Discovery of the secondary star of the HgMn binary kappa Cancri

Details Discovery of the secondary star of the HgMn binary kappa Cancri Discovery of the secondary star of the HgMn binary kappa Cancri

1998-05-12

arxiv.org/abs/astro-ph/9805143v1

Astronomy and Astrophysics

Astrophysics

3 pages, 1 figure, to appear in: Proc. of the 26th workshop of the European Working Group on CP stars, eds. P. North, A. Schne

Scientific paper

A careful investigation of a CCD spectrum of the SB1 system kappa Cnc in the spectral region 3800 A - 8000 A resulted in the discovery of the lines of the secondary star. We then analyzed several short-wavelength range Reticon spectra obtained at different orbital phases to find additional radial velocities. The mass ratio is m_A/m_B = 2.2 +- 0.1 and, from binary spectrum-synthesis, the ratio of radii is R_A/R_B >= 2.

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