Towards a multi-dimensional stellar classification system

Details Towards a multi-dimensional stellar classification system Towards a multi-dimensional stellar classification system

Jul 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997balta...6...41s&link_type=abstract

Baltic Astronomy, vol. 6, p. 41

Astronomy and Astrophysics

Astronomy

M Stars, Stellar Spectra, Image Classification, K Stars, Stellar Luminosity, Spectral Line Width, Stellar Color, Astronomical Catalogs, Stellar Parallax

Scientific paper

Practically all the MK spectral types known today are the result of visual inspection of photographic spectra. Two issues related to the MK system remained unanswered all along, namely, the accuracies of the luminosities and intrinsic colors derived from these types, the possibility of doing the classification on the basis of measured spectroscopic criteria such as equivalent widths. The issue of whether classification should be done in a system with more than two dimensions is also addressed. With the Parallax Catalogue of van Altena et al. (1995) and the HIPPARCOS Catalogue, such problems can be analyzed anew. Also, techniques are now available to produce measured spectroscopic criteria in large quantities. The first steps in this direction are discussed here.

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