, criteria for determining spectral type from ratios of the intensities of the stronger lines are suggested.
Also, from the variation of Balmer line intensity with luminosity, a method of determining absolute magnitudes is suggested. Spectral types and luminosities as determined from these criteria are given for 133 B type stars for which photometric measures of line intensity are available.
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Genre | |
Type | |
Language |
eng
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Date Available |
2012-03-21
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0085372
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.