Now showing items 326-345 of 724

  • Henghes, Ben; Lahav, Ofer; Gerdes, David W.; Lin, H. W.; Morgan, R.; Abbott, T. M. C.; Aguena, M.; Allam, S.; Annis, J.; Avila, S.; Bertin, E.; Brooks, D.; Burke, D. L.; Carnero Rosell, A.; Carrasco Kind, M.; Carretero, J.; Conselice, C.; Costanzi, M.; Da Costa, L. N.; De Vicente, J.; Desai, S.; Diehl, H. T.; Doel, P.; Everett, S.; Ferrero, Ismael; Frieman, J.; García-Bellido, Juan; Gaztanaga, E.; Gruen, D.; Gruendl, Robert A.; Gschwend, J.; Gutierrez, G.; Hartley, W. G.; Hinton, S. R.; Honscheid, K.; Hoyle, B.; James, D. J.; Kuehn, K.; Kuropatkin, N.; Marshall, Jennifer L.; Melchior, P.; Menanteau, F.; Miquel, R.; Ogando, R. L. C.; Palmese, Antonella; Paz-Chinchón, Francisco; Plazas, Andrés A.; Romer, A. K.; Sánchez, C.; Sanchez, E.; Scarpine, V.; Schubnell, M.; Serrano, S.; Smith, M.; Soares-Santos, M; Suchyta, E.; Tarle, G.; To, C.; Wilkinson, R. D. (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
    In this paper we investigate how implementing machine learning could improve the efficiency of the search for Trans-Neptunian Objects (TNOs) within Dark Energy Survey (DES) data when used alongside orbit fitting. The ...
  • Rigby, J. R.; Bayliss, M. B.; Sharon, K.; Gladders, M. D.; Chisholm, J.; Dahle, Håkon; Johnson, Traci; Paterno-Mahler, Rachel; Wuyts, E; Kelson, D. D. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    We introduce Project MegaSaura: the Magellan Evolution of Galaxies Spectroscopic and Ultraviolet Reference Atlas. MegaSaura comprises medium-resolution, rest-frame ultraviolet spectroscopy of N = 15 bright gravitationally ...
  • Rigby, J. R.; Bayliss, M. B.; Chisholm, J.; Bordoloi, Rongmon; Sharon, K.; Gladders, M. D.; Johnson, T.; Paterno-Mahler, Rachel; Wuyts, E; Dahle, Håkon; Acharyya, A. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    We stack the rest-frame ultraviolet spectra of N = 14 highly magnified gravitationally lensed galaxies at redshifts $1.6\lt z\lt 3.6$. The resulting new composite spans $900\lt {\lambda }_{\mathrm{rest}}\lt 3000$ Å, with ...
  • Joshi, Jayant; de la Cruz Rodriguez, Jaime (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    Context: Umbral flashes (UF) and running penumbral waves (RPWs) in sunspot chromospheres leave a dramatic imprint in the intensity profile of the Ca II 8542 Å line. Recent studies have focussed on also explaining the ...
  • Garcia, Odd Erik; Leer, Egil; Pecseli, Hans; Trulsen, Jan Karsten (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
    Analytical models are presented for currents along vertical magnetic field lines due to slow bulk electron motion in plasmas subject to a gravitational force. It is demonstrated that a general feature of this problem is a ...
  • Jafarzadeh, Shahin; Rouppe, Van Der Voort Luc; de la Cruz Rodriguez, Jaime (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
    Rapid magnetic up fl ows in the quiet-Sun photosphere were recently uncovered from both SUNRISE / IMaX and Hinode / SOT observations. Here, we study magnetic up flow events ( MUEs ) from high-quality, high- ( spatial, ...
  • Allahyari, Alireza; Khodali, Mohsen; Vagnozzi, Sunny; Mota, David (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
    Non-linear electrodynamics (NLED) theories are well-motivated extensions of QED in the strong field regime, and have long been studied in the search for regular black hole (BH) solutions. We consider two well-studied and ...
  • Gilchrist-Millar, Caitlin A.; Jess, David B.; Grant, Samuel D. T.; Keys, Peter H.; Beck, Christian; Jafarzadeh, Shahin; Riedl, Julia M.; Van Doorsselaere, Tom; Ruiz Cobo, Basilio (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
    The suitability of solar pores as magnetic wave guides has been a key topic of discussion in recent years. Here, we present observational evidence of propagating magnetohydrodynamic wave activity in a group of five ...
  • Houston, Scott J.; Jess, David B.; Keppens, Rony; Stangalini, Marco; Keys, Peter H.; Grant, Samuel D. T.; Jafarzadeh, Shahin; McFetridge, L. M.; Murabito, Mariarita; Ermolli, I.; Giorgi, F. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
  • Howson, T. A.; de Moortel, Ineke; Reid, J.; Hood, A. W. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Aims. We investigate the propagation of transverse magnetohydrodynamic (MHD) wave fronts through a coronal plasma containing a braided magnetic field. Methods. We performed a series of three dimensional MHD simulations ...
  • Vanzella, E.; Castellano, M.; Meneghetti, M.; Mercurio, A.; Caminha, G. B.; Cupani, G.; Calura, F.; Christensen, L.; Merlin, E.; Rosati, P.; Gronke, Max Balthasar; Dijkstra, Mark; Mignoli, M.; Gilli, R.; De Barros, S.; Caputi, K.; Grillo, C.; Balestra, I.; Cristiani, S.; Nonino, M.; Giallongo, E.; Grazian, A.; Pentericci, L.; Fontana, A.; Comastri, A.; Vignali, C.; Zamorani, G.; Brusa, M.; Bergamini, P.; Tozzi, P. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    © 2017. The American Astronomical Society. All rights reserved.
  • Aviles, Alejandro; Koyama, Kazuya; Cervantes-Cota, Jorge L; Winther, Hans Arnold; Li, Baojiu (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
    We develop perturbation theory approaches to model the marked correlation function constructed to up-weight low density regions of the Universe, which might help distinguish modified gravity models from the standard cosmology ...
  • Del Popolo, Antonino; Pace, Francesco; Mota, David (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    We derive the mass-temperature relation using an improved top-hat model and a continuous formation model which takes into account the effects of the ordered angular momentum acquired through tidal-torque interaction between ...
  • Aarflot, Haakon (Master thesis / Masteroppgave, 2008)
  • Grindstad, Maren Klemetsen (Master thesis / Masteroppgave, 2010)
    Neutrino cosmology is a very interesting field of research, where properties of some of the smallest constituents of the universe are probed by the very largest structures of the universe; large scale structures of the ...
  • Sand, Odd Petter (Master thesis / Masteroppgave, 2016)
    Spherical collapse is a crude, but useful toy model for structure formation in an expanding universe. Previous works have looked at this model in ΛCDM with massive neutrinos, where the primary findings were that massive ...
  • Næss, Sigurd Kirkevold (Doctoral thesis / Doktoravhandling, 2012)
  • Mas Ribas, Lluis; Miralda-Escude, Jordi; Perez-Rafols, Ignasi; Arinyo-i-Prats, Andreu; Noterdaeme, Pasquier; Petitjean, Patrick; Schneider, Donald P.; York, Donald G.; Ge, Jian (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    We study the mean absorption spectrum of the Damped Lyα (DLA) population at z ~ 2.6 by stacking normalized, rest-frame-shifted spectra of ~27,000 DLA systems from the DR12 of the Baryon Oscillation Spectroscopic Survey ...
  • Wu, W. L. Kimmy; Mocanu, Laura-Monica; Ade, Peter A.R.; Anderson, A. J.; Austermann, Jason E.; Avva, J. S.; Beall, James A.; Bender, A. N.; Benson, Bradford A.; Bianchini, F.; Bleem, Lindsey E.; Carlstrom, John E.; Chang, C. L.; Chiang, H. C.; Citron, R.; Corbett Moran, C.; Crawford, Thomas M.; Crites, Abigail T.; de Haan, T; Dobbs, Matthew Adam; Everett, W.; Gallicchio, J.; George, Elizabeth M.; Gilbert, A.; Gupta, N.; Halverson, Nils W.; Harrington, N.; Henning, Jason W.; Hilton, Gene C.; Holder, Gilbert P.; Holzapfel, William Laird; Hou, Z.; Hrubes, J. Dana; Huang, N.; Hubmayr, Johannes; Irwin, Kent D.; Knox, L.; Lee, A. T.; Li, D.; Lowitz, A.; Manzotti, A; McMahon, J. J.; Meyer, S. S.; Millea, Marius; Montgomery, J.; Nadolski, A.; Natoli, T.; Nibarger, J. P.; Noble, G. I.; Novosad, Valentine; Omori, Y.; Padin, S.; Patil, S.; Pryke, C.; Reichardt, Christian L.; Ruhl, J. E.; Saliwanchik, B. R.; Sayre, James T.; Schaffer, Kathryn K.; Sievers, C.; Simard, G.; Smecher, G.; Stark, Anthony A.; Story, Kyle T.; Tucker, C.; Vanderlinde, K.; Veach, T.; Vieira, Joaquin D.; Wang, G.; Whitehorn, N; Yefremenko, V. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    We present a measurement of the cosmic microwave background lensing potential using 500 deg2 of 150 GHz data from the SPTpol receiver on the South Pole Telescope. The lensing potential is reconstructed with signal-to-noise ...
  • Arinyo-i-Prats, Andreu; Mas Ribas, Lluis; Miralda-Escude, Jordi; Perez-Rafols, Ignasi; Noterdaeme, Pasquier (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    The bias factor of damped Ly α (DLAs) systems, derived from the cross-correlation with the Ly α forest in absorption spectra of the Baryon Oscillation Spectroscopic Survey of SDSS-III, has been used to infer the characteristic ...