Browsing by Author "Hough, J.H."

Now showing items 1-11 of 11

    • A high-sensitivity polarimeter using a ferro-electric liquid crystal modulator 

      Bailey, J.; Kedziora-Chudczer, Lucyna; Cotton, Daniel V.; Bott, Kimberly; Hough, J.H.; Lucas, P.W. (2015-05-21)
      We describe the HIgh Precision Polarimetric Instrument (HIPPI), a polarimeter built at UNSW (The University of New South Wales) Australia and used on the Anglo-Australian Telescope (AAT). HIPPI is an aperture polarimeter ...

    • High-sensitivity Stokes spectropolarimetry on cyanobacteria 

      Martin, Bill; Hesse, E.; Hough, J.H.; Gledhill, T.M. (2016-02-01)
      We investigate the spectral signatures arising from the optical properties of chlorophyll in linear and circularly polarised scattered light from cyanobacteria. We include Stokes scattering coefficient measurements on two ...

    • Magnetic field structures in star-forming regions : mid-infrared imaging polarimetry of K3-50 

      Barnes, Peter; Li, D.; Telesco, C.; Tanakul, N.; Mariñas, N.; Wright, C.; Packham, C.; Pantin, E.; Roche, P.; Hough, J.H. (2015-11-01)
      We report new imaging polarimetry observations of the Galactic compact H ii region K3-50 using CanariCam at the Gran Telescopio Canarias. We use a standard polarimetric analysis technique, first outlined by Aitken, to ...

    • Near-infrared Circular Polarization Images of NGC 6334-V 

      Kwon, J.; Tamura, M.; Lucas, P.W.; Hashimoto, J.; Kusakabe, N.; Kandori, R.; Nakajima, Y.; Nagayama, T.; Nagata, T.; Hough, J.H. (2013-03-01)
      We present results from deep imaging linear and circular polarimetry of the massive star-forming region NGC 6334-V. These observations show high degrees of circular polarization (CP), as much as 22% in the Ks band, in the ...

    • PlanetPol : A very high sensitivity polarimeter 

      Hough, J.H.; Lucas, P.W.; Bailey, J.A.; Tamura, M.; Hirst, E.; Harrison, D.; Bartholomew-Biggs, M. (2006-09-01)
      We have built and used on several occasions an optical broadband stellar polarimeter, PlanetPol, which employs photoelastic modulators and avalanche photodiodes and achieves a photon-noise-limited sensitivity of at least ...

    • Polarimetry at UKIRT 

      Hough, J.H. (Springer Nature, 2013)
      Polarimetry has played an important role at UKIRT, both through visitor instruments and as an option on most facility instruments. A large range of science has been carried out covering galactic and extragalactic astronomy. ...

    • Polarimetry of Stars and Planetary Systems 

      Kolokolova, L.; Hough, J.H.; Levasseur-Regourd, A.-C.; School of Physics, Astronomy and Mathematics; Science & Technology Research Institute; Centre for Astrophysics Research (Cambridge University Press, 2015-05-14)

    • Polarimetry of young stellar objects - III : Circular polarimetry of OMC-1 

      Chrysostomou, A.; Gledhill, T.M.; Ménard, F.; Hough, J.H.; Tamura, M.; Bailey, J. (2000-02-11)
      We present the first imaging circular polarimetry of the Orion Molecular Cloud, OMC-1. The observations, taken in the J, H, K and nbL bands, reveal a complex pattern of circular polarization. Globally, there is a background ...

    • Polarization Diagnostics for Cool Core Cluster Emission Lines 

      Sparks, W.B.; Pringle, J. E.; Carswell, R. F.; Voit, G.M.; Donahue, M.; Cracraft, M.; Meyer, E.T.; Hough, J.H.; Manset, N. (2014-01-01)
      The nature of the interaction between low-excitation gas filaments at ~104 K, seen in optical line emission, and diffuse X-ray emitting coronal gas at ~107 K in the centers of galaxy clusters remains a puzzle. The presence ...

    • Polarized optical scattering signatures from biological materials 

      Martin, William Eugene; Hesse, E.; Hough, J.H.; Sparks, W.B.; Cockell, C.S.; Ulanowski, Z.; Germer, T.A.; Kaye, Paul H. (2010-11)
      The polarization of laser light backscattered from biological samples has been measured over the wavelength range 350-850. nm. Incident circular, linearly polarized, and unpolarized light produces significant spectral ...

    • Remote sensing of chiral signatures on Mars 

      Sparks, W.; Hough, J.H.; Germer, T.A.; Robb, F.; Kolokolova, L. (2012-11-01)
      We describe circular polarization as a remote sensing diagnostic of chiral signatures which may be applied to Mars. The remarkable phenomenon of homochirality provides a unique biosignature which can be amenable to remote ...