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462 papers · 1 filter
The shear viscosity of two-flavor crystalline color superconducting quark matter
Sreemoyee Sarkar, Rishi Sharma
We present the first calculation of the shear viscosity for two-flavor plane wave (FF) color superconducting quark matter. This is a member of the family of crystalline color super…
AstroSat/LAXPC observation of Cygnus X-1 in the hard state
Ranjeev Misra, J S Yadav, Jai Verdhan Chauhan +10
We report the first analysis of data from AstroSat/LAXPC observations of Cygnus X-1 in January 2016. LAXPC spectra reveals that the source was in the canonical hard state, represen…
Equality of the algebraic and geometric ranks of Cartan subalgebras and applications to linearization of a system of ordinary differential equations
Hassan Azad, Indranil Biswas, Fazal M. Mahomed
If is a semisimple Lie algebra of vector fields on R^N with a split Cartan subalgebra C, then it is proved that the dimension of the generic orbit of C coincides with the dimen…
A Candidate Dual AGN in a Double-peaked Emission-line Galaxy with Precessing Radio Jets
Rubinur Khatun, M. Das, P. Kharb +1
We present high resolution radio continuum observations with the Karl G. Jansky Very Large Array at 6, 8.5, 11.5 and 15 GHz of the double-peaked emission-line galaxy 2MASXJ12032061…
Studying neutral hydrogen structures during the epoch of reionization using fractal dimensions
Bidisha Bandyopadhyay, T. Roy Choudhury, T. R. Seshadri
Fractal dimensions can be used to characterize the clustering and lacunarities in density distributions. We use generalized fractal dimensions to study the neutral hydrogen distrib…
Tale of J1328+2752: a misaligned double-double radio galaxy hosted by a binary black-hole?
S. Nandi, M. Jamrozy, R. Roy +4
We present a radio and optical study of the double-double radio galaxy J1328+2752 based on new low-frequency GMRT observations and SDSS data. The radio data were used to investigat…
A reentrant superspin glass state and magnetization steps in the oxyborate Co2AlBO5
Jitender Kumar, Soumendra Nath Panja, Deepak John +3
An oxyborate Co2AlBO5 belonging to the ludwigite family is investigated using structural, thermodynamic, dielectric and magnetic measurements. Magnetic measurements indicate that t…
The Effect of Transient Accretion on the Spin-Up of Millisecond Pulsars
Sudip Bhattacharyya, Deepto Chakrabarty
A millisecond pulsar is a neutron star that has been substantially spun up by accretion from a binary companion. A previously unrecognized factor governing the spin evolution of su…
Sums of Fractions and Finiteness of Monodromy
Eknath Ghate, T. N. Venkataramana
We solve an elementary number theory problem on sums of fractional parts, using methods from group theory. We apply our result to deduce the finiteness of certain monodromy represe…
Gamma Ray Bursts -- A radio perspective
Poonam Chandra
Gamma-ray bursts (GRBs) are extremely energetic events at cosmological distances. They provide unique laboratory to investigate fundamental physical processes under extreme conditi…
Matching Multiplications in Bit-Vector Formulas
Supratik Chakraborty, Ashutosh Gupta, Rahul Jain
Bit-vector formulas arising from hardware verification problems often contain word-level arithmetic operations. Empirical evidence shows that state-of-the-art SMT solvers are not v…
Implications of an updated ultraviolet background for the ionization mechanisms of intervening Ne VIII absorbers
Tanvir Hussain, Vikram Khaire, Raghunathan Srianand +2
Ne VIII absorbers seen in QSO spectra are useful tracers of warm ionized gas, when collisional ionization is the dominant ionization process. While photoionization by the ultraviol…
Finite Ramanujan expansions and shifted convolution sums of arithmetical functions
Giovanni Coppola, M. Ram Murty, Biswajyoti Saha
For two arithmetical functions and , we study the convolution sum of the form in the context of its asymptotic formula with explicit error terms…
Edge--Entanglement correspondence for gapped topological phases with symmetry
Maciej Koch-Janusz, Kusum Dhochak, Erez Berg
The correspondence between the edge theory and the entanglement spectrum is firmly established for the chiral topological phases. We study gapped, topologically ordered, non-chiral…
The yielding transition in amorphous solids under oscillatory shear deformation
Premkumar Leishangthem, Anshul D. S. Parmar, Srikanth Sastry
Amorphous solids are ubiquitous among natural and man-made materials. Often used as structural materials for their attractive mechanical properties, their utility depends criticall…
A Hot Companion to a Blue Straggler in NGC188 as Revealed by the Ultra-violet Imaging Telescope (UVIT) on ASTROSAT
Subramaniam Annapurni, Sindhu N., Tandon S. N. +14
We present early results from the Ultra-Violet Imaging Telescope (UVIT) onboard the ASTROSAT observatory. We report the discovery of a hot companion associated with one of the blue…
Giant Metrewave Radio Telescope detection of associated HI 21cm absorption at towards TXS1954+513
J. N. H. S. Aditya, Nissim Kanekar, J. Xavier Prochaska +3
We have used the 610 MHz receivers of the Giant Metrewave Radio Telescope (GMRT) to detect associated HI 21cm absorption from the blazar TXS1954+513. The GMRT HI 21cm…
Cluster algorithms for frustrated two dimensional Ising antiferromagnets via dual worm constructions
Geet Rakala, Kedar Damle
We report on the development of two dual worm constructions that lead to cluster algorithms for efficient and ergodic Monte Carlo simulations of frustrated Ising models with arbitr…
In-orbit Performance of UVIT and First Results
S. N. Tandon, J. B. Hutchings, S. K. Ghosh +23
The performance of the ultraviolet telescope (UVIT) on-board ASTROSAT is reported. The performance in orbit is also compared with estimates made from the calibrations done on the g…
Equilibrium and dynamic pleating of a crystalline bonded network
Saswati Ganguly, Jürgen Horbach, Peter Sollich +3
We describe a phase transition that gives rise to structurally non-trivial states in a two-dimensional ordered network of particles connected by harmonic bonds. Monte Carlo simulat…
Standing on the shoulders of Dwarfs: the Kepler asteroseismic LEGACY sample II - radii, masses, and ages
Victor Silva Aguirre, Mikkel N. Lund, H. M. Antia +21
We use asteroseismic data from the Kepler satellite to determine fundamental stellar properties of the 66 main-sequence targets observed for at least one full year by the mission.…
The most powerful astrophysical events: Gravitational-wave peak luminosity of binary black holes as predicted by numerical relativity
David Keitel, Xisco Jiménez Forteza, Sascha Husa +9
For a brief moment, a binary black hole (BBH) merger can be the most powerful astrophysical event in the visible universe. Here we present a model fit for this gravitational-wave p…
Search for heavy gauge W' bosons in events with an energetic lepton and large missing transverse momentum at sqrt(s) = 13 TeV
CMS Collaboration
A search is presented for W' bosons in events with an electron or muon and large missing transverse momentum, using proton-proton collision data at sqrt(s) = 13 TeV collected with…
Measurement of electroweak-induced production of W gamma with two jets in pp collisions at sqrt(s) = 8 TeV and constraints on anomalous quartic gauge couplings
CMS Collaboration
A measurement of electroweak-induced production of W gamma and two jets is performed, where the W boson decays leptonically. The data used in the analysis correspond to an integrat…