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- Centre National de la Recherche ScientifiqueFR493 papers
- National Institute for AstrophysicsIT482 papers
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- University of PaduaIT407 papers
- Universidad de La LagunaES383 papers
- California Institute of TechnologyUS356 papers
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48 papers · 1 filter
Static spherically symmetric perfect fluid solutions in theories of gravity
T. Multamaki, I. Vilja
Static spherically symmetric perfect fluid solutions are studied in metric theories of gravity. We show that pressure and density do not uniquely determine ie. given…
Intrinsic unsharpness and approximate repeatability of quantum measurements
C. Carmeli, T. Heinonen, A. Toigo
The intrinsic unsharpness of a quantum observable is studied by introducing the notion of resolution width. This quantification of accuracy is shown to be closely connected with th…
A note on infinite extreme correlation matrices
J. Kiukas, J. -P. Pellonpää
We give a characterization for the extreme points of the convex set of correlation matrices with a countable index set. A Hermitian matrix is called a correlation matrix if it is p…
Quantization and noiseless measurements
J. Kiukas, P. Lahti
In accordance with the fact that quantum measurements are described in terms of positive operator measures (POMs), we consider certain aspects of a quantization scheme in which a c…
Observation of very high energy gamma-rays from the AGN 1ES 2344+514 in a low emission state with the MAGIC telescope
J. Albert et al.
The MAGIC collaboration has observed very high energy gamma ray emission from the AGN 1ES 2344+514. A gamma-ray signal corresponding to an 11 sigma excess and an integral flux of (…
Kinematics of the Local Universe XIII. 21-cm line measurements of 452 galaxies with the Nançay radiotelescope, JHK Tully-Fisher relation and preliminary maps of the peculiar velocity field
Gilles Theureau, Mikko Hanski, Nicole Coudreau +2
This paper presents 452 new 21-cm neutral hydrogen line measurements carried out with the FORT receiver of the meridian transit Nançay radiotelescope (NRT) in the period April 2003…