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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
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Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/29296
Title: First Abundance Measurement of Organic Molecules in the Atmosphere of HH 212 Protostellar Disk
Authors: Lee, Chin-Fei
CODELLA, CLAUDIO 
Li, Zhi-Yun
Liu, Sheng-Yuan
Issue Date: 2019
Journal: THE ASTROPHYSICAL JOURNAL 
Number: 876
Issue: 1
First Page: 63
Abstract: HH 212 is one of the well-studied protostellar systems, showing the first vertically resolved disk with a warm atmosphere around the central protostar. Here we report a detection of nine organic molecules (including newly detected ketene, formic acid, deuterated acetonitrile, methyl formate, and ethanol) in the disk atmosphere, confirming that the disk atmosphere is, for HH 212, the chemically rich component, identified before at a lower resolution as a “hot corino.” More importantly, we report the first systematic survey and abundance measurement of organic molecules in the disk atmosphere within ∼40 au of the central protostar. The relative abundances of these molecules are similar to those in the hot corinos around other protostars and in Comet Lovejoy. These molecules can be either (i) originally formed on icy grains and then desorbed into gas phase or (ii) quickly formed in the gas phase using simpler species ejected from the dust mantles. The abundances and spatial distributions of the molecules provide strong constraints on models of their formation and transport in star formation. These molecules are expected to form even more complex organic molecules needed for life and deeper observations are needed to find them.
URI: http://hdl.handle.net/20.500.12386/29296
URL: https://iopscience.iop.org/article/10.3847/1538-4357/ab15db/pdf
ISSN: 0004-637X
DOI: 10.3847/1538-4357/ab15db
Bibcode ADS: 2019ApJ...876...63L
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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