Letter to the Editor

Revealing the environs of the remarkable southern hot core G327.3–0.6

¹ Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany e-mail: wyrowski@mpifr-bonn.mpg.de
² European Southern Observatory, Alonso de Cordova 3107, Vitacura Casilla 19001, Santiago 19, Chile
³ Onsala Space Observatory, Chalmers University of Technology, 439 92 Onsala, Sweden

Received: 3 April 2006
Accepted: 9 May 2006

Abstract

Aims.We present a submm study of the massive hot core G327.3-0.6 that constrains its physical parameters and environment.

Methods.The APEX telescope was used to image CO and  emission, to observe lines from other molecules toward a hot and a cold molecular core, and to measure the continuum flux density of the hot core.

Results.In the   line, two clumps were found, one associated with the Hii region G327.3-0.5 and the other associated with the hot core. An additional cold clump is found 30´´ (0.4 pc) northeast of the hot core in bright  emission. From the the continuum data, we calculate a mass of 420  and a size of 0.1 pc for the hot core. A new, more accurate position of the hot core is reported, which allows the association of the core with a bright mid-infrared source. The luminosity of the hot core is estimated to be between 5 and  .

Conclusions.This study revealed several different evolutionary stages of massive star formation in the G327.3-0.6 region.