The Spectroscopic Binary Pictoris
Open Access
- 1 February 1966
- journal article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 131 (3) , 435-441
- https://doi.org/10.1093/mnras/131.3.435
Abstract
The first spectroscopic orbit of the early-type binary δ Pic (revised type B 0.5(?III)) has been derived. The period of 1.67254 days fits observations at Radcliffe (1963–4), Cordoba (1949–50) and Lick Southern Expedition (1914). A secondary spectrum is detected for the first time and a mass ratio of 1.89 ± 0.06 is derived; the system is a massive one with m1 sin 3i = 12.7 ⊙, m2 sin 3i = 6.7 ⊙. Cousins' discovery that the star is an eclipsing binary with two minima will eventually allow individual masses to be calculated.Keywords
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