Laboratory Measurement of CH317OH Transitions in the Frequency Range from 216 to 264 GHz for Astronomical Application
Methanol is one of the most abundant complex organic molecules in interstellar environments. Molecular lines of its rare isotopologues ^12 CH _3 ^17 OH and ^12 CH _3 ^18 OH therefore play a crucial role in examining the column density of ^12 CH _3 ^16 OH, which serves as a reference for organic mole...
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2025-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/ad9b16 |
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| author | Akemi Tamanai Takahiro Oyama Yoshimasa Watanabe Takeshi Sakai Riouhei Nakatani Shaoshan Zeng Isabelle Kleiner Nami Sakai |
| author_facet | Akemi Tamanai Takahiro Oyama Yoshimasa Watanabe Takeshi Sakai Riouhei Nakatani Shaoshan Zeng Isabelle Kleiner Nami Sakai |
| author_sort | Akemi Tamanai |
| collection | DOAJ |
| description | Methanol is one of the most abundant complex organic molecules in interstellar environments. Molecular lines of its rare isotopologues ^12 CH _3 ^17 OH and ^12 CH _3 ^18 OH therefore play a crucial role in examining the column density of ^12 CH _3 ^16 OH, which serves as a reference for organic molecular chemistry in interstellar clouds. In this study, we have recorded the spectroscopic emission spectrum of ^12 CH _3 ^17 OH in the frequency range between 216 and 264 GHz by making use of an emission-type millimeter and submillimeter spectrometer. We have specifically paid attention to the Q -branch transitions, which are the strongest line series in this frequency region. Among the stable oxygen isotopes, ^16 O, ^17 O, and ^18 O of methanol, only ^12 CH _3 ^17 OH obviously shows line profiles having double and/or triple peaks in low- J transitions, due to the nuclear quadrupole interaction. The newly obtained ^12 CH _3 ^17 OH data will play an important role in facilitating a deeper understanding of the organic chemistry related to star and planet formation. The ^12 CH _3 ^17 OH line data allow us to trace and constrain the isotopic ratio ^17 O/ ^18 O in methanol, which is efficient to investigate the galactic-scale evolution of elements. In addition, we also assigned some transitions of ^13 CH _3 ^17 OH in the recorded spectrum. |
| format | Article |
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| institution | Kabale University |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj-art-ff25decd3d574a7da402fa7d7aca55c02025-02-06T11:58:38ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-01980111010.3847/1538-4357/ad9b16Laboratory Measurement of CH317OH Transitions in the Frequency Range from 216 to 264 GHz for Astronomical ApplicationAkemi Tamanai0Takahiro Oyama1https://orcid.org/0000-0002-2301-7951Yoshimasa Watanabe2https://orcid.org/0000-0002-9668-3592Takeshi Sakai3https://orcid.org/0000-0003-4521-7492Riouhei Nakatani4https://orcid.org/0000-0002-1803-0203Shaoshan Zeng5https://orcid.org/0000-0003-3721-374XIsabelle Kleiner6https://orcid.org/0000-0002-8715-9764Nami Sakai7https://orcid.org/0000-0002-3297-4497RIKEN Cluster for Pioneering Research , 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan ; nami.sakai@riken.jpRIKEN Cluster for Pioneering Research , 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan ; nami.sakai@riken.jpRIKEN Cluster for Pioneering Research , 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan ; nami.sakai@riken.jp; Materials Science and Engineering, College of Engineering, Shibaura Institute of Technology , 3-7-5 Toyosu Koto-ku, Tokyo 135-8548, JapanGraduate School of Informatics and Engineering, The University of Electro-Communications , 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, JapanRIKEN Cluster for Pioneering Research , 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan ; nami.sakai@riken.jp; NASA Jet Propulsion Laboratory, California Institute of Technology , 4800 Oak Grove Drive, Pasadena, CA 91109, USARIKEN Cluster for Pioneering Research , 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan ; nami.sakai@riken.jpLaboratoire Interuniversitaire des Systèmes Atmosphériques (LISA), Université Paris Cité and Univ Paris Est Créteil , CNRS, LISA, F-75013 Paris, FranceRIKEN Cluster for Pioneering Research , 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan ; nami.sakai@riken.jpMethanol is one of the most abundant complex organic molecules in interstellar environments. Molecular lines of its rare isotopologues ^12 CH _3 ^17 OH and ^12 CH _3 ^18 OH therefore play a crucial role in examining the column density of ^12 CH _3 ^16 OH, which serves as a reference for organic molecular chemistry in interstellar clouds. In this study, we have recorded the spectroscopic emission spectrum of ^12 CH _3 ^17 OH in the frequency range between 216 and 264 GHz by making use of an emission-type millimeter and submillimeter spectrometer. We have specifically paid attention to the Q -branch transitions, which are the strongest line series in this frequency region. Among the stable oxygen isotopes, ^16 O, ^17 O, and ^18 O of methanol, only ^12 CH _3 ^17 OH obviously shows line profiles having double and/or triple peaks in low- J transitions, due to the nuclear quadrupole interaction. The newly obtained ^12 CH _3 ^17 OH data will play an important role in facilitating a deeper understanding of the organic chemistry related to star and planet formation. The ^12 CH _3 ^17 OH line data allow us to trace and constrain the isotopic ratio ^17 O/ ^18 O in methanol, which is efficient to investigate the galactic-scale evolution of elements. In addition, we also assigned some transitions of ^13 CH _3 ^17 OH in the recorded spectrum.https://doi.org/10.3847/1538-4357/ad9b16Molecular spectroscopyLine positionsExperimental dataAstrochemistry |
| spellingShingle | Akemi Tamanai Takahiro Oyama Yoshimasa Watanabe Takeshi Sakai Riouhei Nakatani Shaoshan Zeng Isabelle Kleiner Nami Sakai Laboratory Measurement of CH317OH Transitions in the Frequency Range from 216 to 264 GHz for Astronomical Application The Astrophysical Journal Molecular spectroscopy Line positions Experimental data Astrochemistry |
| title | Laboratory Measurement of CH317OH Transitions in the Frequency Range from 216 to 264 GHz for Astronomical Application |
| title_full | Laboratory Measurement of CH317OH Transitions in the Frequency Range from 216 to 264 GHz for Astronomical Application |
| title_fullStr | Laboratory Measurement of CH317OH Transitions in the Frequency Range from 216 to 264 GHz for Astronomical Application |
| title_full_unstemmed | Laboratory Measurement of CH317OH Transitions in the Frequency Range from 216 to 264 GHz for Astronomical Application |
| title_short | Laboratory Measurement of CH317OH Transitions in the Frequency Range from 216 to 264 GHz for Astronomical Application |
| title_sort | laboratory measurement of ch317oh transitions in the frequency range from 216 to 264 ghz for astronomical application |
| topic | Molecular spectroscopy Line positions Experimental data Astrochemistry |
| url | https://doi.org/10.3847/1538-4357/ad9b16 |
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