2016ApJ...830L..37I

We report the first evidence of a hot corino in a Bok globule. This is based on ALMA observations in the 1.2 mm band toward the low-mass Class 0 protostar IRAS 19347+0727 in B335. Saturated complex organic molecules (COMs), CH₃CHO, HCOOCH₃, and NH₂CHO, are detected in a compact region within a few 10 au around the protostar. Additionally, CH₃OCH₃, C₂H₅OH, C₂H₅CN, and CH₃COCH₃ are tentatively detected. Carbon-chain related molecules, CCH and c-C₃H₂, are also found in this source, whose distributions are extended over a scale of a few 100 au. On the other hand, sulfur-bearing molecules CS, SO, and SO₂ have both compact and extended components. Fractional abundances of the COMs relative to H₂ are found to be comparable to those in known hot corino sources. Though the COMs lines are as broad as 5-8 km s^–1, they do not show obvious rotation motion in the present observation. Thus, the COMs mainly exist in a structure whose distribution is much smaller than the synthesized beam (0.''58 x 0.''52).