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À propos de : A candidate circumbinary Keplerian disk in G35.20-0.74 N: A study with ALMA        

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  • A candidate circumbinary Keplerian disk in G35.20-0.74 N: A study with ALMA
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  • We report on ALMA observations of continuum and molecular line emission with 0. "4 resolution towards the high-mass star-forming region G35.20-0.74 N. Two dense cores are detected in typical hot-core tracers (e.g., CH 3CN) that reveal velocity gradients. In one of these cores, the velocity field can be fitted with an almost edge-on Keplerian disk rotating about a central mass of  ~18  M⊙. This finding is consistent with the results of a recent study of the CO first overtone bandhead emission at 2.3  μm towards G35.20-0.74 N. The disk radius and mass are  ≳2500 au and  ~3  M⊙. To reconcile the observed bolometric luminosity (~3 × 10 4  L⊙) with the estimated stellar mass of 18  M⊙, we propose that the latter is the total mass of a binary system.
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  • aa21134-13
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  • © ESO, 2013
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