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Browsing Research and Publications - Department of Physics & Astronomy by Title

Now showing items 489-508 of 853

Natural Realizations of the Seesaw Mechanism in Miniwarped Minimal SO(10)

Okada, Nobuchika (2007-07-19)

The minimal supersymmetric SO(10) grand unified theory (GUT) models with 10, 126, and 210 Higgs and only renormalizable couplings have been shown to provide a simple way to understand the neutrino mixings as well as the ...
The Nature of Optical Features in the Inner Region of the 3C 48 Host Galaxy

Stockton, Alan; Canalizo, Cabriela; Fu, Hai; Keel, William C. (2007-04-10)
Near-infrared Atlas of S0-Sa Galaxies (NIRS0S)

Buta, Ronald (2011-12-11)

We present an atlas of K_s-band images of 206 early-type galaxies, including 160 S0-S0/a galaxies, 12 ellipticals and 33 Sa galaxies (+ one later type). The majority of the atlas galaxies belong to a magnitude-limited (m_B ...
Near-Infrared Imaging of a z = 6.42 Quasar Host Galaxy with the Hubble Space Telescope Wide Field Camera 3

Mechtley, M.; Windhorst, R. A.; Ryan, R. E.; Schneider, G.; Cohen, S. H.; Jansen, R. A.; Fan, X.; Hathi, N. P.; Keel, William C.; Koekemoer, A. M.; Röttgering, H.; Scannapieco, E.; Schneider, D. P.; Strauss, M. A.; Yan, H. J. (2012-09-10)
Neutral Hydrogen in the Ringed Barred Galaxies NGC 1433 and NGC 6300

Ryder, Stuart D.; Buta, Ronald J.; Toledo, Hector; Shukla, Hemant (1996-04)

We have made observations of the H I in the southern ringed barred spiral galaxies NGC 1433 and NGC 6300 with the Australia Telescope Compact Array (ATCA), the main goal being to test the resonance theory for the origin ...
Neutralino Dark Matter in Brane World Cosmology

Okada, Nobuchika (2005-03-31)

The thermal relic density of neutralino dark matter in the brane world cosmology is studied. Since the expansion law at a high energy regime in the brane world cosmology is modified from the one in the standard cosmology, ...
Neutrino Analysis of the 2010 September Crab Nebula Flare and Time-integrated Constraints on Neutrino Emission from the Crab Using IceCube

Santander, Marcos (2011-12-28)

We present the results of a search for high-energy muon neutrinos with the IceCube detector in coincidence with the Crab Nebula flare reported on 2010 September by various experiments. Due to the unusual flaring state of ...
Neutrino Mass and Dark Matter in Light of Recent AMS-02 Results

Okada, Nobuchika (2014-05-02)

We study a simple extension of the Standard Model supplemented by an electroweak triplet scalar field to accommodate small neutrino masses by the type-II seesaw mechanism, while an additional singlet scalar field can play ...
Neutrino Oscillation Data Versus Minimal Supersymmetric SO(10) Model

Okada, Nobuchika (2002-12-08)

We reconsider the minimal supersymmetric SO(10) model, where only one 10 and one overline 1̅2̅6̅ Higgs multiplets have Yukawa couplings with matter multiplets. The model is generalized to include CP-violating phases, and ...
Neutron Production by Cosmic-Ray Muons at Shallow Depth

Piepke, Andreas (American Physical Society, 2000-10-12)

The yield of neutrons produced by cosmic ray muons at a shallow depth of 32 meters of water equivalent has been measured. The Palo Verde neutrino detector, containing 11.3 tons of Gd loaded liquid scintillator and 3.5 tons ...
A New Class of Two-Dimensional Noncommutative Spaces

Pinzul, A.; Stern, Allen (2002-04-04)

We find an infinite number of noncommutative geometries which posses a differential structure. They generalize the two dimensional noncommutative plane, and have infinite dimensional representations. Upon applying generalized ...
NGC 3081: Surface Photometry and Kinematics of a Classic Resonance Ring Barred Galaxy

Buta, Ronald J.; Purcell, Guy B. (American Astronomical Society, )

This paper presents a detailed photometric and kinematic study of the well-known Seyfert 2 galaxy NGC 3081, one of the best examples of a resonance ring barred galaxy in the sky. Improved optical images compared to previous ...
NGC 7217: A Spheroid-dominated, Early-Type Resonance Ring Spiral Galaxy

Buta, R.; Van Driel, W.; Braine, J.; Combes, F.; Wakamatsu, K.; Sofue, Y.; Tomita, A. (1995-09)

NGC 7217 is a well-known northern spiral galaxy which is characterized by flocculent spiral structure and a series of three optical ringlike zones: a nuclear ring 21" in diameter, a weak inner ring 63" in diameter, and a ...
NICMOS Coronagraphic Observations of 55 Cancri

Silverstone, Murray (2001)

We present new near-infrared (1.1 μm) observations of the circumstellar environment of the planet-bearing star 55 Cancri. With these Hubble Space Telescope (HST) images we are unable to confirm the observation of bright ...
NICMOS Coronagraphic Observations of the GM Aurigae Circumstellar Disk

Silverstone, Murray (American Astronomical Society, 2003-03)

We present Hubble Space Telescope Near Infrared Camera and Multi-Object Spectrometer (NICMOS) coronagraphic observations of the environment in the region of the young star-disk system GM Aurigae. Scattered near-infrared ...
NMSSM and Seesaw Physics at LHC

Okada, Nobuchika (2009-02-23)

We consider extensions of the next-to-minimal supersymmetric model (NMSSM) in which the observed neutrino masses are described in terms of effective dimension six (or seven) rather than dimension five operators. All such ...
Non-constant Non-commutativity in 2D Field Theories and a New Look at Fuzzy Monopoles

Stern, Allen (Elsevier, 2006-06-26)

We write down scalar field theory and gauge theory on two-dimensional non-commutative spaces M with non-vanishing curvature and non-constant non-commutativity. Usual dynamics results upon taking the limit of M going to (i) ...
Non-equilibrium Field Dynamics of an Honest Holographic Superconductor

Gao, Xin; Kaminski, Matthias; Zeng, Hua-Bi; Zhang, Hai-Qing (2012-11-20)

Most holographic models of superconducting systems neglect the effects of dynamical boundary gauge fields during the process of spontaneous symmetry-breaking. Usually a global symmetry gets broken. This yields a superfluid, ...
Non-Minimal B – L Inflation with Observable Gravity Waves

Okada, Nobuchika (2011-07-27)

We consider non-minimal λϕ⁴ inflation in a gauged non-supersymmetric U(1)B−L model containing the gravitational coupling ξRΦ†Φ, where R denotes the Ricci scalar and the standard model singlet inflaton field Φ spontaneously ...
Non-Minimal Inflation and SUSY GUTs

Okada, Nobuchika (2012-07-25)

The Standard Model Higgs boson with the nonminimal coupling to the gravitational curvature can drive cosmological inflation. We study this type of inflationary scenario in the context of supergravity. We first point out ...

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Browsing Research and Publications - Department of Physics & Astronomy by Title

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