Browsing University of Hertfordshire by Title

Now showing items 11476-11495 of 24309

    • Infrared polarimetry of the nucleus of Centaurus A - The nearest blazar? 

      Bailey, J.; Sparks, W.; Hough, J.; Axon, D.J. (1986)
      As one of the nearest examples of an active galaxy, NGC5128 (Centaurus A) has been studied in detail over a wide range of wavelengths. The nucleus of the galaxy is seen clearly in the X-ray, radio and infrared, but is ...

    • Infrared polarimetry of the reflection nebula near L 1551 IRS 5 

      Nagata, T.; Yamashita, T.; Sato, S.; Suzuki, H.; Hough, J.; Garden, R.; Gatley, I. (1986)
      The K-band polarization has been measured in the region extending 30 arcsec to the SW of L 1551 IRS 5. The degree of polarization is exceptionally high, reaching ≡67 per cent. The large polarizations and the azimuthal ...

    • Infrared polarimetry of the southern massive star-forming region G333.6-0.2 

      Fujiyoshi, T.; Smith, C.H.; Wright, C.M.; Moore, T.J.T.; Aitken, D.; Roche, P.F. (2001)
      We present 8-13μm spectropolarimetry, and 12- and 2-μm imaging polarimetry of the southern massive star-forming region G333.6−0.2. Spectro-polarimetry measurements show that the polarization observed towards the nebula ...

    • Infrared polarization in OMC-1 - Discovery of a molecular hydrogen reflection nebula 

      Hough, J.; Axon, D.J.; Burton, M.; Gatley, I.; Sato, S.; Bailey, J.; McCaughrean, M.J.; McLean, I.; Nagata, T.; Allen, D.; Garden, R.; Hasegawa, T.; Hayashi, M.; Kaifu, N.; Morimoto, M.; Walther, D. (1986)
      The polarization of the broadband continuum at K has been mapped in the core of the OMC-1 with high spatial resolution, and with lower resolution in a more extensive surrounding area. In addition, the first detailed ...

    • The infrared properties of sources matched in the WISE all-sky and Herschel ATLAS surveys 

      Bond, Nicholas A.; Benford, Dominic J.; Gardner, Jonathan P.; Amblard, Alexandre; Fleuren, Simone; Blain, Andrew W.; Dunne, Loretta; Smith, Daniel; Maddox, Steve J.; Hoyos, Carlos; Baes, Maarten; Bonfield, David; Bourne, Nathan; Bridge, Carrie; Buttiglione, Sara; Cava, Antonio; Clements, David; Cooray, Asantha; Dariush, Ali; de Zotti, Gianfranco; Driver, Simon; Dye, Simon; Eales, Steve; Eisenhardt, Peter; Hopwood, Rosalind; Ibar, Edo; Ivison, Rob J.; Jarvis, M.J.; Kelvin, Lee; Robotham, Aaron S. G.; Temi, Pasquale; Thompson, Mark; Tsai, Chao-Wei; van der Werf, Paul; Wright, Edward L.; Wu, Jingwen; Yan, Lin (2012-05-01)
      We describe the infrared properties of sources detected over similar to 36 deg(2) of sky in the GAMA 15 hr equatorial field, using data from both the Herschel Astrophysical Terahertz Large-Area Survey (H-ATLAS) and Wide-field ...

    • Infrared reflection nebula in W75N 

      Yamashita, T.; Sato, S.; Tamura, M.; Suzuki, H.; Gatley, I.; Hough, J.; Mountain, C.M.; Moore, T.J.T. (1988)
      A new infrared reflection nebula is identified in the W75N region. The K-band polarization map shows a centrosymmetric pattern of the vectors extending over a region 2 arcmin in size, with large values of degrees of ...

    • An infrared ring around the magnetar SGR 1900+14 

      Wachter, S.; Ramirez-Ruiz, E.; Dwarkadas, V.V.; Kouveliotou, C.; Granot, J.; Patel, S.K.; Figer, D. (2008)

    • An Infrared Spectral Sequence for M Dwarfs 

      Jones, H.R.A.; Longmore, A.J.; Jameson, R.F. (Astronomical Society of the Pacific, 1994)
      We present a spectral sequence from 1-2.5 um of M dwarfs from GL411 which is classified as M2V to the best brown dwarf candidate GD165B (M10V). This sequence shows the progressive importance of water vapour in the stmospheres ...

    • Infrared spectropolarimetric observations of BNKL : the grain alignment mechanism 

      Aitken, D.; Bailey, J.; Roche, P.F.; Hough, J. (1985)
      Spectropolarimetric observations between 8 - 13 μm of BN, IRc 2, 3, 4 and a further region in the Orion infrared complex BNKL are presented. Apart from IRc 2, all show evidence for absorption by aligned grains and have ...

    • Infrared spectropolarimetry of AFGL 2591 - Evidence for an annealed grain component 

      Aitken, D.; Roche, P.F.; Smith, C.H.; James, S.D.; Hough, J. (1988)

    • Infrared spectropolarimetry of Seyfert galaxy NGC1068 

      Aitken, D.; Bailey, J.; Briggs, G.; Hough, J.; Roche, P.F. (1984)
      Although most of the luminosity of Seyfert galaxy nuclei is emitted in the IR, the relative amounts of thermal dust and non-thermal emission are uncertain. Seyfert galaxies generally have smooth and featureless IR spectra, ...

    • Infrared spectropolarimetry of the galactic-center-magnetic alignment in the discrete sources 

      Aitken, D.; Roche, P.F.; Bailey, J.; Briggs, J.P.; Hough, J.; Thomas, J.A. (1986)
      The results of 8-13 micron spectropolarimetric observations of Galactic Center sources are presented. All the sources show interstellar polarization due to absorption by aligned silicate grains, and these grains appear to ...

    • Infrared spectroscopy and analysis of brown dwarf and planetary mass objects in the Orion nebula cluster 

      Weights, D.; Lucas, P.W.; Roche, P.F.; Pinfield, D.J.; Riddick, F. (2009)
      We present near-infrared long-slit and multislit spectra of low-mass brown dwarf candidates in the Orion nebula cluster. The long-slit data were observed in the H and K bands using NIRI on the Gemini-North Telescope. The ...

    • Infrared spectroscopy of eruptive variable protostars from VVV 

      Peña, C. Contreras; Lucas, P. W.; Kurtev, R.; Minniti, D.; Garatti, A. Caratti o; Marocco, F.; Thompson, M. A.; Froebrich, D.; Kumar, N.; Stimson, W.; Molina, C. Navarro; Borissova, J.; Gledhill, T.; Terzi, R. (2017-03-01)
      In a companion work (Paper I) we detected a large population of highly variable Young Stellar Objects (YSOs) in the Vista Variables in the Via Lactea (VVV) survey, typically with class I or flat spectrum spectral energy ...

    • Infrared Spectroscopy of Substellar Objects in Orion 

      Lucas, P.W.; Roche, N.D.; Allard, E.L.; Hauschildt, P. (2001)

    • An infrared study of local galaxy mergers 

      Carpineti, Alfredo; Kaviraj, Sugata; Hyde, Ashley K.; Clements, David L.; Schawinski, Kevin; Darg, Daniel; Lintott, Chris J. (2015-05-13)
      We combine a large, homogeneous sample of $\sim$3000 local mergers with the Imperial IRAS Faint Source Redshift Catalogue (IIFSCz), to perform a blind far-infrared (FIR) study of the local merger population. The IRAS-detected ...

    • An infrared-radio simulation of the extragalactic sky : From the Square Kilometre Array to Herschel 

      Wilman, R. J.; Jarvis, M.J.; Mauch, T.; Rawlings, S.; Hickey, Samantha (2010-06-11)
      To exploit synergies between the Herschel Space Observatory and next generation radio facilities, we have extended the semi-empirical extragalactic radio continuum simulation of Wilman et al. to the mid- and far-infrared. ...

    • Infrastructure projects’ assessment through sdg targets: : Towards a comprehensive framework 

      Mansell, Paul; Van Rooyen, Deney; Philbin, Simon; Sabini, Luca (2021-05-01)
      The achievement of the United Nations’ Sustainable Development Goals (SDGs) is of paramount importance “for the peace and prosperity for people and the planet, now and in the future” (United Nations, 2015; Økland, 2015). ...

    • The ingestion of protein with a maltodextrin and fructose beverage on substrate utilisation and exercise performance 

      Tarpey, Michael; Roberts, Justin; Kass, Lindsy; Tarpey, Richard; Roberts, Michael (2013-12)
      The study investigated the ingestion of maltodextrin, fructose and protein on exogenous carbohydrate oxidation (CHOEXO) and exercise performance. Seven trained cyclists/triathletes (VO2max: 59.20 ± 9.00 ml •kg-1•min-1) ...

    • Ingredients for the specification of mixed-criticality real-time systems 

      Kirner, Raimund (Institute of Electrical and Electronics Engineers (IEEE), 2014-09-15)
      Models for real-time computing are available with different timing requirements. With the ongoing trend towards integration of services of different degrees of timing strictness on one single platform, there is a need to ...