Non-Detection of the Putative Substellar Companion to HD 149382

Understand

It has been argued that a substellar companion may significantly influence the evolution of the progenitors of sdB stars.

• Recently, the bright sdB star HD 149382 has been claimed to host a substellar (possibly planetary) companion with a period of 2.391 days.
• This has important implications for the evolution of the progenitors of sdB stars as well as the source of the UV-excess seen in elliptical galaxies.
• In order to verify this putative planet, we made 10 radial velocity measurements of HD 149382 over 17 days with the High Resolution Spectrograph at the Hobby-Eberly Telescope.