IRTF Data Archive Program Information

# # Program information file # PROGRAM_ID 2023B035 PROGRAM_TITLE Spectroscopic confirmation of brown dwarf companions PROGRAM_INV1 Bhavana Lalchand PROGRAM_INV2 Wen-Ping Chen PROGRAM_INV3 PROGRAM_INV4 PROGRAM_INV5 PROGRAM_SCICAT stellar PROGRAM_ABSTRACT_BEG We propose low-resolution SpeX spectroscopic confirmation of brown dwarf pairs. Each target is the faint companion with consistent Gaia parallax and proper motion with the primary known to have LAMOST spectra later than M6. This means each pair consists of at least one ultracool dwarf and likely of two brown dwarfs once spectroscopically verified, adding to the rare substellar binary inventory for dynamical mass determinations or test beds for cool atmosphere models. For this season there are 14 bright targets [K mag 9 to 14], each ranging 2' to 12' from the primary. PROGRAM_ABSTRACT_END