Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of California, BerkeleyUS1.3k papers
- Goddard Space Flight CenterUS1.3k papers
- California Institute of TechnologyUS1.3k papers
- The Ohio State UniversityUS1.2k papers
- Centre National de la Recherche ScientifiqueFR1.1k papers
- Massachusetts Institute of TechnologyUS1.1k papers
- University of Maryland, College ParkUS1k papers
- Center for Astrophysics Harvard & SmithsonianUS975 papers
- Lawrence Berkeley National LaboratoryUS898 papers
- University of ChicagoUS889 papers
- University of WashingtonUS868 papers
- Yale UniversityUS848 papers
302 papers · 1 filter
Correlation studies of open and closed states fluctuations in an ion channel: Analysis of ion current through a large conductance locust potassium channel
Zuzanna Siwy, Marcel Ausloos, Kristinka Ivanova
Ion current fluctuations occurring within open and closed states of large conductance locust potassium channel (BK channel) were investigated for the existence of correlation. Both…
A case study of stratus cloud base height multifractal fluctuations
K. Ivanova, H. N. Shirer, E. E. Clothiaux +4
The complex structure of a typical stratus cloud base height (or profile) time series is analyzed with respect to the variability of its fluctuations and their correlations at all…
X-ray Radiation from the Millisecond Pulsar J0437-4715
V. E. Zavlin, G. G. Pavlov, D. Sanwal +4
We report on spectral and timing observations of the nearest millisecond pulsar J0437-4715 with Chandra. The pulsar spectrum, detected up to 7 keV, cannot be described by a simple…
Signal-Locality and Subquantum Information in Deterministic Hidden-Variables Theories
Antony Valentini
It is proven that any deterministic hidden-variables theory, that reproduces quantum theory for a 'quantum equilibrium' distribution of hidden variables, must predict the existence…
On the linear stability of solitons and hairy black holes with a negative cosmological constant: the even-parity sector
E. Winstanley, O. Sarbach
Using a recently developed perturbation formalism based on curvature quantities, we complete our investigation of the linear stability of black holes and solitons with Yang-Mills h…
A GKM description of the equivariant cohomology ring of a homogeneous space
Victor Guillemin, Tara Holm, Catalin Zara
Let be a torus of dimension and a compact manifold. is a GKM manifold if the set of zero dimensional orbits in the orbit space is zero dimensional and t…
A Search for Intra-group Planetary Nebulae in the M 81 Group
John J. Feldmeier, Patrick R. Durrell, Robin Ciardullo +1
We present the initial results from an [O III] lambda 5007 survey for intra-group planetary nebulae in the M 81 group of galaxies. A total of 0.36 square degrees of the survey have…
Quantum Geometry and Gravity: Recent Advances
Abhay Ashtekar
Over the last three years, a number of fundamental physical issues were addressed in loop quantum gravity. These include: A statistical mechanical derivation of the horizon entropy…
LOTIS, Super-LOTIS, SDSS and Tautenburg Observations of GRB 010921
H. S. Park, G. G. Williams, D. H. Hartmann +36
We present multi-instrument optical observations of the High Energy Transient Explorer (HETE-2)/Interplanetary Network (IPN) error box of GRB 010921. This event was the first gamma…
The puzzling compact sources in supernova remnants
G. G. Pavlov, D. Sanwal, G. P. Garmire +1
X-ray images of some young supernova remnants show bright point sources which have not been detected in radio, optical and gamma-ray bands. Despite the similarity of the X-ray spec…
ECHA J0843.3-7905: Discovery of an 'old' classical T Tauri star in the eta Chamaeleontis cluster
Warrick A. Lawson, Lisa A. Crause, Eric E. Mamajek +1
A limited-area survey of the eta Chamaeleontis cluster has identified 2 new late-type members. The more significant of these is ECHA J0843.3-7905 (= IRAS F08450-7854), a slowly-rot…
X-raying the Ultraluminous Infrared Starburst Galaxy and Broad Absorption Line QSO, Markarian 231, with Chandra
S. C. Gallagher, W. N. Brandt, G. Chartas +2
With 40 ks of Chandra ACIS-S3 exposure, new information on both the starburst and QSO components of the X-ray emission of Markarian 231, an ultraluminous infrared galaxy and Broad…
The AGN content of hard X-ray surveys
A. Comastri, C. Vignali, M. Brusa
Multiwavelength observations of the hard X-ray selected sources discovered by BeppoSAX, Chandra and XMM-Newton surveys have significantly improved our knowledge of the AGN populati…
Kinematics of Planetary Nebulae in M 51's Tidal Tail
John Feldmeier, Chris Mihos, Patrick Durrell +2
The galaxy pair NGC 5194/95 (M 51) is one of the closest and best known interacting systems. Despite its notoriety, however, many of its features are not well studied. Extending we…
Chandra Observations of the Eastern Limb of the Vela Supernova Remnant
P. P. Plucinsky, R. K Smith, R. J. Edgar +5
We present results from two Chandra/ACIS observations of the so-called Vela ``Bullet D'' region on the eastern limb of the Vela supernova remnant. The Bullet D region is a bright X…
Spectral invariance for certain algebras of pseudodifferential operators
Robert Lauter, Bertrand Monthubert, Victor Nistor
We construct algebras of pseudodifferential operators on a continuous family groupoid G that are closed under holomorphic functional calculus, contain the algebra of all pseudodiff…
Bounding the graviton mass with binary pulsar observations
Patrick J. Sutton, Lee Samuel Finn
By comparing the observed orbital decay of the binary pulsars PSRB1913+16 and PSRB1534+12 to that predicted by general relativity due to gravitational-wave emission, we are able to…
Sculptured Thin Films: Accomplishments and Emerging Uses
Akhlesh Lakhtakia
Sculptured thin films (STFs) are nano-engineered materials whose columnar morphology is tailored to elicit desired optical responses upon excitation. Two canonical forms of STFs ha…
Caught in the Act; Chandra Observations of Microlensing of the Radio-Loud Quasar MG J0414+0534
G. Chartas, E. Agol, M. Eracleous +3
We present results from monitoring of the distant (z = 2.64), gravitationally lensed quasar MG J0414+0534 with the Chandra X-ray Observatory. An Fe Ka line at 6.49 +/- 0.09 keV (re…
The Structure of the Oxygen-rich Supernova Remnant G292.0+1.8 from Chandra X-ray Images: Shocked Ejecta and Circumstellar Medium
Sangwook Park, Peter W. A. Roming, John P. Hughes +4
We present results from the observation of the young Galactic supernova remnant (SNR) G292.0+1.8 with the Advanced CCD Imaging Spectrometer (ACIS) on board the {\it Chandra X-ray O…
On Perfect Lenses and Nihility
Akhlesh Lakhtakia
The canonical problem of a perfect lens with linear bianisotropic materials is formulated. Its solution is shown to be directly connected with the concept of nihility, the electrom…
Poisson Geometry in Constrained Systems
Martin Bojowald, Thomas Strobl
Constrained Hamiltonian systems fall into the realm of presymplectic geometry. We show, however, that also Poisson geometry is of use in this context. For the case that the constra…
Variability of the X-ray P Cygni Line Profiles from Circinus X-1 Near Zero Phase
N. S. Schulz, W. N. Brandt
The luminous X-ray binary Circinus X-1 has been observed twice near zero orbital phase using the High-Energy Transmission Grating Spectrometer (HETGS) onboard Chandra. The source w…
The BeppoSAX High Energy Large Area Survey -V. The nature of the hard X-ray source populations and its evolution
F. La Franca, F. Fiore, C. Vignali +7
We present optical spectroscopic identifications of hard X-ray (5-10 keV) selected sources belonging to the HELLAS sample obtained with BeppoSAX down to a 5-10 keV flux limit of f_…