Digging into the Interior of Hot Cores with ALMA (DIHCA). I. Dissecting the High-mass Star-forming Core G335.579-0.292 MM1

Abstract We observed the high-mass star-forming region G335.579–0.292 with Atacama Large Millimeter/submillimeter Array (ALMA) at 226 GHz an angular resolution of 0.?3 (?1000 au source distance). hosts one most massive cores in Galaxy (G335–MM1). The continuum emission shows that G335–MM1 fragments into least five sources, while molecular line is detected two sources (ALMA1 and ALMA3). found evidence large- small-scale infall ALMA1 revealed by inverse P-Cygni profile presence a blueshifted spot center first moment map CH 3 CN emission. In addition, hot gas expansion innermost unveiled redshifted HDCO (CH ) 2 CO (both E u > 1100 K). Our modeling reveals this motion originates close to central source, likely due reversal accretion flow induced H ii region, rotation motions originate outer regions. ALMA3 clear signs rotation, axis inclination respect sight 90°, system mass (disk + star) range 10–30 M ? .