VLA observations of candidate high-mass protostellar objects at 7 mm

Details VLA observations of candidate high-mass protostellar objects at 7 mm VLA observations of candidate high-mass protostellar objects at 7 mm

2007-05-27

arxiv.org/abs/0705.3970v1

Astron.J.134:906-911,2007

Astronomy and Astrophysics

Astrophysics

17 pages, 5 figures, accepted by The Astronomical Journal

Scientific paper

10.1086/520334

We present radio continuum observations at 7 mm made using the Very Large Array towards three massive star forming regions thought to be in very early stages of evolution selected from the sample of Sridharan et al. (2002). Emission was detected towards all three sources (IRAS 18470-0044, IRAS 19217+1651 and IRAS 23151+5912). We find that in all cases the 7 mm emission corresponds to thermal emission from ionized gas. The regions of ionized gas associated with IRAS 19217+1651 and IRAS 23151+5912 are hypercompact with diameters of 0.009 and 0.0006 pc, and emission measures of 7.0 x 10^8 and 2.3 x 10^9 pc cm^(-6), respectively.

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