Results 101 to 110 of about 20,448 (244)
, 2014 The Crab nebula pulsar was observed in 2009 January and December with a novel very fast optical photon counter, Iqueye, mounted at the ESO 3.5 m New Technology Telescope.
Barbieri, C. +8 more
core +1 more source
Orbital Motions and the Conservation-Law/Preferred-Frame α3 Parameter
Galaxies, 2014 We analytically calculate some orbital effects induced by the Lorentz-invariance momentum-conservation parameterized post-Newtonian (PPN) parameter \(\alpha_3\) in a gravitationally bound binary system made of a primary orbited by a test particle.
Lorenzo Iorio
doaj +1 more source
Solar diameter with 2012 Venus transit
, 2012 The role of Venus and Mercury transits is crucial to know the past history of the solar diameter. Through the W parameter, the logarithmic derivative of the radius with respect to the luminosity, the past values of the solar luminosity can be recovered ...
Sigismondi, Costantino
core +1 more source
Ephemerides of the outer Jovian satellites [PDF]
Astronomy & Astrophysics, 2005 The results of the determination of orbits for 54 outer satellites of Jupiter based on all available observations of these satellites are presented. The problem was solved using numerical integration method applied to the equations of satellite motion. After initial conditions of integration were refined, the residuals of observations from theory were ...
openaire +4 more sources
Post-Glitch RXTE-PCA Observations of the Vela Pulsar
, 2000 We report the results of analysis of observations of the Vela Pulsar by PCA on RXTE. Our data consists of two parts. The first part contains observations at 1, 4, and 9 days after the glitch in 1996 and has 27000 sec. total exposure time. The second part
Alpar, M. Ali +4 more
core +1 more source
Planetary and Lunar ephemerides, INPOP10A [PDF]
arXiv, 2010 The Planetary and Lunar ephemerides INPOP10a version has several improvements in the fitting process, the data sets used in the fit and in the general features of the solution. No big change was brought in the dynamics. As a consequence of these changes, the extrapolation capabilities of INPOP10a are improved compared to INPOP08, especially for the ...
arxiv
Testing theories of gravity with planetary ephemerides
Living Reviews in RelativityWe describe here how planetary ephemerides are built in the framework of General Relativity and how they can be used to test alternative theories. We focus on the definition of the reference frame (space and time) in which the planetary ephemeris is ...
Agnès Fienga, Olivier Minazzoli
doaj +1 more source