Revised orbits for 105 Herculis and Pi Cephei A and a model for the Pi Cephei system

Details Revised orbits for 105 Herculis and Pi Cephei A and a model for the Pi Cephei system Revised orbits for 105 Herculis and Pi Cephei A and a model for the Pi Cephei system

Apr 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.203..103s&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 203, Apr. 1983, p. 103-116. Research supported by the National Research

Astronomy and Astrophysics

Astrophysics

6

Binary Stars, Cepheid Variables, Orbital Elements, Stellar Motions, Radial Velocity, Stellar Color, Stellar Luminosity, Stellar Mass

Scientific paper

New orbital elements for the giant primary components of 105 Herculis and Pi Cephei A are derived using radial velocities from Dominion Astrophysical Observatory coude plates. These data are combined with those of Harper (1925) in order to estimate the velocity amplitude of Pi Cephei A in the visual orbit of this triple system. Two models of this system are developed. In the first model, the unseen spectroscopic secondary component is a single main-sequence star, although this seems unlikely, while in the alternative model the unseen secondary component is itself double.

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