Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.246..565a&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Vol. 246, NO.4/OCT15, P. 565, 1990
Astronomy and Astrophysics
Astronomy
19
Scientific paper
We present high spatial resolution IR images and imaging polarimetry observations of the bipolar nebula/outflow source Sharpless 106. Observations were made at J H, K and 3.6 μm which characterize the morphology of the region, together with its IR photometric and polarimetric properties. We find that its morphology changes significantly over the observed wavelength range with IRS4 dominant longward of 1.25 μm. The disc region is seen to possess highly reddened IR colours, particularly to the north of IRS 4. The H and K polarization-vector maps are centro-symmetric about IRS4 over most of the nebula, with some possible deviations in regions of the disc having the largest IR colours. The polarized-flux map shows several bright plumes extending to the east, south and west of IRS 4, while the northern bipolar lobe appears uniform in nature. We conclude that IRS4 is the only illuminating source of the region at IR wavelengths and that the disc, and possibly the circumstellar envelope around IRS4, control the appearance of the region throughout the wavelength range studied.
Aspin Colin
Hayashi Saeko Suzuki
McLean Ian S.
Rayner John T.
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