Browsing by Title

Now showing items 20543-20562 of 24089

    • Spectral analysis of the DNA targeting bisalkylaminoanthraquinone DRAQ5 in intact living cells 

      Njoh, Kerenza L.; Patterson, Laurence H.; Zloh, Mire; Wiltshire, Marie; Fisher, Janet; Chappell, Sally; Ameer-Beg, Simon; Bai, Yanhong; Matthews, Daniel; Errington, Rachel J.; Smith, Paul J. (2006-08)
      We report on the potential DNA binding modes and spectral characteristics of the cell-permeant far red fluorescent DNA dye, DRAQ5, in solution and bound within intact cells. Our aim was to determine the constraints for its ...

    • Spectral analysis of water vapour in cool stars 

      Jones, H.R.A.; Pavlenko, Y.; Viti, S.; Tennyson, J. (2002-03)

    • Spectral and Photometric evolution of young stellar poplations: The impact of gaseous emission at various metallicites 

      Anders, P.; Fritze, U. (2003)

    • The Spectral and Temporal Properties of Transient Sources in Early-type Galaxies 

      Brassington, Nicola; Fabbiano, G.; Zezas, A.; Kim, D.-W.; Fragos, T.; Kundu, A.; King, A.R.; Pellegrini, S.; Trinchieri, G.; Zepf, S.; Wright, N.J. (2012-08-20)
      We report the spectral and temporal variability properties of 18 candidate transient (TC) and potential transient (PTC) sources detected in deep multi-epoch Chandra observation of the nearby elliptical galaxies, NGC3379, ...

    • Spectral classification of photometrically selected AGB candidates in NGC 6822 

      Sibbons, L. F.; Ryan, Sean G.; Napiwotzki, Ralf; Thompson, G. P. (2015-02-02)
      Context. The ratio of C- and M-type asymptotic giant branch (AGB) stars is commonly used to estimate the metallicity of extragalactic populations. Sources in the AGB population must therefore be accurately classified as ...

    • Spectral energy distribution and radio halo of NGC253 at low radio frequencies 

      Kapinska, A. D.; Staveley-Smith, L.; Crocker, R.; Meurer, G. R.; Bhandari, S.; Hurley-Walker, N.; Offringa, A. R.; Hanish, D. J.; Seymour, N.; Ekers, R. D.; Bell, M. E.; Callingham, J. R.; Dwarakanath, K. S.; For, B. -Q.; Gaensler, B. M.; Hancock, P. J.; Hindson, Luke; Johnston-Hollitt, M.; Lenc, E.; McKinley, B.; Morgan, J.; Procopio, P.; Wayth, R. B.; Wu, C.; Zheng, Q.; Barry, N.; Beardsley, A. P.; Bowman, J. D.; Briggs, F.; Carroll, P.; Dillon, J. S.; Ewall-Wice, A.; Feng, L.; Greenhill, L. J.; Hazelton, B. J.; Hewitt, J. N.; Jacobs, D. J.; Kim, H. -S.; Kittiwisit, P.; Line, J.; Loeb, A.; Mitchell, D. A.; Morales, M. F.; Neben, A. R.; Paul, S.; Pindor, B.; Pober, J. C.; Riding, J.; Sethi, S. K.; Shankar, N. Udaya; Subrahmanyan, R.; Sullivan, I. S.; Tegmark, M.; Thyagarajan, N.; Tingay, S. J.; Trott, C. M.; Webster, R. L.; Wyithe, S. B. (2017-03-27)
      We present new radio continuum observations of NGC253 from the Murchison Widefield Array at frequencies between 76 and 227 MHz. We model the broadband radio spectral energy distribution for the total flux density of NGC253 ...

    • Spectral energy distribution for GJ406 

      Pavlenko, Y.; Jones, H.R.A.; Lyubchik, Y.; Tennyson, J.; Pinfield, D.J. (2006)

    • The Spectral Energy Distribution of Powerful Starburst Galaxies I : Modelling the Radio Continuum 

      Galvin, T J; Seymour, N.; Marvil, J.; Filipovic, M D; Tothill, N.F.H.; McDermid, Richard M.; Hurley-Walker, N.; Hancock, P. J.; Callingham, J. R.; Cook, R H; Norris, Ray P.; Bell, M E; Dwarakanath, K. S.; For, B. -Q.; Gaensler, B. M.; Hindson, L; Johnston-Hollitt, M.; Kapińska, A. D.; Lenc, E.; McKinley, B.; Morgan, J; Offringa, A. R.; Procopio, P.; Staveley-Smith, L.; Wayth, R. B.; Wu, C.; Zheng, Q. (2018-02-01)
      We have acquired radio-continuum data between 70MHz and 48 GHz for a sample of 19 southern starburst galaxies at moderate redshifts (0.067 < z < 0.227) with the aim of separating synchrotron and free-free emission components. ...

    • Spectral evidence for dust in late-type M dwarfs 

      Jones, H.R.A.; Tsuji, Takashi (1997-02-13)
      We have found a dramatic change in the spectra of late-type M dwarfs at wavelengths shorter than 0.75 microns. Comparisons with synthetic spectra illustrate that this change is well explained by the presence of dust. It ...

    • The Spectral Evolution of High-Frequency Radio Outbursts in the Blazar PKS:0420-014 

      Stevens, Jason; Litchfield, S. J.; Robson, E. I.; Gear, W. K.; Terasranta, H.; Tornikoski, M.; Valtaoja, E. (1995-08-01)
      Multifrequency monitoring data between 375 and 22 GHz are used to investigate spectral evolution of radio outbursts in the blazar 0420-014. It is shown that, after subtraction of the underlying `quiescent' emission, the ...

    • Spectral Modulation, or Ripple, in Retardation Plates for Linear and Circular Polarization 

      Aitken, D.; Hough, J. (2001)

    • Spectral Monitoring of HS 0209+0832 a DAB White Dwarf in the DB Gap 

      Edelmann, H.; Heber, U.; Napiwotzki, R. (Astronomical Society of the Pacific, 2001)
      We report results of a spectral monitoring campagne of the DAB white dwarf HS 0209+0832, for which helium line profile variations were reported earlier (Heber et al. 1997). This finding is confirmed by our discovery of a ...

    • Spectral Parameters for Scattering Amplitudes in N=4 Super Yang-Mills Theory 

      Ferro, Livia; Lukowski, Tomasz; Meneghelli, Carlo; Plefka, Jan; Staudacher, Matthias (2014-01-17)
      Planar N=4 Super Yang-Mills theory appears to be a quantum integrable four-dimensional conformal theory. This has been used to find equations believed to describe its exact spectrum of anomalous dimensions. Integrability ...

    • Spectral properties of X-ray binaries in Centaurus A 

      Burke, M.J.; Raychaudhury, S.; Kraft, R.P.; Forman, W.R.; Jones, C.; Murray, S.S.; Birkinshaw, M.; Evans, D.A.; Jordán, A.; Worrall, D.M.; Maccarone, T. J.; Croston, J.H.; Brassington, Nicola; Hardcastle, M.J.; Goodger, J.L.; Kainulainen, J.; Woodley, K.A.; Sivakoff, G.R.; Gilfanov, M.; Zhang, Z.; Sarazin, C.L.; Voss, R. (2013-04-01)
      We present a spectral investigation of X-ray binaries (XBs) in NGC 5128 (Cen A), using six 100 ks Chandra observations taken over two months in 2007. We divide our sample into thermally and non-thermally dominated states ...

    • The spectral structure and energetics of powerful radio sources 

      Harwood, J. J.; Hardcastle, M J.; Croston, J. H.; Stroe, A.; Morganti, R.; Orru, E. (2014-04-29)
      Determining the energy spectrum of an electron population can give key insights into the underlying physics of a radio source; however, the lack of high resolution, broad-bandwidth observations has left many ambiguities ...

    • Spectral Structure In Fr II Radio Galaxies And Jets 

      Treichel, K.; Rudnick, L.; Hardcastle, M.J.; Leahy, J.P. (University of Chicago Press/ American Astronomical Society, 2001-11)
      Using spectral tomography to separate overlapping spectral features in a sample of FR II radio galaxies, we Ðnd a variety of spatial/spectral features that are not easily described in the context of current models. In ...

    • Spectral surface albedo over Morocco and its impact on radiative forcing of Saharan dust 

      Bierwirth, Eike; Wendisch, Manfred; Ehrlich, Andre; Heese, Birgit; Tesche, Matthias; Althausen, Dietrich; Schladitz, Alexander; Mueller, D.; Otto, Sebastian; Trautmann, Thomas; Dinter, Tilman; von Hoyningen-Huene, Wolfgang; Kahn, Ralph (2009-02)
      In May-June 2006, airborne and ground-based solar (0.3-2.2 mu m) and thermal infrared (4-42 mu m) radiation measurements have been performed in Morocco within the Saharan Mineral Dust Experiment (SAMUM). Upwelling and ...

    • Spectral types and masses of white dwarfs in globular clusters 

      Moehler, S.; Koester, D.; Zoccali, M.; Ferraro, F.R.; Heber, U.; Napiwotzki, R.; Renzini, A. (2004)

    • The spectral–temporal properties of the prompt pulses and rapid decay phase of gamma-ray bursts 

      Willingale, R.; Genet, F.; Granot, J.; O'Brien, P.T. (2010)
      The prompt emission from gamma-ray burst is the brightest electromagnetic emission known, yet its origin is not understood. The flux density of individual prompt pulses of a GRB can be represented by an analytical expression ...

    • A spectro-astrometric study of southern pre-main sequence stars - Binaries, outflows, and disc structure down to AU scales.-- 

      Takami, M.; Bailey, J.; Chrysostomou, A. (2003-01)