Search Publications
Magnetospheric ULF wave studies in the frame of Swarm mission: a time-frequency analysis tool for automated detection of pulsations in magnetic and electric field observations
Daglis, Ioannis A.; Balasis, Georgios; Papadimitriou, Constantinos +2 more
We combine the advantages of multi-spacecraft and ground-based monitoring of the geospace environment in order to analyze and study magnetospheric ultra low frequency (ULF) waves. In line with this aim, we also develop and deliver relevant analysis tools based on wavelet transforms and tailored to the Swarm mission. In the preparation phase as wel…
Dust and spacecraft charging in Saturn's E ring
Kempf, Sascha; Horányi, Mihály; Hsu, Hsiang-Wen
The electrostatic potential of a spacecraft reflects the local physical conditions and also affects the in situ thermal plasma measurements. In this work we focus on the spacecraft charging in the high dust density region near Enceladus in Saturn's E ring. In a dust-rich environment, the spacecraft charging is modified by the complex (dusty) plasm…
Far-ultraviolet and far-infrared bivariate luminosity function of galaxies: Complex relation between stellar and dust emission
Buat, Véronique; Burgarella, Denis; Takeuchi, Tsutomu T. +2 more
Far-ultraviolet (FUV) and far-infrared (FIR) luminosity functions (LFs) of galaxies show a strong evolution from z = 0 to z = 1, but the FIR LF evolves much stronger than the FUV one. The FUV is dominantly radiated from newly-formed short-lived OB stars, while the FIR is emitted by dust grains heated by the FUV radiation field. It is known that du…
Dusty Universe viewed by AKARI far infrared detector
Buat, V.; Małek, K.; Burgarella, D. +5 more
We present the results of the analysis of multiwavelength Spectral Energy Distributions (SEDs) of far-infrared galaxies detected in the AKARI Deep Field-South (ADF-S) Survey. The analysis uses a carefully selected sample of 186 sources detected at the 90 µm AKARI band, identified as galaxies with cross-identification in public catalogues. Fo…
Clustering of far-infrared galaxies in the AKARI All-Sky Survey North
Oyabu, S.; Takeuchi, T. T.; Pollo, A. +4 more
We present the measurements of the angular two-point correlation function for AKARI 90-µm point sources, detected outside the Milky Way plane and other regions characterized by high Galactic extinction in the northern Galactic hemisphere, and categorized as extragalactic sources according to our far-infrared-color based criterion. Together w…
Clustering of far-infrared galaxies in the AKARI All-Sky Survey
Oyabu, S.; Takeuchi, T. T.; Pollo, A. +1 more
We present the first measurement of the angular two-point correlation function for AKARI 90-µm point sources, detected outside of the Milky Way plane and other regions characterized by high Galactic extinction, and categorized as extragalactic sources according to our far-infrared-color based criterion (Pollo et al., 2010). This is the first…
Toward generalized planetary stereo analysis scheme—Prototype implementation with multi-resolution Martian stereo imagery
Kim, Jung-Rack; Lin, Shih-Yuan; Kim, Young-Hwi +1 more
Stereo analysis of orbital imagery is highly valuable for scientific research in planetary surface. Thus, the processing of planetary stereo imagery has been progressed with various approaches and resulted in a series of uncontrolled topographic products. In order to fully utilize the data derived from image systems carried on various planetary or…
Star formation and dust extinction properties of local galaxies as seen from AKARI and GALEX
Buat, V.; Burgarella, D.; Takeuchi, T. T. +2 more
An accurate estimation of the star formation-related properties of galaxies is crucial for understanding the evolution of galaxies. In galaxies, ultraviolet (UV) light emitted by recently formed massive stars is attenuated by dust, which is also produced by star formation (SF) activity, and is re-emitted at mid- and far- infrared (IR) wavelengths.…
Dust attenuation in galaxies up to redshift ≃ 2
Buat, V.
We want to study dust attenuation at ultraviolet (UV) wavelengths at high redshift, where the UV is redshifted to the observed visible light wavelength range. In particular, we search for a bump at 2175 Å. We use photometric data in the Chandra Deep Field South (CDFS), obtained in intermediate and broad band filters by the MUSYC project, to sample…
Doppler shift and broadening in solar wind turbulence
Glassmeier, K. -H.; Narita, Y.; Motschmann, U. +1 more
We propose a method to evaluate the Doppler shift and broadening using magnetic field data in solar wind turbulence. A model of the energy spectrum is constructed in the wavenumber-frequency domain in the direction of the mean flow, and it is compared with that determined directly from four-point magnetic field data of Cluster spacecraft using the…