Skip to content

S20B0110abst

S20B0110

Brown-dwarf or massive Jupiter-like companions would be rare at wide orbits (5–100 au), as revealed by the previous large-scale direct imaging campaigns. This makes it significantly inefficient to find new substellar companions and limits the possibility to characterize brown dwarfs and planets. Our S20A-137 proposal suggested a new approach that utilizes the prior information for the presences of substellar companions to achieve efficient detection yields. That is based on the high-precision Hipparcos-GAIA (H-G) catalogue of proper motion accelerations, which occur if stars host co-moving companions including planets. To reveal companions identified in the H-G catalogue, we will further conduct SCExAO/CHARIS observations deep enough to image substellar companions even if they are giant planets. The new S20B observations will target nine sun-like stars in young nearby moving groups that are not observed in the S20A semester. Also, if a companion candidate is identified by the S20A-137 program, that will be followed up. This approach thus leads to efficiently supply new wide-orbit substellar companions well suited for follow-up characterizations, as well as useful constrains on statistical population of those.

This document was translated from LATEX by HEVEA.