Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aj....120.3255f&link_type=abstract
The Astronomical Journal, Volume 120, Issue 6, pp. 3255-3264.
Astronomy and Astrophysics
Astronomy
36
Stars: Binaries: Symbiotic, Infrared: Stars, Stars: Individual: Constellation Name: Z Andromedae, Stars: Individual (Ag Draconis, V443 Herculis), Stars: Individual (Ax Persei, Fg Serpentis), Stars: Late-Type
Scientific paper
Infrared radial velocities have been used to determine orbital elements for the cool giants of five well-known symbiotic systems, Z And, AG Dra, V443 Her, AX Per, and FG Ser, all of which have orbital periods near the two-year mean period for S-type symbiotics. The new orbits are in general agreement with previous orbits derived from optical velocities. From the combined optical and infrared velocities, improved orbital elements for the five systems have been determined. Each of the orbital periods has been determined solely from the radial-velocity data. The orbits are circular and have quite small mass functions of 0.001-0.03 Msolar. The infrared velocities of AG Dra do not show the large orbital velocity residuals found for its optical radial velocities.
Fekel Francis C.
Hinkle Kenneth H.
Joyce Richard R.
Skrutskie Michael F.
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