Complex Organic Molecules in a Very Young Hot Corino, HOPS 373SW
We present the spectra of complex organic molecules (COMs) detected in HOPS 373SW with the Atacama Large Millimeter/submillimeter Array (ALMA). HOPS 373SW, which is a component of a protostellar binary with a separation of 1500au, has been discovered as a variable protostar by the JCMT transient mon...
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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/ace34b |
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| author | Jeong-Eun Lee Giseon Baek Seokho Lee Jae-Hong Jeong Chul-Hwan Kim Yuri Aikawa Gregory J. Herczeg Doug Johnstone John J. Tobin |
| author_facet | Jeong-Eun Lee Giseon Baek Seokho Lee Jae-Hong Jeong Chul-Hwan Kim Yuri Aikawa Gregory J. Herczeg Doug Johnstone John J. Tobin |
| author_sort | Jeong-Eun Lee |
| collection | DOAJ |
| description | We present the spectra of complex organic molecules (COMs) detected in HOPS 373SW with the Atacama Large Millimeter/submillimeter Array (ALMA). HOPS 373SW, which is a component of a protostellar binary with a separation of 1500au, has been discovered as a variable protostar by the JCMT transient monitoring survey with a modest (∼30%) brightness increase at submillimeter wavelengths. Our ALMA target-of-opportunity observation at ∼345 GHz for HOPS 373SW revealed extremely young chemical characteristics with strong deuteration of methanol. The dust continuum opacity is very high toward the source center, obscuring line emission from within 0.″03. The other binary component, HOPS 373NE, was detected only in C ^17 O in our observation, implying a cold and quiescent environment. We compare the COM abundances relative to CH _3 OH in HOPS 373SW with those of V883 Ori, which is an eruptive disk object, as well as other hot corinos, to demonstrate the chemical evolution from envelope to disk. High abundances of singly, doubly, and triply deuterated methanol (CH _2 DOH, CHD _2 OH, and CD _3 OH) and a low CH _3 CN abundance in HOPS 373SW compared to other hot corinos suggest a very early evolutionary stage of HOPS 373SW in the hot corino phase. Since the COMs detected in HOPS 373SW would have been sublimated very recently from grain surfaces, HOPS 373SW is a promising place to study the surface chemistry of COMs in the cold prestellar phase before sublimation. |
| first_indexed | 2024-03-11T19:50:29Z |
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| id | doaj.art-73c92119299d4d5d95d053057b667d1d |
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| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-11T19:50:29Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
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| series | The Astrophysical Journal |
| spelling | doaj.art-73c92119299d4d5d95d053057b667d1d2023-10-05T09:58:38ZengIOP PublishingThe Astrophysical Journal1538-43572023-01-0195614310.3847/1538-4357/ace34bComplex Organic Molecules in a Very Young Hot Corino, HOPS 373SWJeong-Eun Lee0https://orcid.org/0000-0003-3119-2087Giseon Baek1https://orcid.org/0000-0002-2814-1978Seokho Lee2https://orcid.org/0000-0002-0226-9295Jae-Hong Jeong3https://orcid.org/0009-0005-6319-8485Chul-Hwan Kim4https://orcid.org/0000-0002-2523-3762Yuri Aikawa5https://orcid.org/0000-0003-3283-6884Gregory J. Herczeg6https://orcid.org/0000-0002-7154-6065Doug Johnstone7https://orcid.org/0000-0002-6773-459XJohn J. Tobin8https://orcid.org/0000-0002-6195-0152Department of Physics and Astronomy, Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea; SNU Astronomy Research Center, Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of KoreaDepartment of Physics and Astronomy, Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea; Research Institute of Basic Sciences, Seoul National University , Seoul 08826, Republic of KoreaKorea Astronomy and Space Science Institute , 776 Daedeok-daero, Yuseong, Daejeon 34055, Republic of KoreaDepartment of Physics and Astronomy, Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of KoreaDepartment of Physics and Astronomy, Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of KoreaDepartment of Astronomy, University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, JapanKavli Institute for Astronomy and Astrophysics, Peking University , Yiheyuan 5, Haidian Qu, 100871 Beijing, People's Republic of China; Department of Astronomy, Peking University , Yiheyuan 5, Haidian Qu, 100871 Beijing, People's Republic of ChinaNRC Herzberg Astronomy and Astrophysics , 5071 West Saanich Road, Victoria, BC, V9E 2E7, Canada; Department of Physics and Astronomy, University of Victoria , Victoria, BC, V8P 5C2, CanadaNational Radio Astronomy Observatory , 520 Edgemont Road, Charlottesville, VA 22903, USAWe present the spectra of complex organic molecules (COMs) detected in HOPS 373SW with the Atacama Large Millimeter/submillimeter Array (ALMA). HOPS 373SW, which is a component of a protostellar binary with a separation of 1500au, has been discovered as a variable protostar by the JCMT transient monitoring survey with a modest (∼30%) brightness increase at submillimeter wavelengths. Our ALMA target-of-opportunity observation at ∼345 GHz for HOPS 373SW revealed extremely young chemical characteristics with strong deuteration of methanol. The dust continuum opacity is very high toward the source center, obscuring line emission from within 0.″03. The other binary component, HOPS 373NE, was detected only in C ^17 O in our observation, implying a cold and quiescent environment. We compare the COM abundances relative to CH _3 OH in HOPS 373SW with those of V883 Ori, which is an eruptive disk object, as well as other hot corinos, to demonstrate the chemical evolution from envelope to disk. High abundances of singly, doubly, and triply deuterated methanol (CH _2 DOH, CHD _2 OH, and CD _3 OH) and a low CH _3 CN abundance in HOPS 373SW compared to other hot corinos suggest a very early evolutionary stage of HOPS 373SW in the hot corino phase. Since the COMs detected in HOPS 373SW would have been sublimated very recently from grain surfaces, HOPS 373SW is a promising place to study the surface chemistry of COMs in the cold prestellar phase before sublimation.https://doi.org/10.3847/1538-4357/ace34bStar formationAstrochemistry |
| spellingShingle | Jeong-Eun Lee Giseon Baek Seokho Lee Jae-Hong Jeong Chul-Hwan Kim Yuri Aikawa Gregory J. Herczeg Doug Johnstone John J. Tobin Complex Organic Molecules in a Very Young Hot Corino, HOPS 373SW The Astrophysical Journal Star formation Astrochemistry |
| title | Complex Organic Molecules in a Very Young Hot Corino, HOPS 373SW |
| title_full | Complex Organic Molecules in a Very Young Hot Corino, HOPS 373SW |
| title_fullStr | Complex Organic Molecules in a Very Young Hot Corino, HOPS 373SW |
| title_full_unstemmed | Complex Organic Molecules in a Very Young Hot Corino, HOPS 373SW |
| title_short | Complex Organic Molecules in a Very Young Hot Corino, HOPS 373SW |
| title_sort | complex organic molecules in a very young hot corino hops 373sw |
| topic | Star formation Astrochemistry |
| url | https://doi.org/10.3847/1538-4357/ace34b |
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