Search Publications
First detection of X-ray line emission from Type IIn supernova 1978K with XMM-Newton's RGS
Katsuda, Satoru; Takahashi, Koh; Yoshida, Takashi +2 more
We report on robust measurements of elemental abundances of the Type IIn supernova SN 1978K, based on the high-resolution X-ray spectrum obtained with the Reflection Grating Spectrometer (RGS) onboard XMM-Newton. The RGS clearly resolves a number of emission lines, including N Ly $\alpha$ , O Ly $\alpha$ , O Ly $\beta$ , Fe xvii, Fe xviii, Ne He $…
Pattern recognition in time series for space missions: A rosetta magnetic field case study
Glassmeier, K. -H.; Richter, I.; Ostaszewski, K. +4 more
Time series analysis is a technique widely employed in space science. In unpredictable environments like space, scientific analysis relies on large data sets to enable interpretation of observations. Artificial signal interferences caused by the spacecraft itself further impede this process. The most time consuming part of these studies is the eff…
Tests of AGN Feedback Kernels in Simulated Galaxy Clusters
Voit, G. Mark; Glines, Forrest W.; O'Shea, Brian W.
In cool-core galaxy clusters with central cooling times much shorter than a Hubble time, condensation of the ambient central gas is regulated by a heating mechanism, probably an active galactic nucleus. Previous analytical work has suggested that certain radial distributions of heat input may result in convergence to a quasi-steady global state th…
Saturn's south polar cloud composition and structure inferred from 2006 Cassini/VIMS spectra and ISS images
Baines, K. H.; Sromovsky, L. A.; Fry, P. M.
We used 0.85-5.1 µm 2006 observations by Cassini's Visual and Infrared Mapping Spectrometer (VIMS) to constrain the unusual vertical structure and compositions of cloud layers in Saturn's south polar region, the site of a powerful vortex circulation, shadow-casting cloud bands, and evidence for ammonia ice clouds without lightning. Finding a…
Survey of 1-Hz waves in the near-Venusian space: Venus Express observations
Zhang, T. L.; Chen, Y. Q.; Wang, G. Q. +2 more
With 32 Hz magnetic field data of Venus Express from May 2006 to August 2012, the global spatial distributions of 1-Hz waves in the near-Venusian space are presented in this paper. The occurrence rate of 1-Hz waves is maximized near the Venusian bow shock and decreases in the upstream with the distance away from the shock. Downstream of Venusian b…
The MEFISTO and WPT Electric Field Sensors of the Plasma Wave Investigation on the BepiColombo Mio Spacecraft
Kallio, E.; Wahlund, J. -E.; Bylander, L. +13 more
This paper describes the design of MEFISTO (Mercury Electric Field In-Situ Tool) and WPT (Wire Probe Antenna) electric field sensors for Plasma Wave Investigation (PWI) on the BepiColombo Mio spacecraft (Mercury Magnetospheric Orbiter, MMO). The two sensors will enable the first observations of electric fields, plasma waves and radio waves in and …
Photometric modelling and VIS-IR albedo maps of Rhea from Cassini-VIMS
Buratti, B. J.; Clark, R. N.; Stephan, K. +6 more
Photometric correction based on the Shkuratov method is applied to derive visible and infrared albedo maps of Rhea from disc-resolved Cassini VIMS data. Differently from I/F images, albedo maps offer an optimal disentanglement of composition and physical properties of the surface from illumination-viewing effects and to study spectral variations o…
Disc galaxy resolved in H I absorption against the radio lobe of 3C 433 : Case study for future surveys
Morganti, Raffaella; Oosterloo, Tom; Emonts, Bjorn +3 more
The neutral atomic gas content of galaxies is usually studied in the H I 21 cm emission line of hydrogen. However, as we go to higher redshifts, owing to the weak strength of the transition, we need very deep integrations to detect H I emission. The H I absorption does not suffer from this dependence on distance as long as there is a sufficiently …
Multiple black hole system in 4C31.61 (2201+315)
Taris, F.; Gattano, C.; Lambert, S. B. +1 more
Modeling trajectories of radio components ejected by the nucleus of 4C31.61 (2201+315) and observed by very long baseline interferometry (VLBI) in the frame of the MOJAVE survey suggests that they are ejected from three different origins that possibly host three different supermassive black holes. These origins correspond to three stationary compo…
Increasing the census of ultracool dwarfs in wide binary and multiple systems using Dark Energy Survey DR1 and Gaia DR2 data
Bechtol, K.; Smith, M.; Abbott, T. M. C. +58 more
We present the discovery of 255 binary and 6 multiple system candidates with wide (> 5 arcsec) separation composed by ultracool dwarfs (UCDs) companions to stars, plus nine double ultracool dwarf systems. These systems were selected based on common distance criteria. About 90 per cent of the total sample has proper motions available and 73 per …