Search Publications
The cosmological analysis of X-ray cluster surveys. III. 4D X-ray observable diagrams
Pierre, M.; Faccioli, L.; Clerc, N. +4 more
Context. Despite compelling theoretical arguments, the use of clusters as cosmological probes is, in practice, frequently questioned because of the many uncertainties surrounding cluster-mass estimates.
Aims: Our aim is to develop a fully self-consistent cosmological approach of X-ray cluster surveys, exclusively based on observable quantitie…
Comparison of Solar Fine Structure Observed Simultaneously in Lyα and Mg II h
Auchère, F.; De Pontieu, B.; Schmit, D. +10 more
The Chromospheric Lyman Alpha Spectropolarimeter (CLASP) observed the Sun in H I Lyα during a suborbital rocket flight on 2015 September 3. The Interface Region Imaging Telescope (IRIS) coordinated with the CLASP observations and recorded nearly simultaneous and co-spatial observations in the Mg II h and k lines. The Mg II h and Lyα lines are impo…
The reflectivity of Mars at 1064 nm: Derivation from Mars Orbiter Laser Altimeter data and application to climatology and meteorology
Heavens, N. G.
The Mars Orbiter Laser Altimeter (MOLA) on board Mars Global Surveyor (MGS) made > 108 measurements of the reflectivity of Mars at 1064 nm (R1064) by both active sounding and passive radiometry. Past studies of R1064 neglected the effects of atmospheric opacity and viewing geometry on both active and passive mea…
Polarization Characteristics of Zebra Patterns in Type IV Solar Radio Bursts
Misawa, H.; Masuda, S.; Tsuchiya, F. +4 more
The polarization characteristics of zebra patterns (ZPs) in type IV solar bursts were studied. We analyzed 21 ZP events observed by the Assembly of Metric-band Aperture Telescope and Real-time Analysis System between 2010 and 2015 and identified the following characteristics: a degree of circular polarization (DCP) in the range of 0%-70%, a tempor…
Spectroscopic confirmation of the low-latitude object FSR 1716 as an old globular cluster
Kunder, Andrea; Wojno, Jennifer; Koch, Andreas
Star clusters are invaluable tracers of the Galactic components and the discovery and characterization of low-mass stellar systems can be used to appraise their prevailing disruption mechanisms and time scales. However, owing to significant foreground contamination, high extinction, and still uncharted interfaces of the underlying Milky Way compon…
Diamagnetic depression observations at Saturn's magnetospheric cusp by the Cassini spacecraft
Coates, Andrew J.; Krupp, Norbert; Arridge, Christopher S. +4 more
The magnetospheric cusp is a region where shocked solar wind plasma can enter a planetary magnetosphere, after magnetic reconnection has occurred at the dayside magnetopause or in the lobes. The dense plasma that enters the high-latitude magnetosphere creates diamagnetic effects whereby a depression is observed in the magnetic field. We present ob…
Discovery of a 150 day period in the Venus condensational clouds
Tsang, Constantine C. C.; McGouldrick, Kevin
We have analyzed the long-term regional and global variation of emitted radiance in 1.74 µ m and 2.30 µ m near infrared spectral windows in the Venus atmosphere using the medium resolution, infrared channel of the Visible and Infrared Thermal Imaging Spectrometer (VIRTIS-M-IR) on the Venus Express spacecraft. We find a periodic variati…
Radio and X-ray properties of the source G29.37+0.1 linked to HESS J1844-030
Giacani, E.; Castelletti, G.; Petriella, A. +2 more
Aims: We report on the first detailed multiwavelength study of the radio source G29.37+0.1, which is an as-yet-unclassified object linked to the very-high-energy γ-emitting source HESS J1844-030. The origin of the multiwavelength emission toward G29.37+0.1 has not been clarified so far, leaving open the question about the physical relationshi…
Observation of a Large-scale Quasi-circular Secondary Ribbon Associated with Successive Flares and a Halo CME
Yurchyshyn, Vasyl; Chae, Jongchul; Cho, Kyuhyoun +7 more
Solar flare ribbons provide an important clue to the magnetic reconnection process and associated magnetic field topology in the solar corona. We detected a large-scale secondary flare ribbon of a circular shape that developed in association with two successive M-class flares and one coronal mass ejection. The ribbon revealed interesting propertie…
A New 3D Multi-fluid Dust Model: A Study of the Effects of Activity and Nucleus Rotation on Dust Grain Behavior at Comet 67P/Churyumov-Gerasimenko
Huang, Z.; Jia, X.; Fougere, N. +7 more
Improving our capability to interpret observations of cometary dust is necessary to deepen our understanding of the role of dust in the formation of comets and in altering the cometary environments. Models including dust grains are in demand to interpret observations and test hypotheses. Several existing models have taken into account the gas-dust…