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

Abstract

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, such as CH3CN, which 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 Msun. This finding is consistent with the results of a recent study of the CO first overtone bandhead emission at 2.3mum towards G35.20-0.74 N. The disk radius and mass are >2500 au and 3 Msun. To reconcile the observed bolometric luminosity (3x10^4 Lsun) with the estimated stellar mass of 18 Msun, we propose that the latter is the total mass of a binary system.

5 pages, 4 figures, accepted for publication in Astronomy and Astrophysics Letters

References in corpus (3)

• Star formation through gravitational collapse and competitive accretion
• Multiple Jets from the High-Mass (Proto)stellar Cluster AFGL5142
• The Remarkable Mid-Infrared Jet of Massive Young Stellar Object G35.20-0.74

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