Composite spectra paper 2: HD 88021/2
- 13 Downloads
HD 88021/2 (ADS 7662) is a very close visual binary. The accepted visual orbit, which is of very high eccentricity and graded “reliable”, led to the expectation of a periastron passage in 1981, when there should have been a large difference in radial velocity between the components. No such event took place, and there is little indication that it is likely to occur in the near future. A new interpretation of the visual orbital data leads to an orbit of a different character from those hitherto proposed. A decision between the competing orbits should be possible within a very few years. Meanwhile, the method of spectral subtraction developed in Paper 1 has enabled us to separate the spectra of the two components and to show that their spectral types are K0 III and A2m.
Key wordscomposite spectra visual binaries stars, individual
Unable to display preview. Download preview PDF.
- Aitken, R. G. 1932,New General Catalogue of Double Stars Within 120‡ of the North Pole, Carnegie Institution of Washington, Washington, D.C.Google Scholar
- Dommanget, J., Nys, O.1982,Second Catalogue d’ éphémérides des vitesses radiales relatives des composantes des étoiles doubles visuelles dont l’ orbite est connue, Observatoire Royal de Belgique, Brussels.Google Scholar
- Finsen, W. S. 1977, IAU Comm. 26Circ. d’Inf., no. 71.Google Scholar
- Hynek, J. A. 1938,Contr. Perkins Obs.,1, 185.Google Scholar
- Kepler, J. 1609,Astronomia Nova, Vogelin, Heidelberg.Google Scholar
- Markowitz, A. H. 1969,A Study of Stars Exhibiting Composite Spectra, Ohio State Univ., Columbus.Google Scholar
- Van Dessel, E. 1979,Obs. R. de Belg. Commun., Ser. B, No. 109.Google Scholar
- Worley, C. E., Heintz, W. D. 1983,Publ. U.S. Naval Obs.,24, Part 7.Google Scholar