We present Submillimeter Array observations of the young stellar object IRAS 04579+4703 in the 1.3 mm continuum and in the ^ { 12 } CO ( 2 - 1 ) , ^ { 13 } CO ( 2 - 1 ) and C ^ { 18 } O ( 2 - 1 ) lines .
The 1.3 mm continuum image reveals a flattened structure with a mass of 13 M _ { \odot } .
The ^ { 12 } CO ( 2 - 1 ) line map and position-velocity ( PV ) diagram , together with the broad wing ( full width = 30 km s ^ { -1 } ) of ^ { 12 } CO ( 2 - 1 ) line , clearly show that there is an outflow motion , which originates from an embedded massive YSO in this region .
The lengths of the blue-shifted and red-shifted lobes are 0.14 pc and 0.13 pc respectively .
The total gas mass , average dynamical timescale and mass entrainment rate of the outflow are 1.8 M _ { \odot } , 1.7 \times 10 ^ { 4 } yr and 1.1 \times 10 ^ { -4 } M _ { \odot } yr ^ { -1 } , respectively .
The flattened morphology of the continuum source perpendicular to the outflow direction , and the velocity gradient seen in the spectra of C ^ { 18 } O ( 2 - 1 ) taken from different locations along the major axis of the continuum source , suggest the presence of an accretion disk in this region .