DISCOVERY of A HOT CORINO in the BOK GLOBULE B335

Muneaki Imai, Nami Sakai, Yoko Oya, Ana López-Sepulcre, Yoshimasa Watanabe, Cecilia Ceccarelli, Bertrand Lefloch, Emmanuel Caux, Charlotte Vastel, Claudine Kahane, Takeshi Sakai, Tomoya Hirota, Yuri Aikawa, Satoshi Yamamoto

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31 Citations (Scopus)

Abstract

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).

Original languageEnglish
Article numberL37
JournalAstrophysical Journal Letters
Volume830
Issue number2
DOIs
Publication statusPublished - 2016 Oct 20
Externally publishedYes

Keywords

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

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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  • Cite this

    Imai, M., Sakai, N., Oya, Y., López-Sepulcre, A., Watanabe, Y., Ceccarelli, C., Lefloch, B., Caux, E., Vastel, C., Kahane, C., Sakai, T., Hirota, T., Aikawa, Y., & Yamamoto, S. (2016). DISCOVERY of A HOT CORINO in the BOK GLOBULE B335. Astrophysical Journal Letters, 830(2), [L37]. https://doi.org/10.3847/2041-8205/830/2/L37