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On the Practical Application of the MK and Related Spectral-Classification Systems to Spectrograms of Various Resolutions

Published online by Cambridge University Press:  12 April 2016

A. Ardeberg
A. Ardeberg*
Affiliation:
Lund Observatory

Abstract

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For MK classification of program field stars the “normal” observer is confronted with a number of practical problems, rendering classification on the true MK system very difficult. These problems concern completeness of standard-star grid, spectrogram resolution, comparison of originals-reproductions, spectrogram density levels, spectrogram widening and emulsion. A new atlas of slit spectrograms at 74 Å mm−1 is presented, giving good coverage especially for high-luminosity stars. MK classification from spectral intensity tracings is discussed. Advantages include easy distribution and sharing of standards, relaxation of resolution requirements and wide acceptable density range. Apparent shortcomings of the method seem easy to overcome. An atlas of spectral intensity tracings is presented. Some problems regarding objective-prism classification are discussed for higher as well as lower resolution. Quantitative classification methods are commented. Work in progress is presented on systems for two-dimensional classification of low-resolution objective-prism spectrograms of stars with spectral types earlier than G0.

Type
VII Theoretically and Empirically Oriented Approach to Spectral Classification
Information
International Astronomical Union Colloquium , Volume 47: Spectral Classification of the Future , 1979 , pp. 389 - 413
Copyright
Copyright © Vatican Observatory 1979

References

Abt, H. A. (1978). In IAU Colloquium No. 47. Spectral Classification of the Future. McCarthy, M. F., Philip, A. G. D. and Coyne, G. V., eds. Vatican Obs. p. 477.Google Scholar
Abt, H. A., Meinel, A. B., Morgan, W. W. and Tapscott, J. W. (1968). An Atlas of Lower-Dispersion Grating Stellar Spectra, Kitt Peak and Steward Observatories, USA.Google Scholar
Abt, H. A. and Smith, G. H. (1969). Publ. Astron. Soc. Pacific 81, 332.Google Scholar
Ardeberg, A., Brunet, J.-P., Maurice, E. and Prevot, L. (1972). Astron. Astrophys. Suppl. 6, 249.Google Scholar
Ardeberg, A. and Maurice, E. (1977a). Astron. Astrophys. 54, 233.Google Scholar
Ardeberg, A. and Maurice, E. (1977b). Astron. Astrophys. Suppl. 23, 153.Google Scholar
Barbier, D., Chalonge, D. and Vassy, E. (1935). J. Phys. 6, 137.Google Scholar
Baranne, A., Maurice, E. and Prevot, L. (1969). ESO Bull. 7, 11.Google Scholar
Bidelman, W. P. (1951). Astrophys. J. 113, 304.Google Scholar
Bidelman, W. P. (1954). Publ. Astron. Soc. Pacific 66, 249.Google Scholar
Chalonge, D. and Divan, L. (1952). Ann. Astrophys 15, 201 Google Scholar
Chalonge, D. and Divan, L. (1953). Compt. Rend. Acad T Sci. Paris 237, 298.Google Scholar
Chalonge, D. and Divan, L. (1973). Astron. Astrophys. 23, 69.Google Scholar
Fehrenbach, Ch, (1966). in IAU Symposium No, 24, Spectral Classification and Multicolor Photometry, Lodén, K., Lodén, L. O. and Sinnerstad, U., eds. Academic Press, London and New York, p. 67.Google Scholar
Fehrenbach, Ch. (1968). ESQ Bull. 3, 31.Google Scholar
Fehrenbach, Ch. and Burnage, R. (1978). Compt. Rend. Acad. Sci. Paris 286, 289.Google Scholar
Garrison, R. F. (1978). IAU Colloquium No. 47, Spectral Classification of the Future, McCarthy, M. F., Philip, A. G. D. and Coyne, G. V., eds. Vatican Obs. p. 27.Google Scholar
Garrison, R. F., Hiltner, W. A. and Schild, R. E. (1977). Astrophys. J. Suppl. 35, 111.Google Scholar
Hack, M. (1953). Ann. Astrophys. 16, 417.Google Scholar
Hiltner, W. A., Garrison, R. F. and Schild, R. E. (1969). Astrophys. J. 157, 313.Google Scholar
Houk, N. (1978). IAU Colloquium No. 47, Spectral Classification of the Future, McCarthy, M. F., Philip, A. G. D. and Coyne, G. V., eds. Vatican Obs. p. 51.Google Scholar
Houk, N., Irvine, N. J. and Rosenbush, D. (1974). An Atlas of Objective-Prism Spectra, the University of Michigan, Michigan, USA.Google Scholar
Houk, N. and Cowley, A. P. (1975). University of Michigan Catalogue of Two-Dimensional Spectral Types for the HD Stars, Volume 1, Department of Astronomy, University of Michigan, Ann Arbor, Michigan, USA.Google Scholar
Johnson, H. L. and Morgan, W. W. (1953). Astrophys. J. 117, 313.CrossRefGoogle Scholar
Keenan, P. C. and McNeil, R. (1976). An Atlas of Spectra of the Cooler Stars: Types G, K, M, S and C, The Ohio State University Press, Ohio, USA.Google Scholar
Kinman, T. D. and Mahaffey, C. T. (1978). IAU Colloquium No 47, Spectral Classification of the Future, McCarthy, M. F., Philip, A. G. D. and Coyne, G. V., eds. Vatican Obs. p. 539.Google Scholar
Landi, J., Jaschek, M. and Jaschek, C. (1977). An Atlas of Grating Stellar Spectra at Intermediate Dispersion, Observatorio Astronomico de Cordoba, Universidad Nacional de Cordoba, Cordoba, Argentina.Google Scholar
Lesh, J. R. (1968). Astrophys. J. Suppl. 17, 371 CrossRefGoogle Scholar
Lindblad, B. and Stenquist, E. (1934). Stockholm Obs. Ann. 11, No. 12.Google Scholar
Ljunggren, B. and Oja, T. (1961). Uppsala Astron. Obs. Ann. 4. No. 10.Google Scholar
Maurice, E. (1975). ESO Bull. 11. 33.Google Scholar
McCarthy, M. F., , S. J., Treanor, P. J., , S. J. and Bertiau, F. C., , S. J. (1966). IAU Symp. No. 24, Spectral Classification and Multicolor Photometry, Lodén, K., Lodén, L. O. and Sinnerstad, U., eds. Academie Press, London and New York, p. 59.Google Scholar
Morgan, W. W., Code, A. D. and Whitford, A. E. (1955). Astrophys. J. Suppl. 2, 41 Google Scholar
Morgan, W. W., and Keenan, P. C. (1973). in Annual Review of Astronomy and Astrophysics, vol. 11, Goldberg, L., Layzer, D. and Phillips, J. G., eds., Annual Reviews Inc., Palo Alto, California, USA, p. 29.Google Scholar
Morgan, W. W., Keenan, P. C. and Kellman, E. (1943). An Atlas of Stellar Spectra with an Outline of Spectral Classification, The University of Chicago Press, Chicago, Illinois, USA.Google Scholar
Reinsch, C. H. (1967), Numer. Math. 10, 177.CrossRefGoogle Scholar
Rydstrora, B. A. (1976). Uppsala Astron. Obs. Report 8, 1.Google Scholar
Rydstrom, B. A. (1978). Astron. Astrophys. Suppl. 327 25.Google Scholar
Samson, W. B. (1969). Publ. Roy. Obs. Edinburgh 6, No. 10.Google Scholar
Schmidt-Kaler, Th. (1978). in IAU Colloquium No. 47, Spectral Classification of the Future, McCarthy, M. F., Philip, A. G. D. and Coyne, G. V., eds. Vatican Obs. p. 285.Google Scholar
Schmidt-Kaler, Th., Diaz-Santanilia, G., Rudolph, R. and Unger, H. (1976). Forschungsberichte des Landes Nordrhein-Westfalen Nr. 2595.Google Scholar
Sinnerstad, U. (1961a). Stockholm Obs. Ann. 21, No. 6.Google Scholar
Sinnerstad, U. (1961b). Stockholm Obs. Ann. 22, No. 2.Google Scholar
Smith, F. (1968). M. N. R. A. S. 138, 109.Google Scholar
Vardya, N. (1978). in IAU Colloquium No. 47, Spectral Classification of the Future, McCarthy, M. F., Philip, A. G. D. and Coyne, G. V., eds. Vatican Obs., p. 227.Google Scholar
Walborn, N. R. (1972). Astron. J. 77, 312.CrossRefGoogle Scholar
Walborn, N. R. (1973). Astron. J. 78, 1067.Google Scholar
Walborn, N. R. (1978). in IAU Colloquium No. 47, Spectral Classification of the Future, McCarthy, M. F., Philip, A. G. D. and Coyne, G. V., eds., Vatican Obs., p. 337.Google Scholar
West, R. M. (1971). Bull. Abastumani Astrophys. Observ. 39, 29.Google Scholar
Yoss, K. M. (1973). in IAU Symposium No. 50, Spectral Classification and Multicolor Photometry, Fehrenbach, C. and Westerlund, B. E., eds., D. Reidel Publishing Company, Dordrecht-Holland/Boston, USA, p. 70.Google Scholar