- Title
- ALMA observations of the IRDC Clump G34.43+00.24 MM3: complex organic and deuterated molecules
- Creator
- Sakai, Takeshi; Yanagida, Takahiro; Furuya, Kenji; Aikawa, Yuri; Sanhueza, Patricio; Sakai, Nami; Hirota, Tomoya; Jackson, James M.; Yamamoto, Satoshi
- Relation
- Astrophysical Journal Vol. 857, Issue 1, no. 35
- Publisher Link
- http://dx.doi.org/10.3847/1538-4357/aaadfd
- Publisher
- Institute of Physics Publishing (IOP)
- Resource Type
- journal article
- Date
- 2018
- Description
- We have observed complex organic molecules (COMs) and deuterated species toward a hot core/corino (HC) associated with the infrared dark cloud clump G34.43+00.24 MM3 with the Atacama Large Millimeter/submillimeter Array. We have detected six normal-COMs (CH₃OH, CH₃CHO, CH₃CH₂CN, CH₃OCH₃, HCOOCH₃, and NH₂CHO), one deuterated-COM (CH₂DCN), and two deuterated fundamental molecules (D₂CO and DNC) toward G34.43+00.24 MM3 HC. None of these lines, except for CH₃OH, are detected toward the shocked regions in our data, which suggests that COMs do not originate in shocks. The abundance of the COMs relative to CH₃OH in G34.43+00.24 MM3 HC is found to be similar to those in high-mass hot cores, rather than those in hot corinos in low-mass star-forming regions. This result suggests that the physical conditions of the warm-up phase of G34.43+00.24 MM3 HC are similar to those of high-mass sources. On the other hand, the D₂CO abundance relative to CH₃OH in G34.43+00.24 MM3 HC is higher than that of other hot cores, and seems to be comparable to that of hot corinos. The relatively high D₂CO/CH₃OH ratio of G34.43+00.24 MM3 HC implies a long cold starless phase of G34.43+00.24 MM3 HC.
- Subject
- astrochemistry; ISM: clouds; ISM: molecules; stars: formation
- Identifier
- http://hdl.handle.net/1959.13/1401732
- Identifier
- uon:34953
- Identifier
- ISSN:0004-637X
- Rights
- © 2018. The American Astronomical Society. All rights reserved.
- Language
- eng
- Full Text
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