GSC 06214-00210 b is a gas giant exoplanet orbiting the K-type star called GSC 06214-00210 which is located approximately 356 light-years from Earth in the constellation Scorpius.
GSC 06214-00210 b along with 1RXS J160929.1âÂÂ210524 b was first reported in 2010 as part of an adaptive optics imaging survey targeting wide companions (~50âÂÂ500 AU) to solar-type stars in the Upper Scorpius association. The discovery paper, published in 2011, identified it as a ~14 Jupiter-mass companion and confirmed its comoving status with the host star. Follow-up spectroscopy observations in the same year refined its properties and also the spectral type of L0ñ1, with multiple signs of youth.
Near-infrared spectroscopy revealed exceptionally strong Paschen ò emission (equivalent width âÂÂ11.4 ñ 0.3 à), indicating the presence of a circumplanetary accretion disk.
Subsequent studies have documented variability in the H I Paschen ò emission line on timescales from minutes to decades, with moderate flux changes (<50%) on short scales and larger variations (up to ~1000%) over years, resembling classical T Tauri stars. Line profiles for GSC 06214-00210 b and GQ Lupi b and for GSC 06214-00210 b, they are consistent with both magnetospheric accretion and shock models, though shock models are favored in the brightest epochs.