TY - JOUR
T1 - DISCOVERY of A HOT CORINO in the BOK GLOBULE B335
AU - Imai, Muneaki
AU - Sakai, Nami
AU - Oya, Yoko
AU - López-Sepulcre, Ana
AU - Watanabe, Yoshimasa
AU - Ceccarelli, Cecilia
AU - Lefloch, Bertrand
AU - Caux, Emmanuel
AU - Vastel, Charlotte
AU - Kahane, Claudine
AU - Sakai, Takeshi
AU - Hirota, Tomoya
AU - Aikawa, Yuri
AU - Yamamoto, Satoshi
N1 - Funding Information:
The authors are grateful to the reviewer of this paper for invaluable comments. This paper makes use of the following ALMA data: ADS/JAO.ALMA#2013.1.01102.S. ALMA is a partnership of ESO (representing its member states), NSF (USA), and NINS (Japan), together with NRC (Canada), NSC and ASIAA (Taiwan), and KASI (Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO, and NAOJ. This study is financially supported by KAKENHI (21224002, 25400223, and 25108005). The authors acknowledge the financial support by JSPS and MAEE under the JapanFrance integrated action programme (SAKURA: 25765VC).
Publisher Copyright:
© 2016. The American Astronomical Society. All rights reserved..
PY - 2016/10/20
Y1 - 2016/10/20
N2 - 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 ×0.″52).
AB - 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 ×0.″52).
KW - ISM: abundances
KW - ISM: individual objects (B335)
KW - ISM: molecules
KW - stars: formation
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U2 - 10.3847/2041-8205/830/2/L37
DO - 10.3847/2041-8205/830/2/L37
M3 - Article
AN - SCOPUS:85053361481
SN - 2041-8205
VL - 830
JO - Astrophysical Journal Letters
JF - Astrophysical Journal Letters
IS - 2
M1 - L37
ER -