Digging into the Interior of Hot Cores with the ALMA (DIHCA). III. The Chemical Link between NH2CHO, HNCO, and H2CO
We have analyzed the NH _2 CHO, HNCO, H _2 CO, and CH _3 CN ( ^13 CH _3 CN) molecular lines at an angular resolution of ∼0.″3 obtained by the Atacama Large Millimeter/submillimeter Array Band 6 toward 30 high-mass star-forming regions. The NH _2 CHO emission has been detected in 23 regions, while th...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/acca1d |
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| author | Kotomi Taniguchi Patricio Sanhueza Fernando A. Olguin Prasanta Gorai Ankan Das Fumitaka Nakamura Masao Saito Qizhou Zhang Xing Lu Shanghuo Li Huei-Ru Vivien Chen |
| author_facet | Kotomi Taniguchi Patricio Sanhueza Fernando A. Olguin Prasanta Gorai Ankan Das Fumitaka Nakamura Masao Saito Qizhou Zhang Xing Lu Shanghuo Li Huei-Ru Vivien Chen |
| author_sort | Kotomi Taniguchi |
| collection | DOAJ |
| description | We have analyzed the NH _2 CHO, HNCO, H _2 CO, and CH _3 CN ( ^13 CH _3 CN) molecular lines at an angular resolution of ∼0.″3 obtained by the Atacama Large Millimeter/submillimeter Array Band 6 toward 30 high-mass star-forming regions. The NH _2 CHO emission has been detected in 23 regions, while the other species have been detected toward 29 regions. A total of 44 hot molecular cores (HMCs) have been identified using the moment 0 maps of the CH _3 CN line. The fractional abundances of the four species have been derived at each HMC. In order to investigate pure chemical relationships, we have conducted a partial correlation test to exclude the effect of temperature. Strong positive correlations between NH _2 CHO and HNCO ( ρ = 0.89) and between NH _2 CHO and H _2 CO (0.84) have been found. These strong correlations indicate their direct chemical links; dual-cyclic hydrogen addition and abstraction reactions between HNCO and NH _2 CHO and gas-phase formation of NH _2 CHO from H _2 CO. Chemical models including these reactions can reproduce the observed abundances in our target sources. |
| first_indexed | 2024-03-12T03:02:37Z |
| format | Article |
| id | doaj.art-f1b5cd337a4243fdae037cae0325e017 |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-12T03:02:37Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
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| series | The Astrophysical Journal |
| spelling | doaj.art-f1b5cd337a4243fdae037cae0325e0172023-09-03T14:42:23ZengIOP PublishingThe Astrophysical Journal1538-43572023-01-0195015710.3847/1538-4357/acca1dDigging into the Interior of Hot Cores with the ALMA (DIHCA). III. The Chemical Link between NH2CHO, HNCO, and H2COKotomi Taniguchi0https://orcid.org/0000-0003-4402-6475Patricio Sanhueza1https://orcid.org/0000-0002-7125-7685Fernando A. Olguin2https://orcid.org/0000-0002-8250-6827Prasanta Gorai3https://orcid.org/0000-0003-1602-6849Ankan Das4https://orcid.org/0000-0003-4615-602XFumitaka Nakamura5https://orcid.org/0000-0001-5431-2294Masao Saito6https://orcid.org/0000-0003-0769-8627Qizhou Zhang7https://orcid.org/0000-0003-2384-6589Xing Lu8https://orcid.org/0000-0003-2619-9305Shanghuo Li9https://orcid.org/0000-0003-1275-5251Huei-Ru Vivien Chen10https://orcid.org/0000-0002-9774-1846National Astronomical Observatory of Japan, National Institutes of Natural Sciences , 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan ; kotomi.taniguchi@nao.ac.jpNational Astronomical Observatory of Japan, National Institutes of Natural Sciences , 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan ; kotomi.taniguchi@nao.ac.jp; Department of Astronomical Science, School of Physical Science, SOKENDAI (The Graduate University for Advanced Studies) , Osawa, Mitaka, Tokyo 181-8588, JapanInstitute of Astronomy and Department of Physics, National Tsing Hua University , Hsinchu 30013, Taiwan Department of Space, Earth and Environment, Chalmers University of Technology , SE-412 96, Gothenburg, SwedenInstitute of Astronomy Space and Earth Science , AJ 316, Salt lake, Sector II, Kolkata 700091, IndiaNational Astronomical Observatory of Japan, National Institutes of Natural Sciences , 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan ; kotomi.taniguchi@nao.ac.jp; Department of Astronomical Science, School of Physical Science, SOKENDAI (The Graduate University for Advanced Studies) , Osawa, Mitaka, Tokyo 181-8588, JapanNational Astronomical Observatory of Japan, National Institutes of Natural Sciences , 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan ; kotomi.taniguchi@nao.ac.jp; Department of Astronomical Science, School of Physical Science, SOKENDAI (The Graduate University for Advanced Studies) , Osawa, Mitaka, Tokyo 181-8588, JapanCenter for Astrophysics | Harvard & Smithsonian , 60 Garden St., Cambridge, MA 02138, USAShanghai Astronomical Observatory, Chinese Academy of Sciences , 80 Nandan Road, Shanghai 200030, People's Republic of ChinaMax Planck Institute for Astronomy , Konigstuhl 17, D-69117 Heidelberg, GermanyInstitute of Astronomy and Department of Physics, National Tsing Hua University , Hsinchu 30013, Taiwan We have analyzed the NH _2 CHO, HNCO, H _2 CO, and CH _3 CN ( ^13 CH _3 CN) molecular lines at an angular resolution of ∼0.″3 obtained by the Atacama Large Millimeter/submillimeter Array Band 6 toward 30 high-mass star-forming regions. The NH _2 CHO emission has been detected in 23 regions, while the other species have been detected toward 29 regions. A total of 44 hot molecular cores (HMCs) have been identified using the moment 0 maps of the CH _3 CN line. The fractional abundances of the four species have been derived at each HMC. In order to investigate pure chemical relationships, we have conducted a partial correlation test to exclude the effect of temperature. Strong positive correlations between NH _2 CHO and HNCO ( ρ = 0.89) and between NH _2 CHO and H _2 CO (0.84) have been found. These strong correlations indicate their direct chemical links; dual-cyclic hydrogen addition and abstraction reactions between HNCO and NH _2 CHO and gas-phase formation of NH _2 CHO from H _2 CO. Chemical models including these reactions can reproduce the observed abundances in our target sources.https://doi.org/10.3847/1538-4357/acca1dAstrochemistryInterstellar moleculesMassive starsStar formation |
| spellingShingle | Kotomi Taniguchi Patricio Sanhueza Fernando A. Olguin Prasanta Gorai Ankan Das Fumitaka Nakamura Masao Saito Qizhou Zhang Xing Lu Shanghuo Li Huei-Ru Vivien Chen Digging into the Interior of Hot Cores with the ALMA (DIHCA). III. The Chemical Link between NH2CHO, HNCO, and H2CO The Astrophysical Journal Astrochemistry Interstellar molecules Massive stars Star formation |
| title | Digging into the Interior of Hot Cores with the ALMA (DIHCA). III. The Chemical Link between NH2CHO, HNCO, and H2CO |
| title_full | Digging into the Interior of Hot Cores with the ALMA (DIHCA). III. The Chemical Link between NH2CHO, HNCO, and H2CO |
| title_fullStr | Digging into the Interior of Hot Cores with the ALMA (DIHCA). III. The Chemical Link between NH2CHO, HNCO, and H2CO |
| title_full_unstemmed | Digging into the Interior of Hot Cores with the ALMA (DIHCA). III. The Chemical Link between NH2CHO, HNCO, and H2CO |
| title_short | Digging into the Interior of Hot Cores with the ALMA (DIHCA). III. The Chemical Link between NH2CHO, HNCO, and H2CO |
| title_sort | digging into the interior of hot cores with the alma dihca iii the chemical link between nh2cho hnco and h2co |
| topic | Astrochemistry Interstellar molecules Massive stars Star formation |
| url | https://doi.org/10.3847/1538-4357/acca1d |
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