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Abstract: We present projected rotational velocity measurements of the red giant in thesymbiotic star MWC 560 V694 Mon, using the high-resolution spectroscopicobservations with the FEROS spectrograph. We find that the projected rotationalvelocity of the red giant is vsini = 8.2 +- 1.5 km-s, and estimate itsrotational period to be P rot = 144-306 days. Using the theoretical predictionsof tidal interaction and pseudosynchronization, we estimate the orbitaleccentricity e=0.68-0.82. We briefly discuss the connection of our results withthe photometric variability of the object.



Author: R. K. Zamanov, A. Gomboc, K. A. Stoyanov, I. K. Stateva

Source: https://arxiv.org/



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