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Title: THE DISTRIBUTION OF DEUTERATED FORMALDEHYDE WITHIN ORION-KL

Abstract

We report the first high angular resolution imaging (3.″4 × 3.″0) of deuterated formaldehyde (HDCO) toward Orion-KL, carried out with the Submillimeter Array. We find that the spatial distribution of the formaldehyde emission systematically differs from that of methanol: while methanol is found toward the inner part of the region, HDCO is found in colder gas that wraps around the methanol emission on four sides. The HDCO/H{sub 2}CO ratios are determined to be 0.003–0.009 within the region, up to an order of magnitude higher than the D/H measured for methanol. These findings strengthen the previously suggested hypothesis that there are differences in the chemical pathways leading to HDCO (via deuterated gas-phase chemistry) and deuterated methanol (through conversion of formaldehyde into methanol on the surface of icy grain mantles)

Authors:
; ;  [1];  [2];  [3]
  1. Department of Astronomy, University of Michigan, 500 Church Street, Ann Arbor, MI 48109 (United States)
  2. California Institute of Technology, Division of Geological and Planetary Sciences, MS 150-21, Pasadena, CA 91125 (United States)
  3. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)
Publication Date:
OSTI Identifier:
22525666
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 808; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CONVERSION; COSMIC GASES; DEUTERIUM COMPOUNDS; EMISSION; FORMALDEHYDE; METHANOL; MOLECULES; RESOLUTION; SPATIAL DISTRIBUTION; STARS; SURFACES

Citation Formats

Favre, Cécile, Bergin, Edwin A., Neill, Justin L., Crockett, Nathan R., Zhang, Qizhou, and Lis, Dariusz C., E-mail: cfavre@umich.edu. THE DISTRIBUTION OF DEUTERATED FORMALDEHYDE WITHIN ORION-KL. United States: N. p., 2015. Web. doi:10.1088/0004-637X/808/2/155.
Favre, Cécile, Bergin, Edwin A., Neill, Justin L., Crockett, Nathan R., Zhang, Qizhou, & Lis, Dariusz C., E-mail: cfavre@umich.edu. THE DISTRIBUTION OF DEUTERATED FORMALDEHYDE WITHIN ORION-KL. United States. https://doi.org/10.1088/0004-637X/808/2/155
Favre, Cécile, Bergin, Edwin A., Neill, Justin L., Crockett, Nathan R., Zhang, Qizhou, and Lis, Dariusz C., E-mail: cfavre@umich.edu. 2015. "THE DISTRIBUTION OF DEUTERATED FORMALDEHYDE WITHIN ORION-KL". United States. https://doi.org/10.1088/0004-637X/808/2/155.
@article{osti_22525666,
title = {THE DISTRIBUTION OF DEUTERATED FORMALDEHYDE WITHIN ORION-KL},
author = {Favre, Cécile and Bergin, Edwin A. and Neill, Justin L. and Crockett, Nathan R. and Zhang, Qizhou and Lis, Dariusz C., E-mail: cfavre@umich.edu},
abstractNote = {We report the first high angular resolution imaging (3.″4 × 3.″0) of deuterated formaldehyde (HDCO) toward Orion-KL, carried out with the Submillimeter Array. We find that the spatial distribution of the formaldehyde emission systematically differs from that of methanol: while methanol is found toward the inner part of the region, HDCO is found in colder gas that wraps around the methanol emission on four sides. The HDCO/H{sub 2}CO ratios are determined to be 0.003–0.009 within the region, up to an order of magnitude higher than the D/H measured for methanol. These findings strengthen the previously suggested hypothesis that there are differences in the chemical pathways leading to HDCO (via deuterated gas-phase chemistry) and deuterated methanol (through conversion of formaldehyde into methanol on the surface of icy grain mantles)},
doi = {10.1088/0004-637X/808/2/155},
url = {https://www.osti.gov/biblio/22525666}, journal = {Astrophysical Journal},
issn = {0004-637X},
number = 2,
volume = 808,
place = {United States},
year = {Sat Aug 01 00:00:00 EDT 2015},
month = {Sat Aug 01 00:00:00 EDT 2015}
}