A Discussion of Spectral Classification.
Abstract
A conference was held to consider aspects of current interest in the field of spectral classification. The motivation for the discussion was current work on a new atlas of stellar spectra, based on grating-dispersion spectrograms that include the ultraviolet spectral region. The work on this atlas has raised fundamental, as well as detailed, questions about spectral classification. Under discussion during the first session of the conference were the most sultable spectral resolutions and dispersions for various types of stars; the usefulness of the ultraviolet, red, and infrared regions for spectral classification; the construction and contents of the new atlas; useful new luminosity and spectral-type discriminants; and the philosophy of spectral classification. The second session was devoted to the characteristics, advantages, limitations, and future prospects of photoelectric photometry with filters of narrow- and intermediate-width spectral transmissions and comparisons of this technique with visual spectral classification and spectrographicphotoelectric techniques. In the third session many projects involving spectral classification were stated and discussed; these projects included the compilation and dispersal of data, the need for additional standards, and numerous classes of stars that have not been adequately subclassified.
- Publication:
-
The Astrophysical Journal Supplement Series
- Pub Date:
- April 1963
- DOI:
- 10.1086/190085
- Bibcode:
- 1963ApJS....8...99A