Results 101 to 110 of about 10,047 (199)

On the relativistic mass function and averaging in cosmology

, 2015
The general relativistic description of cosmological structure formation is an important challenge from both the theoretical and the numerical point of views. In this paper we present a brief prescription for a general relativistic treatment of structure
Buchert, Thomas, Ostrowski, Jan J., Roukema, Boudewijn F.   +2 more
core   +4 more sources

The Microchannel X-ray Telescope on Board the SVOM Satellite

, 2015
We present the Micro-channel X-ray Telescope (MXT), a new narrow-field (about 1{\deg}) telescope that will be flying on the Sino-French SVOM mission dedicated to Gamma-Ray Burst science, scheduled for launch in 2021.
Adami, C., Basa, S., Beckmann, V., Burwitz, V., Chipaux, R., Cordier, B., Evans, P., Godet, O., Gonzalez, F., Goosmann, R., Gotz, D., Meidinger, N., Mercier, K., Meuris, A., Motch, C., Nandra, K., O'Brien, P., Osborne, J., Perinati, E., Rau, A., Willingale, R.   +20 more
core   +1 more source

Characterization of Shallow Sedimentary Layers in the Oran Region Using Ambient Vibration Data

Applied Sciences
This study investigates the structure of shear-wave velocities (Vs) in the shallow layers of the Oran region, north-west of Algeria, using non-invasive techniques based on ambient vibration arrays. The region has experienced several moderate earthquakes,
Ahmed Saadi, Juan José Galiana-Merino, Fethi Semmane, Abdelkrim Yelles-Chaouche, Abdelouahab Issaadi   +4 more
doaj   +1 more source

On the location of the ring around the dwarf planet Haumea

, 2019
The recently discovered ring around the dwarf planet (136108) Haumea is located near the 1:3 resonance between the orbital motion of the ring particles and the spin of Haumea.
Borderes-Motta1, G., Ribeiro, T., Winter1, O. C.   +2 more
core   +1 more source

On the Green and Wald formalism

, 2015
Backreaction in the cosmological context is a longstanding problem that is especially important in the present era of precise cosmology. The standard model of a homogeneous background plus density perturbations is most probably oversimplified and is ...
Ostrowski, Jan J., Roukema, Boudewijn F.
core   +3 more sources

Exact phase shifts for atom interferometry

, 2002
In the case of an external Hamiltonian at most quadratic in position and momentum operators, we use the ABCD formulation of atom optics to establish an exact analytical phase shift expression for atom interferometers with arbitrary spatial or temporal ...
Audretsch, Bordé, Bordé, Bordé, Bordé, Ch. Antoine, Ch.J. Bordé, Ishikawa, Peters, Snadden, Wolf   +10 more
core   +1 more source

Author Correction: In situ recording of Mars soundscape. [PDF]

Nature, 2022
Maurice S, Chide B, Murdoch N, Lorenz RD, Mimoun D, Wiens RC, Stott A, Jacob X, Bertrand T, Montmessin F, Lanza NL, Alvarez-Llamas C, Angel SM, Aung M, Balaram J, Beyssac O, Cousin A, Delory G, Forni O, Fouchet T, Gasnault O, Grip H, Hecht M, Hoffman J, Laserna J, Lasue J, Maki J, McClean J, Meslin PY, Le Mouélic S, Munguira A, Newman CE, Rodríguez Manfredi JA, Moros J, Ollila A, Pilleri P, Schröder S, de la Torre Juárez M, Tzanetos T, Stack KM, Farley K, Williford K, SuperCam team.   +42 more
europepmc   +1 more source

Far-infrared to centimeter emission of very nearby galaxies with archival data

Astronomy & Astrophysics
Compared to the well-studied infrared and radio domains, galaxy emission in the range from a few millimeters (mm) to centimeters (cm) (300−30 GHz) has been observed less frequently.
Correia L., Bot C., Chastenet J., Rymar A., Paladini R., Bethermin M., Ismail D., Lutz K. A., Bernard J.-P., Hughes A., Paradis D., Ysard N.   +11 more
doaj   +1 more source

The puzzle of the soft X-ray excess in AGN: absorption or reflection?

, 2005
The 2-10 keV continuum of AGN is generally well represented by a single power law. However, at smaller energies the continuum displays an excess with respect to the extrapolation of this power law, called the ''soft X-ray excess''.
Chevallier, L., Collin, S., Czerny, B., Dumont, A. -M., Goncalves, A. C., Goosmann, R. W., Mouchet, M.   +6 more
core   +1 more source

On Restrictions of Current Warp Drive Spacetimes and Immediate Possibilities of Improvement

Universe
Looking at current proposals of so-called ‘warp drive spacetimes’, they appear to employ General Relativity only at an elementary level. A number of strong restrictions are imposed such as flow-orthogonality of the spacetime foliation, vanishing spatial ...
Hamed Barzegar, Thomas Buchert
doaj   +1 more source