764 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University College DublinIE182 papers
- Center for Astrophysics Harvard & SmithsonianUS167 papers
- Purdue University West LafayetteUS154 papers
- McGill UniversityCA153 papers
- University of California, Santa CruzUS151 papers
- Washington University in St. LouisUS150 papers
- Iowa State UniversityUS149 papers
- University of California, Los AngelesUS149 papers
- University of UtahUS149 papers
- Columbia UniversityUS138 papers
- Munster Technological UniversityIE138 papers
- University of ChicagoUS138 papers
20 papers · 1 filter
Spectrum of the non-abelian phase in Kitaev's honeycomb lattice model
Ville Lahtinen, Graham Kells, Angelo Carollo +3
The spectral properties of Kitaev's honeycomb lattice model are investigated both analytically and numerically with the focus on the non-abelian phase of the model. After summarizi…
Commensurations and Subgroups of Finite Index of Thompson's Group F
José Burillo, Sean Cleary, Claas E. Röver
We determine the abstract commensurator com(F) of Thompson's group F and describe it in terms of piecewise linear homeomorphisms of the real line and in terms of tree pair diagrams…
Detection of faint companions through stochastic speckle discrimination
Szymon Gladysz, Julian C. Christou
We propose a new post-processing technique for the detection of faint companions from a sequence of adaptive optics corrected short exposures. The algorithm exploits the difference…
Codes from Zero-divisors and Units in Group Rings
Paul Hurley, Ted Hurley
We describe and present a new construction method for codes using encodings from group rings. They consist primarily of two types: zero-divisor and unit-derived codes. Previous cod…
Multiwavelength Observations of Markarian 421 in March 2001: an Unprecedented View on the X-ray/TeV Correlated Variability
G. Fossati, J. H. Buckley, I. H. Bond +26
(Abridged) We present a detailed analysis of week-long simultaneous observations of the blazar Mrk421 at 2-60 keV X-rays (RXTE) and TeV gamma-rays (Whipple and HEGRA) in 2001. The…
VLT / Infrared Integral Field Spectrometer Observations of Molecular Hydrogen Lines in the Knots in the Planetary Nebula NGC 7293 (the Helix Nebula)
M. Matsuura, A. K. Speck, M. D. Smith +6
Knots are commonly found in nearby planetary nebulae (PNe) and star forming regions. Within PNe, knots are often found to be associated with the brightest parts of the nebulae and…
Rotational Modulation of M/L Dwarfs due to Magnetic Spots
C. Lane, G. Hallinan, R. T. Zavala +7
We find periodic I-band variability in two ultracool dwarfs, TVLM 513-46546 and 2MASS J00361617+1821104, on either side of the M/L dwarf boundary. Both of these targets are short-p…
A search for CO+ in planetary nebulae
T. A. Bell, W. Whyatt, S. Viti +1
We have carried out a systematic search for the molecular ion CO+ in a sample of 8 protoplanetary and planetary nebulae in order to determine the origin of the unexpectedly strong…
A Quiver Presentation for Solomon's Descent Algebra
Goetz Pfeiffer
The descent algebra is a subalgebra of the group algebra $\Q W$ of a finite Coxeter group , which supports a homomorphism with nilpotent kernel and commutative image in t…
Torus n-Point Functions for -graded Vertex Operator Superalgebras and Continuous Fermion Orbifolds
Geoffrey Mason, Michael P. Tuite, Alexander Zuevsky
We consider genus one n-point functions for a vertex operator superalgebra with a real grading. We compute all n-point functions for rank one and rank two fermion vertex operator s…
Kinematics of the Broad Line Region in M81
Nick Devereux, Andrew Shearer
A new model is presented which explains the origin of the broad emission lines observed in the LINER/Seyfert nucleus of M81 in terms of a steady state spherically symmetric inflow,…
Deep optical observations of the interaction of the SS 433 microquasar jet with the W 50 radio continuum shell
P. Boumis, J. Meaburn, J. Alikakos +6
Four mosaics of deep, continuum-subtracted, CCD images have been obtained over the extensive galactic radio continuum shell, W 50, which surrounds the remarkable stellar system SS…
Sporadic Long-term Variability in Radio Activity from a Brown Dwarf
A. Antonova, J. G. Doyle, G. Hallinan +2
Radio activity has been observed in a large variety of stellar objects, including in the last few years, ultra-cool dwarfs. To explore the extent of long-term radio activity in ult…
The -modular descent algebras
M. D. Atkinson, G. Pfeiffer, S. J. van Willigenburg
The concept of descent algebras over a field of characteristic zero is extended to define descent algebras over a field of prime characteristic. Some basic algebraic structure of t…
Periodic Bursts of Coherent Radio Emission from an Ultracool Dwarf
G. Hallinan, S. Bourke, C. Lane +7
We report the detection of periodic (p = 1.96 hours) bursts of extremely bright, 100% circularly polarized, coherent radio emission from the M9 dwarf TVLM 513-46546. Simultaneous p…
Constructing convex planes in the pants complex
Javier Aramayona, Hugo Parlier, Kenneth J. Shackleton
Our main theorem identifies a class of totally geodesic subgraphs of the 1-skeleton of the pants complex, each isomorphic to the product of two Farey graphs. We deduce the existenc…
Fokker-Planck and Chapman-Kolmogorov equations for Ito processes with finite memory
Joseph L. McCauley
The usual derivation of the Fokker-Planck partial differential eqn. assumes the Chapman-Kolmogorov equation for a Markov process. Starting instead with an Ito stochastic differenti…
Very High Energy Observations of Gamma-Ray Burst Locations with the Whipple Telescope
D. Horan, R. W. Atkins, H. M. Badran +56
Gamma-ray burst (GRB) observations at very high energies (VHE, E > 100 GeV) can impose tight constraints on some GRB emission models. Many GRB afterglow models predict a VHE compon…
Martingales, Detrending Data, and the Efficient Market Hypothesis
Joseph L. McCauley, Kevin E. Bassler, Gemunu H. Gunaratne
We discuss martingales, detrending data, and the efficient market hypothesis for stochastic processes x(t) with arbitrary diffusion coefficients D(x,t). Beginning with x-independen…
Markov vs. nonMarkovian processes A comment on the paper Stochastic feedback, nonlinear families of Markov processes, and nonlinear Fokker-Planck equations by T.D. Frank
Joseph L. McCauley
The purpose of this comment is to correct mistaken assumptions and claims made in the paper Stochastic feedback, nonlinear families of Markov processes, and nonlinear Fokker-Planck…