Search Publications
The interplanetary magnetic structure that guides solar relativistic particles
Klein, K. -L.; Démoulin, P.; Dasso, S. +1 more
Context. Relating in-situ measurements of relativistic solar particles to their parent activity in the corona requires understanding the magnetic structures that guide them from their acceleration site to the Earth. Relativistic particle events are observed at times of high solar activity, when transient magnetic structures such as interplanetary …
Enhanced atmospheric oxygen outflow on Earth and Mars driven by a corotating interaction region
Barabash, S.; Lundin, R.; Woch, J. +10 more
Solar wind controls nonthermal escape of planetary atmospheric volatiles, regardless of the strength of planetary magnetic fields. For both Earth with a strong dipole and Mars with weak remnant fields, the oxygen ion (O+) outflow has been separately found to be enhanced during corotating interaction region (CIR) passage. Here we compare…
Kinetic simulations of finite gyroradius effects in the lunar plasma environment on global, meso, and microscales
Barabash, Stas; Jarvinen, Riku; Kallio, Esa +12 more
The recent in situ particle measurements near the Moon by Chandrayaan-1 and Kaguya missions as well as the earlier observation by the Lunar Prospector have shown that the Moon-solar wind interaction is more complicated than believed earlier. The new observations have arisen the need for a detailed modelling of the near surface plasma-surface proce…
AKARI Infrared Camera Survey of the Large Magellanic Cloud. I. Point-source Catalog
Onaka, Takashi; Tanabé, Toshihiko; Ita, Yoshifusa +10 more
We present a near- to mid-infrared point-source catalog of five photometric bands at 3.2, 7, 11, 15, and 24 µm for a 10 deg2 area of the Large Magellanic Cloud (LMC) obtained with the Infrared Camera on board the AKARI satellite. To cover the survey area the observations were carried out at three separate seasons from 2006 May to …
Central kinematics of the globular cluster NGC 2808: upper limit on the mass of an intermediate-mass black hole
Kissler-Patig, M.; de Zeeuw, P. T.; Neumayer, N. +5 more
Context. Globular clusters are an excellent laboratory for stellar population and dynamical research. Recent studies have shown that these stellar systems are not as simple as previously assumed. With multiple stellar populations as well as outer rotation and mass segregation they turn out to exhibit high complexity. This includes intermediate-mas…
Triaxial strong-lensing analysis of the z > 0.5 MACS clusters: the mass-concentration relation
Zitrin, Adi; Sereno, Mauro
The high concentrations derived for several strong-lensing clusters present a major inconsistency between theoretical Λ cold dark matter (ΛCDM) expectations and measurements. Triaxiality and orientation biases might be at the origin of this disagreement, as clusters elongated along the line of sight would have a relatively higher projected mass de…
PowellSnakes II: a fast Bayesian approach to discrete object detection in multi-frequency astronomical data sets
Lasenby, A.; Carvalho, Pedro; Rocha, Graça. +1 more
PowellSnakes (PwS) is a Bayesian algorithm for detecting compact objects embedded in a diffuse background, and was selected and successfully employed by the Planck consortium in the production of its first public deliverable: the Early Release Compact Source Catalogue (ERCSC). We present the critical foundations and main directions of further deve…
Near-infrared Variability in Young Stars in Cygnus OB7
Wolk, Scott J.; Aspin, Colin; Rice, Thomas S.
We present the first results from a 124 night J, H, K near-infrared monitoring campaign of the dark cloud L 1003 in Cygnus OB7, an active star-forming region. Using three seasons of UKIRT observations spanning 1.5 years, we obtained high-quality photometry on 9200 stars down to J = 17 mag, with photometric uncertainty better than 0.04 mag. On the …
Sympathetic Filament Eruptions from a Bipolar Helmet Streamer in the Sun
Yang, Bo; Yang, Jiayan; Bi, Yi +3 more
On 2005 August 5, two solar filaments erupted successively from different confined arcades underlying a common overarching multiple-arcade bipolar helmet streamer. We present detailed observations of these two events and identify them as sympathetic filament eruptions. The first (F1) is a small active-region filament located near the outskirts of …
Characterization of hydrated silicate-bearing outcrops in Tyrrhena Terra, Mars: Implications to the alteration history of Mars
Mangold, N.; Bibring, J. -P.; Gondet, B. +7 more
The Tyrrhena Terra region of Mars is studied with the imaging spectrometers OMEGA (Observatoire pour la Minéralogie, l'Eau, les Glaces et l'Activité) onboard Mars Express and CRISM (Compact Reconnaissance Infrared Spectrometer for Mars) onboard Mars Reconnaissance Orbiter, through the observation of tens of craters that impacted into this part of …