The Volatile Composition of the Inner Coma of Comet 46P/Wirtanen: Coordinated Observations Using iSHELL at the NASA-IRTF and Keck/NIRSPEC-2
| العنوان: | The Volatile Composition of the Inner Coma of Comet 46P/Wirtanen: Coordinated Observations Using iSHELL at the NASA-IRTF and Keck/NIRSPEC-2 |
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| المؤلفون: | Erika L. Gibb, Nicolas Biver, Emmanuel Jehin, Jacques Crovisier, Michael A. DiSanti, Ronald J. Vervack, Nathaniel X. Roth, Mohammad Saki, Neil Dello Russo, Harold A. Weaver, Hideyo Kawakita, Boncho P. Bonev, Adam J. McKay, Anita L. Cochran, Martin A. Cordiner, Younas Khan |
| المساهمون: | GSFC Solar System Exploration Division, NASA Goddard Space Flight Center (GSFC), Johns Hopkins University (JHU), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | The Planetary Science Journal The Planetary Science Journal, IOP Science, 2021, 2 (2), pp.54. ⟨10.3847/PSJ/abd706/54⟩ |
| بيانات النشر: | American Astronomical Society, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | 010504 meteorology & atmospheric sciences, media_common.quotation_subject, Infrared telescope, Comet, [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], Northern Hemisphere, Astronomy, Astronomy and Astrophysics, Coma (optics), Molecular spectroscopy, 01 natural sciences, Geophysics, 13. Climate action, Space and Planetary Science, Observatory, Sky, 0103 physical sciences, Earth and Planetary Sciences (miscellaneous), Environmental science, 010303 astronomy & astrophysics, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences, media_common |
| الوصف: | The 2018 perihelion passage of comet 46P/Wirtanen afforded an opportunity to measure the abundances and spatial distributions of coma volatiles in a Jupiter-family comet with exceptional spatial resolution for several weeks surrounding its closest approach to Earth (Δmin ∼0.078 au on UT December 16). We conducted near-infrared spectroscopic observations of 46P/Wirtanen using iSHELL at the NASA Infrared Telescope Facility on UT 2018 December 18 in direct coordination with observations using the newly upgraded NIRSPEC-2 instrument at the W. M. Keck Observatory, and securely detected fluorescent emission from CH3OH, C2H6, and H2O. This coordinated campaign utilizing the two premier near-infrared facilities in the northern hemisphere enabled us to sample distinct projections of the coma into the plane of the sky simultaneously, and provided an unprecedented view into the inner coma of 46P/Wirtanen near closest approach. We report rotational temperatures, production rates, and abundance ratios (i.e., mixing ratios) for all sampled species and compare our iSHELL results to simultaneous (or near-simultaneous) measurements taken with NIRSPEC-2. We demonstrate the extraordinary synergy of coordinated measurements using iSHELL and NIRSPEC-2, and advocate for future cometary studies that jointly leverage the capabilities of these two facilities. |
| تدمد: | 2632-3338 |
| DOI: | 10.3847/psj/abd706/54 |
| DOI: | 10.3847/PSJ/abd706/54⟩ |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d38275dfcd676bf9fbbb18ff027621b6 https://doi.org/10.3847/psj/abd706/54 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....d38275dfcd676bf9fbbb18ff027621b6 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 26323338 |
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| DOI: | 10.3847/psj/abd706/54 |