Search Publications
Mapping of interstellar clouds with infrared light scattered from dust: TMC-1N
Juvela, M.; Malinen, J.; Pelkonen, V. -M. +1 more
Context. Mapping of the near-infrared (NIR) scattered light is a recent method for the study of interstellar clouds, complementing other, more commonly used methods, like dust emission and extinction.
Aims: Our goal is to study the usability of this method on larger scale, and compare the properties of a filamentary structure using infrared s…
Spatial heterogeneity in the radiogenic activity of the lunar interior: Inferences from CHACE and LLRI on Chandrayaan-1
Bhardwaj, Anil; Sridharan, R.; Ahmed, S. M. +3 more
In the past, clues on the potential radiogenic activity of the lunar interior have been obtained from the isotopic composition of noble gases like Argon. Excess Argon (40) relative to Argon (36), as compared to the solar wind composition, is generally ascribed to the radiogenic activity of the lunar interior. Almost all the previous estimates were…
Galaxy gas ejection in radio galaxies: the case of 3C 35
Birkinshaw, M.; Worrall, D. M.; Mannering, E.
We report results from XMM-Newton and Chandra observations of the nearby (z = 0.067) giant radio galaxy 3C 35. We find evidence for an X-ray-emitting gas belt, orthogonal to and lying between the lobes of 3C 35, which we interpret as fossil-group gas driven outwards by the expanding radio lobes. We also detect weak emission from a second, more ext…
The Role of Pickup Ions on the Structure of the Venusian Bow Shock and its Implications for the Termination Shock
Zank, Gary P.; Zhang, Tielong; Wang, Shui +5 more
The recent crossing of the termination shock by Voyager 2 has demonstrated the important role of pickup ions (PUIs) in the physics of collisionless shocks. The Venus Express (VEX) spacecraft orbits Venus in a 24 hr elliptical orbit that crosses the bow shock twice a day. VEX provides a unique opportunity to investigate the role of PUIs on the stru…
Digital Archive of UKRVO: The Positional Accuracy of Minor Planets Determinations
Andruk, V.; Golovnya, V.
Scanning and astrometric processing of two 30x30 cm photographic plates with images of minor planets were conducted. The plates were obtained at the double wide-angle astrograph (DWAA, 400/2000) on the program of photographic sky survey and the program of small planets' observations. The plates were digitized using a flatbed scanner Epson Expressi…
Fe XII Stalks and the Origin of the Axial Field in Filament Channels
Stenborg, G.; Sheeley, N. R., Jr.; Wang, Y. -M.
Employing Fe XII images and line-of-sight magnetograms, we deduce the direction of the axial field in high-latitude filament channels from the orientation of the adjacent stalklike structures. Throughout the rising phase of the current solar cycle 24, filament channels poleward of latitude 30° overwhelmingly obeyed the hemispheric chirality rule, …
The XMM-Newton Wide Angle Survey (XWAS)
Esquej, P.; Ebrero, J.; Carrera, F. J. +16 more
Aims: This programme is aimed at obtaining one of the largest X-ray selected samples of identified active galactic nuclei to date in order to characterise such a population at intermediate fluxes, where most of the Universe's accretion power originates. We present the XMM-Newton Wide Angle Survey (XWAS), a new catalogue of almost a thousand X…
Metal jumps across sloshing cold fronts: The case of A 496
Molendi, S.; De Grandi, S.; Ghizzardi, S.
Cold-fronts in cool-core clusters are thought to be induced by minor mergers and to develop through a sloshing mechanism. While temperature and surface-brightness jumps have been detected and measured in many systems, a detailed characterization of the metal abundance across the discontinuity is only available for a handful of objects. Within the …
Understanding shock dynamics in the inner heliosphere with modeling and type II radio data: A statistical study
St. Cyr, O. C.; Odstrcil, D.; Gopalswamy, N. +2 more
We study two methods of predicting interplanetary shock location and strength in the inner heliosphere: (1) the ENLIL simulation and (2) the kilometric type II (kmTII) prediction. To evaluate differences in the performance of the first method, we apply two sets of coronal mass ejections (CME) parameters from the cone-model fitting and flux-rope (F…
Suzaku/WAM and RHESSI Observations of Non-thermal Electrons in Solar Microflares
Krucker, Säm; Ohno, Masanori; Lin, Robert P. +1 more
We report on hard X-ray spectroscopy of solar microflares observed by the Wide-band All-sky Monitor (WAM), on board the Suzaku satellite, and by RHESSI. WAM transient data provide wide energy band (50 keV-5 MeV) spectra over a large field of view (~2π sr) with a time resolution of 1 s. WAM is attractive as a hard X-ray solar flare monitor due to i…