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Axisymmetry in proto-planetary nebulae: using imaging polarimetry to investigate envelope structure
T. M. Gledhill, A. Chrysostomou, J. H. Hough +1
We use ground-based imaging polarimetry to detect and image the dusty circumstellar envelopes of a sample of proto-planetary nebulae (PPNe) at near-infrared wavelengths. We detect…
HST infrared imaging polarimetry of Centaurus A: implications for the unified scheme and the existence of a mis-directed BL Lac nucleus
A. Capetti, E. J. Schreier, D. J. Axon +6
We report results from HST/NICMOS 2 micron imaging polarimetry of the central region of Centaurus A. In the vicinity of the nucleus we observe a complex polarization structure whic…
Detection of polarized mm and submm emission from SgrA*
D. K. Aitken, J. S. Greaves, A. Chrysostomou +4
We report the detection of linear polarization from SgrA* at 750, 850, 1350 and 2000 microns which confirms the contribution of synchrotron radiation. From the lack of polarization…
Modelling the Infrared continuum of Centaurus A
D. M. Alexander, A. Efstathiou, J. H. Hough +4
We present ISOPHOT_S, ISOSWS and 8 to 13 micron ground based observations of Centaurus A that show prominent PAH and silicate features. These and other data are used to construct a…
A Near Infrared Polarized Bipolar Cone in the CIRCINUS Galaxy
M. Ruiz, D. M. Alexander, S. Young +3
We present near-infrared broad-band polarization images of the nuclear regions of the Circinus galaxy in the J, H and K bands. For the first time the south-eastern reflection cone…
Highly polarized structures in the near-nuclear regions of Cygnus A: intrinsic anisotropy within the cones?
C. N. Tadhunter, W. Sparks, D. J. Axon +6
We present near-IR imaging polarimetry observations of the nucleus of Cygnus A, taken with the NICMOS camera of the HST at a wavelength of 2.0 microns.These maps reveal a highly co…