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

Jacobs, Valery Ann; Ostensen, Roy; Van Winckel, Hans; Bloemen, Steven; Pápics, Péter; Raskin, Gert; Debosscher, Jonas; Uttenthaler, Stefan; van Aarle, Els; Waelkens, Christoffel; Bauwens, Eva; Verhoelst, Tijl; Gielen, Clio; Lehmann, Holger; Oreiro Rey, Raquel

doi:10.1063/1.3570991

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

Author:

Jacobs, Valery Ann

Ostensen, Roy ; Van Winckel, Hans ; Bloemen, Steven ; Pápics, Péter ; Raskin, Gert ; Debosscher, Jonas ; Uttenthaler, Stefan ; van Aarle, Els ; Waelkens, Christoffel ; Bauwens, Eva ; Verhoelst, Tijl ; Gielen, Clio ; Lehmann, Holger ; Oreiro Rey, Raquel

Abstract:

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.