The Blending Effect in the Measurement of Spectroscopic Binary Spectra
Open Access
- 1 July 1968
- journal article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 141 (1) , 43-55
- https://doi.org/10.1093/mnras/141.1.43
Abstract
When a double line in the spectrum of a binary star is blended, there is an apparent displacement of the lines, which might give rise to serious errors in the measured velocities. The theory of this blending effect is discussed and graphs are presented to display the magnitude of the effect under various conditions. It is also shown that, where stellar rotation is the primary cause of line broadening, blending may give rise to a spurious line tripling, which could conceivably lead to gross misinterpretations of the spectrum.Keywords
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