DISCOVERY OF A HOT CORINO IN THE BOK GLOBULE B335

作者：Imai Muneaki^*; Sakai Nami; Oya Yoko; Lopez Sepulcre Ana; Watanabe Yoshimasa; Ceccarelli Cecilia; Lefloch Bertrand; Caux Emmanuel; Vastel Charlotte; Kahane Claudine; Sakai Takeshi; Hirota Tomoya; Aikawa Yuri; Yamamoto Satoshi

来源：Astrophysical Journal Letters, 2016, 830(2): L37.

DOI：10.3847/2041-8205/830/2/L37

• ISM: abundances
• ISM: individual objects (B335)
• ISM: molecules
• stars: formation

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).

• 出版日期2016-10-20
• 单位中国科学院国家天文台