Search Publications
Missions
Journals
Publication Years
Long-term survival of surface water ice on comet 67P
Jorda, L.; Lamy, P. L.; Lara, L. M. +53 more
Numerous water-ice-rich deposits surviving more than several months on comet 67P/Churyumov-Gerasimenko were observed during the Rosetta mission. We announce the first-time detection of water-ice features surviving up to 2 yr since their first observation via OSIRIS (Optical, Spectroscopic, and Infrared Remote Imaging System) NAC (narrow angle came…
Obscured active galactic nuclei triggered in compact star-forming galaxies
Juneau, Stéphanie; Capak, Peter; McCracken, H. J. +10 more
We present a structural study of 182 obscured active galactic nuclei (AGNs) at z ≤ 1.5, selected in the Cosmic Evolution Survey field from their extreme infrared to X-ray luminosity ratio and their negligible emission at optical wavelengths. We fit optical to far-infrared spectral energy distributions and analyse deep Hubble Space Telescope imagin…
Enhancement of oxygen in the magnetic island associated with dipolarization fronts
Cao, J. B.; Fu, H. S.; Liu, W. L. +2 more
A significant enhancement of O+ is observed by Cluster inside an earthward propagating magnetic island behind a dipolarization front (DF). Such enhancement, from 0.005 to 0.03 cm-3, makes the O+ flux inside the magnetic island 20 times larger than that outside the magnetic island. In the meantime, the H+…
The Dynamics of Very High Alfvén Mach Number Shocks in Space Plasmas
Burgess, David; Sulaiman, Ali H.; Sundberg, Torbjörn +2 more
Astrophysical shocks, such as planetary bow shocks or supernova remnant shocks, are often in the high or very-high Mach number regime, and the structure of such shocks is crucial for understanding particle acceleration and plasma heating, as well inherently interesting. Recent magnetic field observations at Saturn’s bow shock, for Alfvén Mach numb…
The puzzling orbital period evolution of the LMXB AX J1745.6-2901
Stella, L.; Nandra, K.; Ponti, G. +2 more
The orbital period evolution of X-ray binaries provides fundamental clues to understanding mechanisms of angular momentum transfer and loss in these systems. We present an X-ray eclipse timing analysis of the transient low-mass X-ray binary AX J1745.6-2901. This system shows full eclipses and thus is one of the few objects of this class for which …
Coogoon Valles, western Arabia Terra: Hydrological evolution of a complex Martian channel system
de Pablo, Miguel Ángel; Molina, Antonio; López, Iván +3 more
Coogoon Valles is an intricate fluvial system, and its main channel was formed during the Noachian period through the erosion of the clay-bearing basement of the Western Arabia Terra. This region is characterized by a thinner crust compared to the rest of the highlands and by the occurrence of massive phyllosilicate-bearing materials. The origin o…
Reconstruction of a helical prominence in 3D from IRIS spectra and images
Schmieder, B.; Labrosse, N.; López Ariste, A. +3 more
Context. Movies of prominences obtained by space instruments e.g. the Solar Optical Telescope (SOT) aboard the Hinode satellite and the Interface Region Imaging Spectrograph (IRIS) with high temporal and spatial resolution revealed the tremendous dynamical nature of prominences. Knots of plasma belonging to prominences appear to travel along both …
A new solar wind-driven global dynamic plasmapause model: 2. Model and validation
Gallagher, Dennis L.; He, Fei; Liemohn, Mike W. +5 more
A new solar wind-driven global dynamic plasmapause (NSW-GDP) model has been constructed based on the largest currently available database containing 49,119 plasmapause crossing locations and 3957 plasmapause profiles (corresponding to 48,899 plasmapause locations), from 18 satellites during 1977-2015 covering four solar cycles. This model is compi…
Physical Structures of the Type Ia Supernova Remnant N103B
Walter, Frederick M.; Pan, Kuo-Chuan; Ricker, Paul M. +6 more
N103B is a Type Ia supernova remnant (SNR) projected in the outskirts of the superbubble around the rich cluster NGC 1850 in the Large Magellanic Cloud (LMC). We have obtained Hα and continuum images of N103B with the Hubble Space Telescope (HST) and high-dispersion spectra with the 4 m and 1.5 m telescopes at Cerro Tololo Inter-American Observato…
Indications of a Si-rich bilateral jet of ejecta in the Vela SNR observed with XMM-Newton
Miceli, M.; Bocchino, F.; Orlando, S. +4 more
Context. The Vela supernova remnant displays several ejecta, which are fragment-like features protruding beyond the front of its primary blast shock wave. They appear to be "shrapnel", bowshock-shaped relics of the supernova explosion. One of these pieces of shrapnel (A), located in the northeastern edge of the remnant, is peculiar because its X-r…