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| Paper: |
Seasonal Variations of Radial Velocity of RY Sagittarii, a Star with the R Coronae Borealis Type Variability |
| Volume: |
391, Hydrogen-Deficient Stars |
| Page: |
47 |
| Authors: |
Rosenbush, A.E.; Gorynya, N.A. |
| Abstract: |
Our monitoring of RYSgr in 2005−2007 confirmed that the average radial velocity varies from year to year as has already been noted for 1970 and 1988. Averaged radial velocities were −27, −15 and −20 km s−1 in 2005, 2006 and 2007, respectively. We did not find a smooth transition from one value to the other during our season of observations that is 5 months. Radial velocity pulsates with two periods: 37.6 and 49 days. The amplitude of velocity pulsation has decreased from 32 km s−1 in 2005 to 21 km s−1 in 2007. |
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