Open AccessThermal and non‐thermal radio variations in WR 147
Author(s) -
Watson S. K.,
Davis R. J.,
Williams P. M.,
Bode M. F.
Publication year - 2002
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.2002.05553.x
Subject(s) - physics , astrophysics , outflow , interferometry , merlin (protein) , thermal , very long baseline interferometry , astronomy , meteorology , medicine , cancer , suppressor
Abstract We present new, high‐resolution (70‐mas) radio images of the colliding wind system WR 147 observed with Multi‐element Radio‐linked Interferometer Network (MERLIN), which show significant differences in the structures of both the thermally emitting WN8 stellar component (WR 147S) and the non‐thermal wind‐collision source (WR 147N). The size and shape of WR 147N change between the first and last epochs, as does the position of the emitting material. The presence of low‐intensity emission between WR 147S and WR 147N is confirmed in one 5‐GHz epoch, and this, together with the southerly movement of faint emission blobs seen by ourselves and Contreras & Rodríguez, suggests a north–south preferential outflow axis.