Radio Images of Wolf-Rayet 147
Abstract
We present preliminary MERLIN radio maps at 1.7 and 5GHz of the Wolf-Rayet star WR147 (AS431). These provide the highest spatial resolution images of this object at these frequencies to date. Our results confirm that WR147 comprises two primary radio sources lying on a N-S axis. Combining results at 1.7 and 5 GHz gives a spectrum for the southerly source consistent with optically thick thermal emission.The northerly source appears to be non-thermal. In addition, extended emission is observed at both frequencies which links the two sources. The northerly source is elongated in a direction roughly perpendicular to the axis of this extended emission, and the southerly source appears double on the 5 GHz map.
Keywords
Radio Image High Spatial Resolution Image Star WR147 Extended Emission VLBI DataPreview
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References
- Churchwell, E.B., Bieging, J.H., van der Hucht, K.A., Williams, P.M., Spoelstra, T.A.Th., Abbott, D.C. 1992, ApJ 393, 329ADSCrossRefGoogle Scholar
- Hogbom, J.A. 1974, A&A Suppl. 15, 417ADSGoogle Scholar
- Moran, J.P., Davis, R.J., Bode, M.F., Taylor, A.R., Spencer, R.E., Argue, A.N., Irwin, M.J., Shanklin, J.D. 1989, Nature 340, 449ADSCrossRefGoogle Scholar
- Peckham, R.J. 1973, MNRAS 165, 25ADSGoogle Scholar
- Schwab, F. 1980, Proc. Soc. Photo-Optical Instr. Engin. 231, 18ADSGoogle Scholar