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In Situ Detection of Organics in the Comet 67P/Churyumov-Gerasimenko
Kaiser, Ralf I.; Bergantini, Alexandre
Comets are fascinating objects transporting complex organic molecules from the outer to the inner solar system. A paper published in Nature by Fray and co-workers presents key results of the Rosetta mission by collecting in situ data of refractory grains from comet 67P/Churyumov-Gerasimenko in 2014.
LYRA Mid-Term Periodicities
Dammasch, I. E.; Dominique, M.; Wauters, L.
The spectra of the PROBA2/LYRA data, similarly to every other solar time series, show predominant periodicities that can be of solar or instrumental origin. In this article, we compare the main periodicities characterizing the LYRA spectrum to those found in the sunspot number, in the 10.7 cm flux, in an X-ray flare index, and in the sunspot area …
XMM-Newton and Chandra Observations of the Filled-center Supernova Remnant G63.7+1.1
Safi-Harb, S.; Kothes, R.; Matheson, H.
Pulsar wind nebulae (PWNe) provide unique opportunities to study relativistic pulsar winds and their interaction with the surrounding medium. G63.7+1.1 is an intriguing supernova remnant studied so far only at radio wavelengths and classified as a PWN candidate based on its nonthermal radio emission. We present the first X-ray study of G63.7+1.1, …
Analysis of luminosity distributions and the shape parameters of strong gravitational lensing elliptical galaxies
Magain, P.; Sluse, D.; Chantry, V. +1 more
Context. The luminosity profiles of galaxies acting as strong gravitational lenses can be tricky to study. Indeed, strong gravitational lensing images display several lensed components, both point-like and diffuse, around the lensing galaxy. Those objects limit the study of the galaxy luminosity to its inner parts. Therefore, the usual fitting met…
Comet 67P/Churyumov-Gerasimenko, location of pristine material?
Kossacki, Konrad J.
This work is intended to answer the question, whether on comet 67P/Churyumov-Gerasimenko pristine, not hardened material can be locally preserved close to the surface. Simulated is the thermally driven sintering of ice-dust grains underlying the dust mantle. Considered is the Ma'at region located at the north side of the small lobe Head. It is sho…
Consistency relation and non-Gaussianity in a Galileon inflation
Asadi, Kosar; Nozari, Kourosh
We study a particular Galileon inflation in the light of Planck2015 observational data in order to constraint the model parameter space. We study the spectrum of the primordial modes of the density perturbations by expanding the action up to the second order in perturbations. Then we pursue by expanding the action up to the third order and find th…
Tomographic Separation of Composite Spectra. XII. The Physical Properties and Spectral Phase Variability of the Massive Close Binary HD 159176
Penny, Laura R.; Epps, Jacob G.; Snyder, Joseph D.
We present our analysis of the double-lined, O-binary HD 159176 based on observations made with the International Ultraviolet Explorer (IUE). We use cross-correlation methods to obtain radial velocities, confirm the orbital elements, and estimate the UV flux ratio. In addition, we cross-correlate specific regions of the IUE spectra corresponding t…
Editorial of the special issue - "Rosetta and Philae at comet 67P/Churyumov-Gerasimenko"
Taylor, Matthew G. G. T.; Ulamec, Stephan
Giotto, the first european/ESA - interplanetary space probe had not flown by Halley's comet, yet, when the first plans for the next mission to investigate a comet were being made. back in 1984, Rosetta became part of ESAs horizon 2000 programme, originally envisioned as a comet nucleus sample return mission.
Scattering of hydrogen, nitrogen and water ions from micro pore optic plates for application in spaceborne plasma instrumentation
Barabash, Stas; Wieser, Martin; Stude, Joan
Time-of-flight mass spectrometers for upcoming space missions into enhanced radiation environments need to be small, light weight and energy efficient. Time-of-flight systems using surface interactions as start-event generation can be smaller than foil-type instruments. Start surfaces for such applications need to provide narrow angular scattering…
Diagnosing transient plasma status: from solar atmosphere to tokamak divertor
Doyle, J. G.; Summers, H. P.; Giunta, A. S. +3 more
This work strongly exploits the interdisciplinary links between astrophysical (such as the solar upper atmosphere) and laboratory plasmas (such as tokamak devices) by sharing the development of a common modelling for time-dependent ionisation. This is applied to the interpretation of solar flare data observed by the UVSP (Ultraviolet Spectrometer …