Search Publications
Dawn-dusk scale of dipolarization front in the Earth's magnetotail: multi-cases study
André, M.; Vaivads, A.; Deng, X. H. +10 more
We analyze three dipolarization front (DF) events to investigate their dawn-dusk scales in the Earth's magnetotail using the Cluster measurements in year 2007, when the spacecraft separation is about 1.8 Re (Re is the Earth's radius) and is appropriate for investigating the DF scale. Based on the Minimum Variance Analysis (MVA) and the general sha…
Power law inflation with a non-minimally coupled scalar field in light of Planck 2015 data: the exact versus slow roll results
Herrera, Ramón; del Campo, Sergio; Gonzalez, Carlos
We study the power law inflation in the context of non-minimally coupled to the scalar curvature. We analyze the inflationary solutions under an exact analysis and also in the slow roll approximations. In both solutions, we consider the recent data from Planck 2015 data to constraint the parameters in our model. In this framework, we find that in …
Anomalous Earth flybys of spacecraft
Wilhelm, Klaus; Dwivedi, Bhola N.
A small deviation from the
X-ray spectral parameters for a sample of 95 active galactic nuclei
Vasylenko, A. A.; Fedorova, E. V.; Zhdanov, V. I.
We present a broadband X-ray analysis of a new homogeneous sample of 95 active galactic nuclei (AGN) from the 22-month Swift/BAT all-sky survey. For this sample we treated jointly the X-ray spectra observed by XMM-Newton and INTEGRAL missions for the total spectral range of 0.5–250 keV. Photon index
The quasi-periodic behavior of recurrent jets caused by emerging magnetic flux
Yang, J. Y.; Liang, H. F.; Jiang, Y. C. +2 more
A series of recurring jets occurred at the edge of an active region NOAA 11459 on 2012 April 20, and they were observed simultaneously at EUV and soft X-ray wavelengths. They also were sometimes associated with a hard X-ray source at the base region. The jets might have resulted from magnetic reconnection between the newly emerging flux and the pr…
Non-local scalar fields inflationary mechanism in light of Planck 2013
Sheikhahmadi, Haidar; Ghorbani, Soheyla; Saaidi, Khaled
A generalization of the canonical and non-canonical theory of inflation is introduced in which the kinetic energy term in action is written as non-local term. The inflationary universe within the framework of considering this non-locality will be studied. To investigate the effects of non-locality on the inflationary parameters we consider two wel…
Constraints on the combined models with R 2 ‑ q f ( R )
Geng, Chao-Qiang; Lee, Chung-Chi; Lin, Shan
We investigate the observational constraints on the modified gravity, which combines the
Particle-in-cell modeling of Dual Segmented Langmuir Probe on PROBA2
Imtiaz, Nadia; Marchand, Richard
We model the current characteristics of the Dual Segmented Langmuir Probe (DSLP), which is a part of the scientific payload of the ESA satellite PROBA2. It is used for the directional measurement of plasma parameters in the ionosphere at an altitude of approximately 725 km. The DSLP consists of two independent segmented Langmuir probes. Each probe…
The distance to the Galactic center determined by A–F stars
Branham, Richard L.
The distance from the sun to the center of the Galaxy
Improved SOT (Hinode mission) high resolution solar imaging observations
Koutchmy, S.; Adjabshirizadeh, A.; Goodarzi, H.
We consider the best today available observations of the Sun free of turbulent Earth atmospheric effects, taken with the Solar Optical Telescope (SOT) onboard the Hinode spacecraft. Both the instrumental smearing and the observed stray light are analyzed in order to improve the resolution. The Point Spread Function (PSF) corresponding to the blue …