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Numerical simulations of stellar jets and comparison between synthetic and observed maps: clues to the launch mechanism
Bacciotti, F.; Maurri, L.; Rubini, F. +2 more
High angular resolution spectra obtained with the Hubble Space Telescope Imaging Spectrograph (HST/STIS) provide rich morphological and kinematical information about the stellar jet phenomenon, which allows us to test theoretical models efficiently. In this work, numerical simulations of stellar jets in the propagation region are executed with the…
1D-FDTD Characterization of Ionosphere Influence on Ground Penetrating Radar Data Inversion
Seu, Roberto; Picardi, Giovanni; Restano, Marco
Declinations in the Almagest: accuracy, epoch, and observers
Brandt, John C.; Zimmer, Peter; Jones, Patricia B.
Almagest declinations attributed to Timocharis, Aristyllos, Hipparchus, and Ptolemy are investigated through comparisons of the reported declinations with the declinations computed from modern positions translated to the earlier epochs. Consistent results indicate an observational accuracy of ≈ 0.1° and epochs of: Timocharis, c. 298 BC; Aristyllos…
Solar wind-driven thermospheric winds over the Venus North Polar region
Fedorov, A.; Barabash, S.; Lundin, R. +3 more
Data from the neutral particle imager (NPI) on Venus Express reveals the presence of a persistent +Y (Venus Solar-Oriented) flow of Energetic Neutral Atoms (ENAs) in the Venus polar thermosphere. The overall flow morphology and altitude distribution of ENAs, solar wind H+ (SWH+), and ionospheric O+ imply that SWH
BICEP's acceleration
Contaldi, Carlo R.
The recent Bicep2 [1] detection of, what is claimed to be primordial B-modes, opens up the possibility of constraining not only the energy scale of inflation but also the detailed acceleration history that occurred during inflation. In turn this can be used to determine the shape of the inflaton potential V(ϕ) for the first time - if a single, sca…
X-ray emission from the galactic supernova remnant G12.0-0.1
Koyama, Katsuji; Bamba, Aya; Yamauchi, Shigeo
We present results of the Suzaku/XIS observation around the radio supernova remnant (SNR) G12.0-0.1. No significant diffuse emission extending in or along the radio shell was observed. Instead, two compact X-ray sources, Suzaku J181205-1835 and Suzaku J181210-1842, were found in or near G12.0-0.1. Suzaku J181205-1835 is located at the north-west o…
Outflow and plasma acceleration in Titan's induced magnetotail: Evidence of magnetic tension forces
Kurth, W. S.; Leblanc, F.; Edberg, N. J. T. +11 more
Cassini plasma wave and particle observations are combined with magnetometer measurements to study Titan's induced magnetic tail. In this study, we report and analyze the plasma acceleration in Titan's induced magnetotail observed in flybys T17, T19, and T40. Radio and Plasma Wave Science observations show regions of cold plasma with electron dens…
Spectroscopic Study of a Dark Lane and a Cool Loop in a Solar Limb Active Region by Hinode/EIS
Moon, Y. -J.; Lee, Kyoung-Sun; Lee, Jin-Yi +1 more
We investigated a cool loop and a dark lane over a limb active region on 2007 March 14 using the Hinode/EUV Imaging Spectrometer. The cool loop is clearly seen in the spectral lines formed at the transition region temperature. The dark lane is characterized by an elongated faint structure in the coronal spectral lines and is rooted on a bright poi…
Flare on 2011 September 22 and coronal mass ejection from observations in the He I 10830-Å line
Marchenko, G. P.; Akimov, L. A.; Belkina, I. L.
In this paper, we present the results from a study of the X1.4/2N flare and the accompanying coronal mass ejection (CME) on 2011 September 22 from observations of the spectral region around the He I 10830-Å line. In the study, 20 He I 10830-Å line images of the full disc of the Sun and 20 dopplerograms were obtained. Parts of the active region (AR…
The INTErnational Gamma Ray Astrophysics Laboratory: INTEGRAL Highlights
Ubertini, Pietro; Bazzano, Angela
The INTEGRAL Space Observatory was selected as the second Medium size mission (M2) of the ESAs Horizon 2000 vision programme. INTEGRAL is the first high angular and spectral resolution hard X-ray and soft γ-ray observatory with a wide band spectral response ranging from 3 keV up to 10 MeV energy band. This capability is supplemented by an unpreced…