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Paper: RTT150 Planet Search Program at TUG: Results from Seven Years of Observation
Volume: 496, Living Together: Planets, Host Stars and Binaries
Page: 378
Authors: Yilmaz, M.; Selam, S. O.; Izumiura, H.; Bikmaev, I.; Sato, B.; Keskin, V.; Kambe, E.
Abstract: We have carried out a precise Doppler survey of evolved intermediate-mass stars at the TÜBİTAK National Observatory (TUG) since 2007 in order to detect planetary systems around these stars. For the past seven years we have been monitoring the radial velocity (RV) of 50 G–K type giants with a Doppler precision of 10 m s-1, using the Coude Echelle Spectrograph (CES) equipped with an iodine absorption cell. We have found that 9 stars show significant RV variations between 1 and 8 km s-1, while 13 targets have RV variation of 20–500 m s-1. The rest of the targets have a RV scatter of 10 m s-1. We have also found that several candidates show significant periodic RV variations that may imply the presence of stellar or substellar companions.
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