Browsing by Title

Now showing items 16944-16963 of 24083

    • Poland's New Capitalism 

      Hardy, Jane (Pluto, 2009)
      Poland was central to the historic changes that took place across Eastern Europe at the end of the Cold War. It is the largest economy in the region, and was at the forefront of opposition to communism, with the rise of ...

    • Polarimetric line profiles for scattering off rotating disks 

      Vink, J.S.; Harries, T.J.; Drew, J.E. (2005)

    • Polarimetric mapping of a new infrared reflection nebula GGD 27 IRS 

      Yamashita, T.; Sato, S.; Nagata, T.; Suzuki, H.; Hough, J.; McLean, I.; Garden, R.; Gatley, I. (1987)
      We report the discovery of an infrared reflection nebula GGD27 IRS, near the optical nebulosity GGD27. It shows a dumbbell-shaped structure with large degrees of polarization, up to 64%, in the K band. From the centrosymmetric ...

    • Polarimetric Models of Circumstellar Discs Including Aggregate Dust Grains 

      Mohan, Mahesh (2016-07-29)
      The work conducted in this thesis examines the nature of circumstellar discs by investigating irradiance and polarization of scattered light. Two circumstellar discs are investigated. Firstly, H-band high contrast imaging ...

    • Polarimetric Observations of 15 Active Galactic Nuclei at High Frequencies: Jet Kinematics from Bimonthly Monitoring with the very Long Baseline Array 

      Marscher, A.P.; Jorstad, S.G.; Lister, M.; Stirling, A.M.; Cawthorne, T.V.; Gear, W.K.; Gomez, J-L.; Stevens, J. A.; Smith, P.S.; Forster, J.R.; Robson, E.I. (2005-10)

    • Polarimetric Observations of 15 AGNs at High Frequencies 

      Jorstad, S.G.; Marscher, A.P.; Stevens, J. A.; Robson, I.; Lister, M.; Stirling, A.M.; Cawthorne, T.V.; Smith, P.S.; Gomez, J-L.; Gabuzda, D.; Gear, W.K. (Astronomical Society of the Pacific, 2005)
      We have obtained total and polarized intensity images of 15 AGNs with the VLBA at 7 mm at 17 epochs from 25/26 March 1998 to 14 April 2001. The VLBA observations are accompanied at many epochs by simultaneous mea- surements ...

    • Polarimetric observations of the quasar 3C-345 

      Mead, A.R.G.; Brand, P.W.J.L.; Hough, J.; Bailey, J. (1988)
      Infrared and optical polarimetric observations of the quasar 3C 345 are presented, which show a decrease in the degree of polarization with frequency previously observed by Smith et al., and interpreted by them as the ...

    • Polarimetry : a powerful diagnostic tool in astronomy 

      Hough, J. (2006)
      Knowledge of the polarization state of radiation provides far more astrophysical information than intensity alone. Polarimetry has played a key role in the development of modern astronomy, providing insight into physical ...

    • Polarimetry and modelling of narrow-line active galaxies 

      Young, S.; Hough, J.; Efstathiou, A.; Wills, B.; Bailey, J.; Axon, D.J. (1996)
      We present optical spectropolarimetry along with optical and infrared broad-band filter polarimetry of selected warm [f(25 μm)/f(60 μm)>=0.3] IRAS galaxies and other known Seyfert 2 galaxies. Broad lines in polarized flux ...

    • Polarimetry and photometry of the new AM Herculis system RE J1844-741 

      Bailey, J.; Ferrario, L.; Wickramasinghe, D.T.; Buckley, D.A.H.; Hough, J. (1995)
      The ROSAT Wide Field Camera extreme-ultraviolet (EUV) source RE J1844-741 was identified with a 16th-magnitude cataclysmic variable with a period of 90 min by O'Donoghue et al. In this paper, we present spectropolarimetry ...

    • Polarimetry and the torus 

      Hough, J.; Young, S.; Efstathiou, A. (1996)
      While the torus plays an obvious role in blocking direct light, and thus increasing the observed polarization from scattering, its role in directly producing polarized flux is less clear. Contributions to the infrared ...

    • 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 developments at the Gemini telescopes 

      Hough, J.; Aitken, D. (2003)

    • Polarimetry for the Gemini telescopes 

      Hough, J.; Aitken, D.; Chrysostomou, A. (1998)
      Polarimeters at optical and near-IR wavelengths are increasingly available as part of facility instruments at major observatories, and are used for a large number of astronomical programs, ranging form nearby star-forming ...

    • Polarimetry for the Gemini telescopes 

      Hough, J.; Aitken, D.; Chrysostomou, A. (Int Soc for Optical Engineering, 1998)
      Polarimeters at optical and near-IR wavelengths are increasingly available as part of facility instruments at major observatories, and are used for a large number of astronomical programs, ranging form nearby star-forming ...

    • Polarimetry in the infrared : what can be learned? 

      Hough, J.; Aitken, D. (2003)

    • Polarimetry of External Galaxies 

      Hough, J. (Astronomical Society of the Pacific, 1996)
      This review presents results to date on the wavelength dependence of interstellar polarization (ISP) in other galaxies. A number of different techniques are discussed, and galaxy types range from those similar to the Milky ...

    • Polarimetry of ST LMi - Discovery of a second accreting pole 

      Peacock, T.; Cropper, M.; Bailey, J.; Hough, J.; Wickramasinghe, D.T. (1992)
      We have obtained simultaneous multiband photometric and polarimetric light curves for ST LMi (CW1103 + 254) in the visible range and the near-infrared on three occasions. These clearly show the presence of previously ...

    • 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 ...