Journal
ASTROPHYSICAL JOURNAL LETTERS
Volume 830, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.3847/2041-8205/830/2/L37
Keywords
ISM: abundances; ISM: individual objects (B335); ISM: molecules; stars: formation
Categories
Funding
- KAKENHI [21224002, 25400223, 25108005]
- JSPS
- MAEE under the Japan-France integrated action programme [SAKURA: 25765VC]
- Grants-in-Aid for Scientific Research [15H03646, 25108005, 23103004] Funding Source: KAKEN
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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 H-2 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).
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