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- W3100974792 endingPage "1428" @default.
- W3100974792 startingPage "1422" @default.
- W3100974792 abstract "Sensitive and high angular resolution ($sim$ 0.4arcsec) SO$_2$[22$_{2,20}$ $to$ 22$_{1,21}$] and SiO[5$to$4] line and 1.3 and 7 mm continuum observations made with the Submillimeter Array (SMA) and the Very Large Array (VLA) towards the young massive cluster W51 IRS2 are presented. We report the presence of a large (of about 3000 AU) and massive (40 M$_odot$) dusty circumstellar disk and a hot gas molecular ring around a high-mass protostar or a compact small stellar system associated with W51 North. The simultaneous observations of the silicon monoxide molecule, an outflow gas tracer, further revealed a massive (200 M$_odot$) and collimated ($sim14^circ$) outflow nearly perpendicular to the dusty and molecular structures suggesting thus the presence of a single very massive protostar with a bolometric luminosity of more than 10$^5$ L$_odot$. A molecular hybrid LTE model of a Keplerian and infalling ring with an inner cavity and a central stellar mass of more than 60 M$_odot$ agrees well with the SO$_2$[22$_{2,20}$ $to$ 22$_{1,21}$] line observations. Finally, these results suggest that mechanisms, such as mergers of low- and intermediate- mass stars, might be not necessary for forming very massive stars." @default.
- W3100974792 created "2020-11-23" @default.
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- W3100974792 date "2009-06-01" @default.
- W3100974792 modified "2023-10-18" @default.
- W3100974792 title "A RING/DISK/OUTFLOW SYSTEM ASSOCIATED WITH W51 NORTH: A VERY MASSIVE STAR IN THE MAKING" @default.
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- W3100974792 doi "https://doi.org/10.1088/0004-637x/698/2/1422" @default.
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