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Salt and Hot Water around Massive Protostars

14 Jul 2020, 05:30 UTC
Salt and Hot Water around Massive Protostars
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Title: Salt, Hot Water, and Silicon Compounds Tracing Massive Twin DisksAuthors: Kei E. I. Tanaka, Yichen Zhang, Tomoya Hirota, Nami Sakai, Kazuhito Motogi, Kengo Tomida, Jonathan C. Tan, Viviana Rosero, Aya E. Higuchi, Satoshi Ohashi, Mengyao Liu, Koichiro SugiyamaFirst Author’s Institution: National Astronomical Observatory of Japan, Mitaka, Tokyo, JapanStatus: Submitted to The Astrophysical Journal Letters [open access on arXiv]

How Do Massive Stars Form?Massive stars have an outsized impact on their local environments and throughout entire galaxies, as they are important sources of UV radiation, turbulent energy, and heavy elements. But relative to their low-mass counterparts, the formation of high-mass stars is still unclear. It is unknown whether massive protostars accrete through disks – a scaled-up version of low-mass star formation – or form through an otherwise distinct mechanism. While recent theoretical work and simulations support this disk accretion model, detecting the presence of such disks is not free from observationally difficulties. To do so, observers seek to identify the signatures of rotating gas within these disks by using molecular emission lines at millimeter wavelengths. But high spatial resolutions are required to correctly disentangle emission from molecules in the inner disk versus those associated with surrounding gas structures, such as ...

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