IRTF Data Archive Program Information

# # Program information file # PROGRAM_ID 2022B987 PROGRAM_TITLE Candidate Brown Dwarfs Barnard5 PROGRAM_INV1 Michael Liu PROGRAM_INV2 PROGRAM_INV3 PROGRAM_INV4 PROGRAM_INV5 PROGRAM_SCICAT stellar PROGRAM_ABSTRACT_BEG We propose IRTF SpeX confirmation spectroscopy of 2 substellar candidates identified in our earlier imaging studies as water-bearing objects in the globule Barnard 5 (3.8h,+33d). Barnard 5 (LDN-1471) is considered a part of, yet detached from, the Perseus cloud complex. As an isolated globule with cold (Beichman+88) and grown dust grains (Bhatt56), at a distance of 350 pc and spanning some 45' in the sky, B5 is known to have ongoing star formation, with a group of protostars (Kirk+2006), fragmenting cloud filaments (Pineda+2015), and Herbig-Haro objects (Walawender+05). However, its low-mass membership is much unexploited. Our selection of candidates on the basis of the CFHT W-band imaging, and cold atmosphere indicators (W1-W2 and Z-J), has been proven reliable (Allers+20, Jose+20, Dubber+21) against reddened field contaminants. Using the SpeX in the past, we discovered the first brown dwarf in B5. PROGRAM_ABSTRACT_END