Browsing Research Articles (Physics) by Title

Now showing items 392-411 of 510

    • Probing the imprint of interacting dark energy on very large scales 

      Duniya, Didam, G. A.; Bertacca, Daniele; Maartens, Roy (American Physical Society, 2015)
      The observed galaxy power spectrum acquires relativistic corrections from light-cone effects, and these corrections grow on very large scales. Future galaxy surveys in optical, infrared and radio bands will probe increasingly ...

    • Probing the nature of the conjectured low-spin wobbling bands in atomic nuclei 

      Guo, S.; Zhou, X.H.; Petrache, C.M.; Gan, Z.G.; Zhang, Y.H. (Elsevier, 2022)
      The precession of an atomic nucleus can be approximately described as wobbling motion, arising from the coupling of a rotation and a harmonic vibration. Recently, a number of wobbling bands were reported at low spin, which ...

    • Promoting physics and development in Africa 

      Zingu, Edmund (American Institute of Physics, 2004)
      To excel in physics research in Africa is to conquer Mount Everest without the aid of additional oxygen. In a continent that lacks the infrastructure of research laboratories, technical support, and so forth, relatively ...

    • Properties of CVSO 30 from TESS measurements: probably a binary T Tauri star with complex light curves and no obvious planets 

      Koen, C. (Oxford University Press, 2020)
      ‘Transiting Exoplanet Survey Satellite’ (TESS) photometry of CVSO 30 spanned 21.8 d, with a single large gap of 1.1 d. This allows alias-free determination of the two periodicities in the data. It is confirmed that both ...

    • Properties of submillimeter galaxies in the CANDELS GOODS-south field 

      Wilklind, Tommy; Conselice, Christopher J.; Dave, Romeel (American Physical Society, 2014)
      We derive physical properties of 10 submillimeter galaxies located in the CANDELS coverage of the GOODS-S field. The galaxies were first identified as submillimeter sources with the LABOCA bolometer and subsequently targeted ...

    • Properties of Type Ia supernovae inside rich galaxy clusters 

      Xavier, Henrique S.; Gupta, Ravi R.; Smith, Mathew; Sako, Masao; D’Andrea, Chris B.; Frieman, Joshua A.; Galbany, Lluis; Garnavich, Peter M.; Marriner, John; Nichol, Robert C.; Olmstead, Matthew D.; Schneider, Donald P. (Oxford University Press, 2013)
      We used the Gaussian Mixture Brightest Cluster Galaxy catalogue and Sloan Digital Sky Survey-II supernovae data with redshifts measured by the Baryon Oscillation Spectroscopic Survey to identify 48 Type Ia supernovae ...

    • Prospects for cosmic magnification measurements using H I intensity mapping 

      Witzemann, Amadeus; Pourtsidou, Alkistis; Santos, Mario G. (Oxford University Press, 2020)
      We investigate the prospects of measuring the cosmic magnification effect by cross-correlating neutral hydrogen intensity mapping (H I IM) maps with background optical galaxies. We forecast the signal-to-noise ratio for ...

    • PSRJ1910–5959A: A rare gravitational laboratory for testing white dwarf models 

      Corongiu, A; Venkatraman, Krishnan V; Freire, P C C; Kramer, M; Serylak, M (EDP Sciences, 2023)
      Context. PSR J1910-5959A is a binary millisecond pulsar in a 0.837 day circular orbit around a helium white dwarf (HeWD) companion. The position of this pulsar is 6.3 arcmin (∼74 core radii) away from the optical centre ...

    • Pulsar scintillation studies with LOFAR I. The census 

      Wu, Ziwei; Verbiest, Joris P. W.; Serylak, Maciej (Hans Publishers, 2022)
      Interstellar scintillation (ISS) of pulsar emission can be used both as a probe of the ionized interstellar medium (IISM) and cause corruptions in pulsar timing experiments. Of particular interest are so-called scintillation ...

    • Pulsars with NenuFAR: Backend and pipelines 

      Bondonneau, L.; Theureau, G.; Cognard, I.; Brionne, M. (EDP Sciences, 2021)
      Context. NenuFAR (New extension in Nançay upgrading LOFAR) is a new radio telescope developed and built on the site of the Nançay Radio Observatory. It is designed to observe the largely unexplored frequency window from ...

    • Pulsations and eclipse-time analysis of HWVir 

      Baran, A. S.; Østensen, R. H.; Telting, J. H.; Vos, J.; Kilkenny, D.; Vuckovic, M.; Reed, M. D.; Silvotti, R.; Jeffery, C. S.; Parsons, S. G.; V. S. Dhillon, V. S.; Marsh, T. R. (Oxford University Press, 2018)
      We analysed recent K2 data of the short-period eclipsing binary systemHWVir,which consists of a hot subdwarf-B type primary with an M-dwarf companion.We determined the mid-times of eclipses, calculated O–C diagrams, and ...

    • The Q/U imaging experiment instrument 

      Biscoff, C.; Brizius, A.; Zwart, J.; Buder, I.; Chinone, Y.; Cleary, K.; Dumoulin, R.N.; Kusaka, A.; Monsalve, R.; Naess, S.K.; Newburgh, L.B.; Nixon, G.; Reeves, R.; Smith, K.M.; Vanderlinde, K.; Wehus, I.K.; Bogdan, M.; Bustos, R.; Church, S.E.; Davis, Robert; Dickenson, C.; Eriksen, H.K.; Gaier, T.; Gundersen, J.O.; Hasegawa, M.; Hazumi, M.; Holler, C.; Huffenberger, K.M.; Imbriale, W.A.; Ishidoshiro, K.; Jones, M.E.; Kangaslahti, P.; Kapner, D.J.; Lawrence, C.R.; Leitch, E.M.; Limon, M.; McMahon, J.J.; Miller, A.D.; Nagai, M.; Nguyen, H.; Pearson, T.J.; Piccirillo, L.; Radford, S.J.E.; Readhead, A.C.S.; Richards, J.L.; Samtleben, D.; Seiffert, M.; Shepherd, M.C.; Staggs, S.T.; Tajima, O.; Thompson, K.L.; Williamson, R.; Winstein, B.; Wollack, E.J. (The American Astronomical Society, 2013)
      The Q/U Imaging ExperimenT (QUIET) is designed to measure polarization in the cosmic microwave background, targeting the imprint of inflationary gravitational waves at large angular scales(∼1◦). Between 2008 October and ...

    • Quadrupole and octupole collectivity in the semi-magic nucleus 80206Hg126 

      Morrison, L. N.; Hadynska, K.; O'Neill, George G. (Elsevier, 2023)
      The first low-energy Coulomb-excitation measurement of the radioactive, semi-magic, two proton-hole nucleus 206Hg, was performed at CERN's recently-commissioned HIE-ISOLDE facility. Two γ rays depopulating low-lying states ...

    • Qualitatively different ways of unpacking visual representations when teaching intermolecular forces in upper secondary school 

      Patron, Emelie; Linder, Cedric; Wikman, Susanne (Wiley, 2021)
      Since visual representations play a particularly important role in the teaching and learning of chemistry, the ex-ploration described in this article focuses on them. This is an explorative study of the qualitatively ...

    • Quantifying and incentivizing exploration of reputable sources for argument formation in an online discussion forum 

      Square, Lynndle; van der Heyde, V.; Smith, D. (Academic Conferences and Publishing International Limited, 2021)
      Nuclearpowerformspartofthefirst-yearphysicsundergraduatecourseworkinthe extended curriculum program at the University of the Western Cape. This investigation intendstoassiststudentsinmasteringtheirunderstandingof ...

    • A quantitative in-depth analysis of the prototype sdB+BD system SDSS J08205+0008 revisited in the Gaia era 

      Kilkenny, D; Schaffenroth, V; Casewell, S.L (Oxford University Press, 2021)
      Subdwarf B stars are core-helium-burning stars located on the extreme horizontal branch (EHB). Extensive mass loss on the red giant branch is necessary to form them. It has been proposed that substellar companions could ...

    • Quantum dot-sensitised estrogen receptor-α-based biosensor for 17β-estradiol 

      Jijana, Abongile N.; Feleni, Usisipho; Ndangili, Peter M.; Bilibana, Mawethu; Ajayi, Rachel F (MDPI, 2023)
      : 17β-estradiol (E2) is an important natural female hormone that is also classified as an estrogenic endocrine-disrupting compound (e-EDC). It is, however, known to cause more damaging health effects compared to other ...

    • Quijote-png: Quasi-maximum likelihood estimation of primordial non-gaussianity in the nonlinear dark matter density field 

      Jung, Gabriel; Karagiannis, Dionysios; Liguori, Michele (American Astronomical Society, 2022)
      Future large-scale structure surveys are expected to improve current bounds on primordial non-Gaussianity (PNG), with a significant impact on our understanding of early universe physics. The level of such improvements ...

    • Quijote-png: Simulations of primordial non-gaussianity and the information content of the matter field power spectrum and bispectrum 

      Coulton, William R; Villaescusa-Navarro, Francisco; Karagiannis, Dionysios (IOP Publishing, 2023)
      Primordial non-Gaussianity (PNG) is one of the most powerful probes of the early universe, and measurements of the large-scale structure of the universe have the potential to transform our understanding of this area. ...

    • Quijote-png: The information content of the halo power spectrum and bispectrum 

      Coulton, William R; Villaescusa-Navarro, Francisco; Karagiannis, Dionysios (IOP Publishing, 2023)
      We investigate how much can be learnt about four types of primordial non-Gaussianity (PNG) from small-scale measurements of the halo field. Using the QUIJOTE-PNG simulations, we quantify the information content accessible ...