Fekel, Francis C; Hinkle, Kenneth H; Joyce, Richard R; Wood, Peter R
With new infrared radial velocities we have computed orbits of the M giants in three southern S-type symbiotic systems. AE Ara and SS 73-147 have circular orbits with periods of 803 and 820days, respectively. The eccentric orbit of Y CrA has a period that is about twice as long, 1619days. Except for CH Cyg it is currently the S-type symbiotic system with the longest period for which a spectroscopic orbit has been determined. The Paschen δ emission line velocities of AE Ara are nearly in...[Show more]
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