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Evolution of clustered magnetic nulls in a turbulent-like reconnection region in the magnetotail
Dunlop, Malcolm; He, Jiansen; Wang, Xin +6 more
Magnetic null points and flux ropes play important roles in the three-dimensional process of magnetic reconnection. In this study, a cluster of null points are reconstructed in the reconnection region in the magnetotail by applying a fitting-reconstruction method to measurements from the Cluster mission. The number of reconstructed null points var…
Ambition: A Risky Adventure in Science Communication
McCaughrean, M.
This article explores how the European Space Agency made a short science fiction film about the Rosetta mission to engage audiences in the core scientific and philosophical questions of the mission, and to manage expectations regarding the risky landing of Philae on the surface of Comet 67P/Churyumov-Gerasimenko.
Observaciones combinadas XMM-Newton/Chandra del remanente de supernova G306.3-0.9
Filócomo, A.; Combi, J. A.; García, F. +3 more
In this paper we study the spatial and spectral distribution of the physical and chemical properties of the supernova remnant G306.3-0.9 by using data of the X-rays telescopes XMM-Newton and Chandra, which we complement with radio and infrared information in order to study the morphology of the source and the effect of the shock wave in the intere…
Interfacial Tension-Driven Differentiation-(ITDD) may result in a low-density central region inside kilometer-sized bodies
Arias, Francisco J.
Interfacial Tension-Driven Differentiation, (ITDD), and its possible significance with regards to the interior structures of kilometer-sized bodies is discussed. Using a simple physical and geometrical model, an analytical expression for the conditions in which ITDD can occur is derived. It is shown that ITDD coupled with internal convection can l…
A benchmark of the He-like triplet for ions with 6 ≤ Z ≤ 14 in Maxwellian and non-Maxwellian plasmas
Gatuzz, E.; Bautista, M. A.; Mendoza, C. +1 more
After an extensive assessment of the effective collision strengths available to model the He-like triplet of C V, N VI, O VII, Ne IX, Mg XI and Si XIII in collisionally dominated plasmas, new accurate effective collision strengths are reported for Ne IX. The uncertainty intervals of the density and temperature diagnostics due to the atomic data er…
Investigation of cosmic ray penetration with wavelet cross-correlation analysis
Yang, Rui-zhi
Aims: We use Fermi-LATand Planck data to calculate the cross correlation between γ-ray signal and gas distribution in different scales in giant molecular clouds (GMCs). Then we investigate the cosmic rays (CRs) penetration in GMCs with these informations.
Methods: We use the wavelet technique to decompose both the γ-ray and dust opacity …
Galactic dynamics in the times of Gaia
Aguilar, L. A.
We present a brief description of the Gaia astrometric mission and its current status. We discuss the importance of creating realistic ``mock catalogues'' to compare models and data in the space of Gaia observables, rather than mapping observables into spaces of theoretical parameters. We talk about some important lessons we have learnt in the pro…
XMM-Newton and Suzaku spectroscopic studies of unidentified X-ray sources towards the Galactic bulge: 1RXS J180556.1-343818 and 1RXS J173905.2-392615
Maeda, Yoshitomo; Mori, Hideyuki; Ueda, Yoshihiro
With XMM-Newton and Suzaku observations, for the first time, we acquired broad-band spectra of two unidentified X-ray sources towards the Galactic bulge: 1RXS J180556.1-343818 and 1RXS J173905.2-392615. The 1RXS J180556.1-343818 spectrum in the 0.3-7 keV band was explained by X-ray emission that originated from an optically-thin thermal plasma wit…
An outflow linked to a YSO in Gum 31?
Bosch, G.; Cappa, C. E.; Vazzano, M. M. +1 more
We analyze the distribution of the molecular gas associated with 10349-5824, a young stellar object located on the edge of the H ii region Gum31, with the aim of investigating the existence of bipolar outflows. We use CO(2-1) line observations obtained with the APEX telescope, H line observations on the K band taken with Flamingos 2 in Gemini Sout…
a Solution to Low Rfm Fitting Precision of Planetary Orbiter Images Caused by Exposure Time Changing
Liu, B.; Di, K.; Xu, B. +1 more
In this paper, we propose a new solution to the low RFM fitting precision caused by exposure time changing using sensor correction. First, we establish a new rigorous geometric model, with the same ephemerides, attitudes and sensor design parameters of Chang'E-2 and HRSC images, using an equal exposure time of each scan line. The original rigorous…