HERMES High-Resolution Spectroscopy of HD 149382–Where Did the Planet Go?

A close substellar companion has been claimed to orbit the bright sdB star HD 149382 with a period of 2.391 d. In order to check this important discovery we gathered 26 high resolution spectra over 55 days with the HERMES spectrograph on the 1.2 m Mercator telescope on La Palma, and analyzed the resulting radial velocities. Our data show no sign of any significant radial-velocity periodicities, and from the high precision of our measurements we rule out any RV variations with amplitudes higher than 0.79 km/s on periods shorter than 50 days. © 2011 American Institute of Physics.

ISBN:978-0-7354-0886-9

Publication year:2011

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IOF-keylabel:yes

Authors from:Higher Education