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Spectroscopic Studies of Multiple Stars and Speckle Binaries: How to observe ad infinitum

Published online by Cambridge University Press:  12 April 2016

Francis C. Fekel
Francis C. Fekel*
Affiliation:
NASA Marshall Space Flight Center, Huntsville, AL 35812, USA

Abstract

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Over the past 16 years at the McDonald Observatory and the Kitt Peak National Observatory, I have obtained high-dispersion spectroscopic observations of roughly 3 dozen multiple systems and 7 speckle or astrometric binaries. The current status of this obviously long-term project is discussed. Although some systems have periods of about 50 to 85 years, most have periods in the range of 1 to 20 years. Thus, many now have been observed for at least one cycle and preliminary spectroscopic orbital elements have been determined. For a number of the systems fundamental data such as the distance to the system, as well as the individual spectral types, absolute magnitudes, and masses can be obtained if accurate visual/speckle orbital elements also are known. These elements and the derived fundamental parameters may be used as constraints on multiple-star formation theory.

Type
Spectroscopic Studies
Information
International Astronomical Union Colloquium , Volume 135: Complementary Approaches to Double and Multiple Star Research , 1992 , pp. 89 - 97
Copyright
Copyright © Astronomical Society of the Pacific 1992

References

Abt, H.A., Sanwal, N.B., & Levy, S.G. 1980, ApJS, 43, 549 Google Scholar
Africano, J., Evans, D., Fekel, F., Smith, B., & Morgan, C. 1978, AJ, 83, 1100 CrossRefGoogle Scholar
Batten, A.H., Fletcher, J.M., & MacCarthy, D.G. 1989, PDAO, 17, 1 Google Scholar
Batten, A.H., Morbey, C.L., Fekel, F.C. & Tomkin, J. 1979, PASP, 91, 304 CrossRefGoogle Scholar
Cole, W., Fekel, F., Hartkopf, W., McAlister, H., & Tomkin, J. 1992, AJ, 103, 1357 Google Scholar
Duquennoy, A. & Mayor, M. 1991, A&A, 248, 485 Google Scholar
Eitter, J.J. & Beavers, W.I. 1977, ApJS, 34, 493 Google Scholar
Evans, D.S. & Fekel, F.C. 1979, ApJ, 228, 497 CrossRefGoogle Scholar
Fekel, F.C. 1975, AJ, 80, 844 CrossRefGoogle Scholar
Fekel, F.C. 1980, PASP, 92, 785 Google Scholar
Fekel, F.C. 1981a, ApJ, 246, 879 CrossRefGoogle Scholar
Fekel, F.C. 1981b, ApJ, 248, 670 Google Scholar
Fekel, F.C. & Bopp, B.W. 1977, PASP, 89, 216 Google Scholar
Fekel, F.C. & Scarfe, C.D. 1986, AJ, 92, 1162 Google Scholar
Fekel, F.C. & Tomkin, J. 1982, ApJ, 263, 289 CrossRefGoogle Scholar
Fekel, F.C., Bopp, B.W., & Lacy, C. 1978, AJ, 83, 1445 Google Scholar
Gatewood, G. & Behall, A.L., 1975, AJ, 80, 1065 Google Scholar
Griffin, R.E.M., Schroder, K.-P., Misch, A., & Griffin, R.F. 1992, A&A, 254 289 Google Scholar
Hartkopf, W.I., McAlister, H.A., & Franz, O.G., 1989, AJ, 98, 1014 CrossRefGoogle Scholar
Hartkopf, W.I., McAlister, H.A., Yang, X., & Fekel, F.C. 1992, AJ 103, 1976 CrossRefGoogle Scholar
Heints, W.D. 1986, A&AS, 65, 411 Google Scholar
Heintz, W.D. 1989, PASP, 101 510 Google Scholar
Kamper, K.W. & Beardsley, W.R. 1987, AJ, 94, 1302 Google Scholar
Latham, D. & Stefanik, R. 1992, In Reports on Astronomy IAU Trans. XXIB, in pressGoogle Scholar
Pearce, J.A. 1957, Trans. IAU, 9, 441 Google Scholar
Scarfe, C.D., Barlow, D.J., McAlister, H.A., Hartkopf, W.I., Fekel, F.C., Rees, R., Lyons, R.W., & Bolton, C.T. 1992, Complementary Approaches to Double and Multiple Star Research Proc. IAU Colloquium 135, in pressGoogle Scholar
Strassmeier, K.G. & Fekel, F.C. 1990, A&A, 230, 389 Google Scholar
Tomkin, J., McAlister, H.A., Hartkopf, W.I., & Fekel, F.C. 1987, AJ, 93, 1236 Google Scholar
Van Biesbroeck, G. 1974, ApJS, 23, 413 CrossRefGoogle Scholar
Vogt, S.S., Tull, R.G., & Kelton, P. 1978, Appl. Optics, 17, 574 Google Scholar
Willmitch, T.R. 1989, Master’s thesis, Vanderbilt University Google Scholar
Willmitch, T.R. & Fekel, F.C. 1990, AJ, 99, 373 Google Scholar