BONNEFOY , Mickaël

We propose a new method to attenuate the nuisance of the flux halo of stars in hyperspectral images and recover the spatio-spectral sparse signals of forming extrasolar planets. The proposed approach takes into account the punctuality of the sources and the spatio-spectral point spread function of the instrument. We show that our linear and...

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Context. Emission lines that are indicative of active accretion have been observed for a number of low-mass companions (M < 30 MJup) to stars. Line variability is ubiquitous on stellar accretors, but it has never been characterized in detail for low-mass companions. Such characterizations can offer insights into the accretion mechanism at...

Recent observations by the B-star Exoplanet Abundance Study (BEAST) illustrate the existence of substellar companions around very massive stars. Here, we present the detection of two lower mass companions to a relatively nearby (148.7 −1.3 +1.5 pc), young (17 −4 +3 Myr), bright ( V = 6.632 ± 0.006 mag), 2.58 ± 0.06 M ⊙ B9V star HIP 81208...

International audience