Tomographic Separation of Composite Spectra. VIII. The Physical Properties of the Massive Compact Binary in the Triple Star System HD 36486 (δ Orionis A)

@article{Harvin2001TomographicSO,
  title={Tomographic Separation of Composite Spectra. VIII. The Physical Properties of the Massive Compact Binary in the Triple Star System HD 36486 ($\delta$ Orionis A)},
  author={James A. Harvin and Douglas R. Gies and William G. Bagnuolo, Jr. and Laura R. Penny and Michelle L. Thaller},
  journal={The Astrophysical Journal},
  year={2001},
  volume={565},
  pages={1216 - 1230}
}
We present the first double-lined spectroscopic orbital elements for the central binary in the massive triple δ Orionis A. The solutions are based on fits of cross-correlation functions of IUE high-dispersion UV spectra and He I λ6678 profiles. The orbital elements for the primary agree well with previous results, and in particular, we confirm the apsidal advance with a period of 224.5 ± 4.5 yr. We also present tomographic reconstructions of the primary and secondary stars' spectra that confirm… 

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