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Orbital eccentricity of the symbiotic star MWC 560

✍ Scribed by R.K. Zamanov; A. Gomboc; K.A. Stoyanov; I.K. Stateva

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
120 KB
Volume
331
Category
Article
ISSN
0004-6337

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✦ Synopsis

Abstract

We present projected rotational velocity measurements of the red giant in the symbiotic star MWC 560, using the high‐resolution spectroscopic observations with the FEROS spectrograph. We find that the projected rotational velocity of the red giant is v sin i = 8.2 Β± 1.5 km s^–1^, and estimate its rotational period tobe P~rot~ = 144–306 days. Using the theoretical predictions of tidal interaction and pseudosynchronization, we estimate the orbital eccentricity e = 0.68–0.82. We briefly discuss the connection of our results with the photometric variability of the object (Β© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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