We have observed 29 transitions corresponding to 12 distinct species and 7 additional isotopologs toward the deeply embedded Class 0 young stellar object Ser-emb 1 with the Atacama Large Millimeter Array at \sim 1 mm .
The detected species include CH _ { 3 } OH and two complex organic molecules , CH _ { 3 } OCH _ { 3 } and CH _ { 3 } OCHO .
The emission of CH _ { 3 } OH and the two COMs is compact , and the CH _ { 3 } OH rotational temperature is 261 \pm 46 K , implying that Ser-emb 1 hosts a hot corino .
The derived CH _ { 3 } OH , CH _ { 3 } OCH _ { 3 } and CH _ { 3 } OCHO column densities are at least ( 1.2 \pm 0.4 ) \times 10 ^ { 17 } cm ^ { -2 } , ( 9.2 \pm 3.8 ) \times 10 ^ { 16 } cm ^ { -2 } , and ( 9.1 \pm 3.6 ) \times 10 ^ { 16 } cm ^ { -2 } , respectively , comparable to the values found for other Class 0 hot corinos .
In addition , we observe evidence of rotation at compact scales : two of the more strongly detected lines , corresponding to C ^ { 18 } O and H _ { 2 } CO present spatially resolved red- and blue-shifted compact emission orthogonal to the direction of a jet and outflow traced by CO , SiO , and several other molecules .
The spatial coincidence of the hot corino emission and a possible disk in a compact region around the central protostar suggests that these structures may be physically and/or chemically related .