809 citations · 28.2k across the 927 of their papers we have counts for
49 papers · 1 filter
Cosmic-ray driven dynamo in galactic disks
M. Hanasz, K. Otmianowska-Mazur, H. Lesch +6
We present new developments on the Cosmic--Ray driven, galactic dynamo, modeled by means of direct, resistive CR--MHD simulations, performed with ZEUS and PIERNIK codes. The dynamo…
Episodic Magnetic Bubbles and Jets: Astrophysical Implications from Laboratory Experiments
Andrea Ciardi, Sergey V. Lebedev, Adam Frank +6
Collimated outflows (jets) are ubiquitous in the universe appearing around sources as diverse as protostars and extragalactic supermassive blackholes. Jets are thought to be magnet…
Studying the continuum spectrum of the parsec scale jets by multi-frequency VLBI measurements
T. Savolainen, K. Wiik, E. Valtaoja +1
Multi-frequency VLBI observations allow studies of the continuum spectrum in the different parts of the parsec scale jets of AGN, providing information on the physical properties o…
Secular evolution of viscous and self-gravitating circumstellar discs
E. I. Vorobyov, Shantanu Basu
We add the effect of turbulent viscosity via the α-prescription to models of the self-consistent formation and evolution of protostellar discs. Our models are non-axisymmetric and…
A multi-wavelength survey of AGN in the XMM-LSS field: I. Quasar selection via the KX technique
Th. Nakos, J. P. Willis, S. Andreon +16
AIMS: We present a sample of candidate quasars selected using the KX-technique. The data cover 0.68 deg^2 of the X-ray Multi-Mirror (XMM) Large-Scale Structure (LSS) survey area wh…
Discriminating different scenarios to account for the cosmic excess by synchrotron and inverse Compton radiation
Juan Zhang, Xiao-jun Bi, Jia Liu +4
The excesses of the cosmic positron fraction recently measured by PAMELA and the electron spectra by ATIC, PPB-BETS, Fermi and H.E.S.S. indicate the existence of primary electron a…
Introducing a Hybrid Method of Radiative Transfer for Smoothed Particle Hydrodynamics
Duncan Forgan, Ken Rice, Dimitris Stamatellos +1
A new means of incorporating radiative transfer into smoothed particle hydrodynamics (SPH) is introduced, which builds on the success of two previous methods - the polytropic cooli…
Dipole-active optical phonons in YTiO_3: ellipsometry study and lattice-dynamics calculations
N. N. Kovaleva, A. V. Boris, L. Capogna +6
The anisotropic complex dielectric response was accurately extracted from spectroscopic ellipsometry measurements at phonon frequencies for the three principal crystallographic dir…
Accurate Microwave Control and Real-Time Diagnostics of Neutral Atom Qubits
W. Rakreungdet, J. H. Lee, K. F. Lee +3
We demonstrate accurate single-qubit control in an ensemble of atomic qubits trapped in an optical lattice. The qubits are driven with microwave radiation, and their dynamics track…
Radiative transfer in black hole systems
Kinwah Wu, Warrick Ball, Steven V. Fuerst
We present a convariant formulation for radiative transfer in curved space time and demonstrate some applications in the black-hole systems. We calculate the emission from semi-tra…
Structures, oscillations and solitons in large-scale multi-component self-gravitating systems
Kinwah Wu, Ziri Younsi, Curtis J. Saxton
We investigate the structure of dynamics of large self-gravitating astrophysical systems using a self-interacting two-component model. We consider two cases, galaxy clusters and co…
Parity violation constraints using 2006-2007 QUaD CMB polarization spectra
QUaD Collaboration, E. Y. S. Wu, P. Ade +29
We constrain parity-violating interactions to the surface of last scattering using spectra from the QUaD experiment's second and third seasons of observations by searching for a po…
Trap Distribution and the Impact of Oxygen-induced Traps on the Charge Transport in Poly(3-Hexylthiophene)
Julia Schafferhans, Andreas Baumann, Carsten Deibel +1
The trap distribution in the conjugated polymer poly(3-hexylthiophene) was investigated by fractional thermally stimulated current measurements. Two defect states with activation e…
First Results from the Lick AGN Monitoring Project: The Mass of the Black Hole in Arp 151
Misty C. Bentz, Jonelle L. Walsh, Aaron J. Barth +24
We have recently completed a 64-night spectroscopic monitoring campaign at the Lick Observatory 3-m Shane telescope with the aim of measuring the masses of the black holes in 13 ne…
New period-luminosity and period-color relations of classical Cepheids: III. Cepheids in SMC
A. Sandage, G. A. Tammann, B. Reindl
The photometric data for 460 classical, fundamental-mode Cepheids in the SMC with log P > 0.4 measured by Udalski et al. have been analyzed for their P-C and P-L relations, and for…
CCD and photon-counting photometric observations of asteroids carried out at Padova and Catania observatories
Davide Gandolfi, Massimo Cigna, Daniele Fulvio +1
We present the results of observational campaigns of asteroids performed at Asiago Station of Padova Astronomical Observatory and at M.G. Fracastoro Station of Catania Astrophysica…
Stellar disruption by a supermassive black hole: is the light curve really proportional to ?
G. Lodato, A. R. King, J. E. Pringle
In this paper we revisit the arguments for the basis of the time evolution of the flares expected to arise when a star is disrupted by a supermassive black hole. We present a simpl…
RXTE-PCA Observations of XMMU J054134.7-682550
S. C. Inam, L. J. Townsend, V. A. McBride +3
We analyzed RXTE-PCA observations of a recent outburst of the X-ray pulsar XMMU J054134.7682550. We calculated the pulse frequency history of the source. We found no sign of a b…
Photon-Echo Quantum Memory
W. Tittel, M. Afzelius, R. L. Cone +4
The future of long-distance quantum communication relies on the availability of quantum memory, i.e. devices that allow temporal storage of quantum information. We review research…
Swift Observations of Shock Evolution in RS Ophiuchi
M. F. Bode, J. P. Osborne, K. L. Page +11
Our \textit{Swift} observations of RS Oph form an unprecedented X-ray dataset to undertake investigations of both the central source and the interaction of the outburst ejecta with…
FUSE spectroscopy of sdOB primary of the post common-envelope binary LB 3459 (AA Dor)
Johannes Fleig, Thomas Rauch, Klaus Werner +1
LB 3459 (AA Dor) is an eclipsing, close, post common-envelope binary consisting of an sdOB primary star and an unseen secondary with an extraordinarly low mass - formally a brown d…
Direct evidence of a sub-stellar companion around CT Cha
T. O. B. Schmidt, R. Neuhäuser, A. Seifahrt +5
In our ongoing search for close and faint companions around T Tauri stars, we found a very faint (Ks=14.9mag, Ks_0=14.4mag) object, just ~2.67" northwest of the Chamaeleon star-for…
Hot neutron matter from a Self-Consistent Green's Functions approach
A. Rios, A. Polls, I. Vidaña
A systematic study of the microscopic and thermodynamical properties of pure neutron matter at finite temperature within the Self-Consistent Green's Function approach is performed.…
Measurements of cosmic-ray secondary nuclei at high energies with the first flight of the CREAM balloon-borne experiment
H. S. Ahn, P. S. Allison, M. G. Bagliesi +34
We present new measurements of heavy cosmic-ray nuclei at high energies per- formed during the first flight of the balloon-borne cosmic-ray experiment CREAM (Cosmic-Ray Energetics…