Speaker
Description
YSES 1 b is a directly imaged young substellar companion on a wide orbit of 160 AU, making it an interesting challenge for formation theories. Initial photometric observations with SPHERE and NACO from Y to M band suggested physical parameters of Teff=1700 K, R=3 R_J and M=14 M_J. Here, we present new observations in the r’, i’ and z’ band using the MagAO-X instrument and revisit the modelling of YSES 1 b based on the combined MagAO-X, SPHERE and NACO data. In addition, we update the forward model by including the effect of possible dust extinction from the circumplanetary disk (CPD) which was recently confirmed with JWST. The newly derived parameters result in a higher Teff of 2800 K and a more physically expected radius of 1.6 R_J. The mass increases to 26 or 42 M_J, depending on the age used for the system. This result suggests that YSES 1 b resides more in the brown dwarf realm rather than the planetary regime.
| Talk category | NOVA Network 2 |
|---|---|
| PhD relevance | 4th |
