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Title:
On the alpha Orionis triple system
Authors:
Karovska, M.; Nisenson, P.; Noyes, R.
Affiliation:
AA(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA), AB(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA), AC(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 308, Sept. 1, 1986, p. 260-269. (ApJ Homepage)
Publication Date:
09/1986
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Companion Stars, Image Reconstruction, Red Giant Stars, Supergiant Stars, Interferometry, Periodic Variations, Polarization (Waves), Speckle Patterns, Stellar Envelopes, Stellar Magnitude, Stellar Orbits
DOI:
10.1086/164497
Bibliographic Code:
1986ApJ...308..260K

Abstract

Detection of two close optical companions to the red supergiant alpha Ori was accomplished in 1983 November on the Steward Observatory 2.25 m telescope. A new two-dimensional photon counting camera was used for data recording, and speckle imaging was used for image reconstruction. The closer of the two sources is located at 0arcsec.06±0arcsec.01 from alpha Ori (P.A. = 273°), the more distant at 0arcsec.51±0arcsec.01 (P.A. = 278°). An analysis of these results and of earlier polarization data favors an interpretation in which the two optical sources are stellar companions to alpha Ori.

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