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The Astronomical Journal Volume 119 Number 3 Create an alert RSS this journal

Francis C. Fekel et al. 2000 The Astronomical Journal 119 1375 doi:10.1086/301260

Infrared Spectroscopy of Symbiotic Stars. I. Orbits for Well-Known S-Type Systems

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Francis C. Fekel1,4, Richard R. Joyce2, Kenneth H. Hinkle2 and Michael F. Skrutskie3

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Abstract References Cited By

First results are reported for a program of monitoring symbiotic-star velocities in the 1.6 μm region with infrared-array technology. Infrared radial velocities have been used to determine single-lined spectroscopic orbits for six well-known symbiotic stars, EG And, T CrB, CI Cyg, BX Mon, RS Oph, and AG Peg. 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 six systems have been determined. Each of the orbital periods has been determined solely from the radial-velocity data. With the addition of our new velocities, the orbital period of BX Mon has been revised to 1259 days, a 10% decrease from the previously reported result.


Keywords

binaries: symbiotic; stars: individual (AG Pegasi, BX Monocerotis, CI Cygni, EG Andromedae, RS Ophiuchi, T Coronae Borealis); stars: late-type


Dates

Issue 3 (2000 March)

Received 1999 September 13, accepted for publication 1999 November 18



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