دورية أكاديمية

Chemistry of Complex Organic Molecules in the V883 Ori Disk Revealed by ALMA Band 3 Observations

التفاصيل البيبلوغرافية
العنوان: Chemistry of Complex Organic Molecules in the V883 Ori Disk Revealed by ALMA Band 3 Observations
المؤلفون: Yoshihide Yamato, Shota Notsu, Yuri Aikawa, Yuki Okoda, Hideko Nomura, Nami Sakai
المصدر: The Astronomical Journal, Vol 167, Iss 2, p 66 (2024)
بيانات النشر: IOP Publishing, 2024.
سنة النشر: 2024
المجموعة: LCC:Astronomy
مصطلحات موضوعية: Astrochemistry, Protoplanetary disks, Astronomy, QB1-991
الوصف: Complex organic molecules (COMs) in protoplanetary disks are key to understanding the origin of volatiles in comets in our solar system, yet the chemistry of COMs in protoplanetary disks remains poorly understood. Here, we present Atacama Large Millimeter/submillimeter Array Band 3 observations of the disk around the young outbursting star V883 Ori, where the COMs sublimate from ices and are thus observable thanks to the warm condition of the disk. We have robustly identified ten oxygen-bearing COMs including ^13 C isotopologues in the disk-integrated spectra. The radial distributions of the COM emission, revealed by the detailed analyses of the line profiles, show the inner emission cavity, similar to the previous observations in Band 6 and Band 7. We found that the COMs abundance ratios with respect to methanol are significantly higher than those in the warm protostellar envelopes of IRAS 16293-2422 and similar to the ratios in the solar system comet 67P/Churyumov-Gerasimenko, suggesting the efficient (re)formation of COMs in protoplanetary disks. We also constrained the ^12 C/ ^13 C and D/H ratios of COMs in protoplanetary disks for the first time. The ^12 C/ ^13 C ratios of acetaldehyde, methyl formate, and dimethyl ether are consistently lower (∼20–30) than the canonical ratio in the interstellar medium (∼69), indicating the efficient ^13 C-fractionation of CO. The D/H ratios of methyl formate are slightly lower than the values in IRAS 16293-2422, possibly pointing to the destruction and reformation of COMs in disks. We also discuss the implications for nitrogen and sulfur chemistry in protoplanetary disks.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 1538-3881
Relation: https://doaj.org/toc/1538-3881
DOI: 10.3847/1538-3881/ad11d9
URL الوصول: https://doaj.org/article/29f990b726f24c75a6009d51700be1da
رقم الأكسشن: edsdoj.29f990b726f24c75a6009d51700be1da
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:15383881
DOI:10.3847/1538-3881/ad11d9