Hot Corino Chemistry in the Class I Binary Source Ser-emb 11
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We report the detection of more than 120 emission lines corresponding to eight complex organic molecules (COMs; CH3OH, CH3CH2OH, CH3OCH3, CH3OCHO, CH3COCH3, NH2CHO, CH2DCN, and CH3CH2CN) and three isotopologues (CH2DOH, (CH3CN)-C-13, and (CH3CN)-N-15) toward the western component of the Ser-emb 11 binary young stellar object using observations with the Atacama Large Millimeter/submillimeter Array at similar to 1 mm. The complex organic emission was unresolved with a similar to 0.'' 5 beam (similar to 220 au) in a compact region around the central protostar, and a population diagram analysis revealed excitation temperatures above 100 K for all COMs, indicating the presence of a hot corino. The estimated column densities were in the range of 10(17)-10(18) cm(-2) for the O-bearing COMs, and three orders of magnitude lower for the N-bearing species. We also report the detection of H2CO and CH3OH emission in a nearby millimeter source that had not been previously cataloged. Ser-emb 11 is classified in the literature as a Class I source near the Class 0/I cutoff. The estimated COM relative abundances in Ser-emb 11 W and the other three Class I hot corino sources reported in the literature are consistent with those of Class 0 hot corinos, suggesting a continuity in the chemical composition of hot corinos during protostellar evolution.
Original language | English |
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Article number | 155 |
Journal | Astrophysical Journal |
Volume | 923 |
Issue number | 2 |
Number of pages | 24 |
ISSN | 0004-637X |
DOIs | |
Publication status | Published - 2021 |
- COMPLEX ORGANIC-MOLECULES, LOW-MASS PROTOSTARS, ALMA, SUBMILLIMETER, MILLIMETER, SERPENS, POPULATION, ABUNDANCES, EVOLUTION, NITROGEN
Research areas
Links
- https://arxiv.org/pdf/2109.11512.pdf
Submitted manuscript
ID: 288264227