Abstract
π Aquilae is a visual double star whose angular separation of 1 ”.4 is so small that the system has been regarded as a composite-spectrum binary. However, by taking advantage of the excellence of the site and optics of the Mount Wilson 100-inch telescope, we have been able to obtain spectra of each component separately; the spectral types are about G8 III and A2V
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References
Abt, H. A. 1973,Astrophys. J. Suppl.,26, 365.
Adams, W. S., Joy, A. H., Sanford, R. F., Stromberg, G. 1929,Astrophys. J.,70, 208.
Aitken, R. G. 1932,New General Catalogue of Double Stars within 120‡ of the North Pole, Carnegie Institution of Washington, Washington, D.C., p. 1136.
Astronomical Almanac 1989, H. M. Stationery Office, London, p. H17.
Baranne, A., Mayor, M., Poncet, J. L. 1979,Vistas Astr.,23, 279.
Bertaud, C., Floquet, M. 1967,J. Obs.,50, 425.
Burnham, S. W. 1906,A General Catalogue of Double Stars within 121‡ of the North Pole, Carnegie Institution of Washington, Washington, D.C., p. 861.
Cannon, A. J., Pickering, E. C. 1923,Ann. Harv. Coll. Obs.,98, 113 & 252.
Griffin, R. F. 1967,Astrophys. J.,148, 465.
Griffin, R. F. 1968,A Photometric Atlas of the Spectrum of Arcturus, Cambridge Philosophical Society, Cambridge.
Griffin, R. & R. 1986,J. Astrophys. Astr.,7, 195 (Paper 1).
Griffin, R. F., Redman, R. O. 1960,Mon. Not. R. astr. Soc.,120, 287.
Herschel, Sir W. 1785,Phil. Trans.,75, 40.
Herschel, J. F. W., South, J. 1825,Observations and the Apparent Distances and Positions of 380 Double and Triple Stars... Nicol, London, p. 340.
Hoffleit, D. N. 1982,Bright Star Catalogue, Yale Univ. Obs., New Haven.
Hynek, J. A. 1938,Contr. Perkins Obs.,1, 185.
Keenan, P. C. 1983,Bull. Inf. Centre Donnees Stellaires, no. 24, 19.
Keenan, P. C., Wilson, O.C. 1977,Astrophys. J.,214, 399.
Keenan, P. C, Yorka, S. B. 1985,Bull. Inf. Centre Données Stellaires, no. 29, 25.
Keenan, P. C., Yorka, S. B. 1988,Bull Inf. Centre Données Stellaires, no. 35, 37.
Morgan, W. W., Keenan, P. C., Kellman, E. 1943,An Atlas of Stellar Spectra with an Outline of Spectral Classification, Univ. of Chicago Press, Chicago.
Muller, P. 1949,Bull. Astr.,14, 177.
Petrie, R. M. 1942,Publ. astr. Soc. Pacific,54, 195.
Rufener, F. 1980,Catalogue of Stars measured in the Geneva Observatory Photometrie System (third edition), Observatoire de Genève, Geneva, p. 247.
St. John, C. E., Moore, C. E., Ware, L. M., Adams, E. F., Babcock, H. D. 1928,Revision of Rowland’s Preliminary Table of Solar Spectrum Wavelengths, Carnegie Institution of Washington, Washington, D.C.
Stephenson, C. B., Sanwal, N. B. 1969,Astr. J.,74, 689.
Struve, F. G. W. 1827,Catalogus Novus Stellarum Duplicium et Multiplicium, Typographi Academici, Dorpat, pp. xxv & 65.
Struve, F. G. W. 1837,Mensurae Micrometricae, Typographia Academica, Petropolis, p. 25.
van Herk, G. 1966,J. Obs.,49, 355.
Wilson, O. C. 1976,Astrophys. J.,205, 823.
Wilson, O. C., Bappu, M. K. V. 1957,Astrophys. J.,125, 661.
Wilson, R. E. 1953,General Catalogue of Stellar Radial Velocities, Carnegie Institution of Washington, Washington, D.C.
Worley, C. E. 1969,Astr. J.,74, 764.
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Griffin, R.&.R. Composite spectra. J Astrophys Astron 10, 433–438 (1989). https://doi.org/10.1007/BF02715077
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DOI: https://doi.org/10.1007/BF02715077