Pierre Brassard

TL;DR: In this article, the status of white dwarfs as cosmochronometers is reviewed and the role of these objects in the evolution of stars is discussed, as well as their ability to constrain the ages of various populations of evolved stars in the Galaxy.

TL;DR: In this article, it was shown that pulsation modes are driven through an opacity bump due to a local enhancement of the iron abundance in the envelopes of sdB stars, which provides a natural explanation for the instabilities found in the newly discovered class of pulsating sdB star.

TL;DR: In this article, the authors discovered a new class of low-amplitude, multimode sdB pulsators with periods of the order of an hour, implying that they are due to gravity modes rather than pressure modes.

TL;DR: In this article, a survey of the pulsation properties of hot B subdwarfs is presented, where all pulsation modes with l = 0, 1, 2, and 3 in the 80-1500 s period window are considered.

TL;DR: The presence of two nearly Earth-sized bodies orbiting the post-red-giant, hot B subdwarf star KIC 05807616 is reported, which may be the dense cores of evaporated giant planets that were transported closer to the star during the engulfment and triggered the mass loss necessary for the formation of the hot B subswarf.