Abundant hydrocarbons in the disk around a very-low-mass star

• 成果类型: Article
• 署名作者: Arabhavi, A. M.; Kamp, I.; Henning, Th.; van Dishoeck, E. F.; Christiaens, V.; Gasman, D.; Perrin, A.; Guedel, M.; Tabone, B.; Kanwar, J.; Waters, L. B. F. M.; Pascucci, I.; Samland, M.; Perotti, G.; Bettoni, G.; Grant, S. L.; Lagage, P. O.; Ray, T. P.; Vandenbussche, B.; Absil, O.; Argyriou, I.; Barrado, D.; Boccaletti, A.; Bouwman, J.; Garatti, A.; Glauser, A. M.; Lahuis, F.; Mueller, M.; Olofsson, G.; Pantin, E.; Scheithauer, S.; Morales-Calderon, M.; Franceschi, R.; Jang, H.; Pawellek, N.; Rodgers-Lee, D.; Schreiber, J.; Schwarz, K.; Temmink, M.; Vlasblom, M.; Wright, G.; Colina, L.; Oestlin, G.
• 署名单位: University of Groningen; Kapteyn Astronomical Institute; Max Planck Society; Leiden University; Leiden University - Excl LUMC; Max Planck Society; University of Liege; KU Leuven; Institut Polytechnique de Paris; Ecole Polytechnique; Sorbonne Universite; Centre National de la Recherche Scientifique (CNRS); University of Vienna; Centre National de la Recherche Scientifique (CNRS); Universite Paris Saclay; Sorbonne Universite; Austrian Academy of Sciences; Graz University of Technology; Radboud University Nijmegen; University of Arizona; Universite Paris Saclay; Centre National de la Recherche Scientifique (CNRS); CEA; Universite Paris Cite; Dublin Institute for Advanced Studies; Consejo Superior de Investigaciones Cientificas (CSIC); CSIC - Centro de Astrobiologia (INTA); Sorbonne Universite; Universite PSL; Observatoire de Paris; Istituto Nazionale Astrofisica (INAF); Stockholm University; HUN-REN; HUN-REN Research Centre for Astronomy & Earth Sciences; Konkoly Thege Miklos Astronomical Institute; University of Edinburgh; Consejo Superior de Investigaciones Cientificas (CSIC); CSIC - Centro de Astrobiologia (INTA)
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-8970
• DOI: 10.1126/science.adi8147
• 发表日期: 2024-06-07
• 页码: 1086-1090
• 关键词: planet formation; xmm-newton; propyne; region; water; dust; line; chemistry; emission; SPECTRA

摘要

Very-low-mass stars (those less than 0.3 solar masses) host orbiting terrestrial planets more frequently than other types of stars. The compositions of those planets are largely unknown but are expected to relate to the protoplanetary disk in which they form. We used James Webb Space Telescope mid-infrared spectroscopy to investigate the chemical composition of the planet-forming disk around ISO-ChaI 147, a 0.11-solar-mass star. The inner disk has a carbon-rich chemistry; we identified emission from 13 carbon-bearing molecules, including ethane and benzene. The high column densities of hydrocarbons indicate that the observations probe deep into the disk. The high carbon-to-oxygen ratio indicates radial transport of material within the disk, which we predict would affect the bulk composition of any planets forming in the disk.