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AKARI Infrared Camera Survey of the Large Magellanic Cloud
Onaka, T.; Ita, Y.; Kato, D. +2 more
We conducted an unbiased near- to mid-infrared imaging and spectroscopic survey of the Large Magellanic Cloud (LMC) as a part of the AKARI Mission Program "Large-area Survey of the LMC" (LSLMC, PI: T. Onaka). An area of about 10 square degrees of the LMC was observed by five photometric bands (3.2, 7, 11, 15, and 24 µm) and a low-resolution …
Dawn-Dusk Asymmetries of Ionospheric Outflow
Wei, Y.; Daly, P. W.; André, M. +3 more
Unveiling the physics of AGN through X-ray variability
González-Martín, O.; Márquez, I.; Masegosa, J. +1 more
Although variability is a general property characterizing active galactic nuclei (AGN), it is not well established whether the changes occur in the same way in every nuclei. The main purpose of this work is to study the X-ray variability pattern(s) in AGN selected at optical wavelengths in a large sample, including low ionization nuclear emission …
IR photometry results and dust envelope model for symbiotic Mira star candidate V 335 Vul
Bogdanov, M. B.; Taranova, O. G.; Shenavrin, V. I.
We present the results of JHKLM-photometry for the symbiotic Mira star candidate V 335 Vul. Based on the average flux data, supplemented by IRAS, MSX, AKARI, and WISE mid-IR observations, we calculated a model of a spherically symmetric dust envelope of the star, made up of amorphous carbon and silicon carbide particles. The optical depth of the e…
Akari-Nep : Effects of AGN Presence on SFR Estimates of Galaxies
Berta, S.; Rodighiero, G.; White, G. J. +11 more
Recursive Range Estimation Using Astrophysical Signals of Opportunity
Runnels, Joel T.; Gebre-Egziabher, Demoz
Effects of the convective field on weakly outgassing comets
Galand, M.; Beth, A.
By applying a kinetic approach, we have developed two models in order to assess the influence of one main driver of plasma acceleration, the convective electric field, on the cometary ion distribution at 67P/Churyumov-Gerasimenko (67P/C-G). This electric field is carried by the solar wind and corresponds to the acceleration undergone by cometary i…
La poussiere cosmique
Rotundi, Alessandra
Since the 1970s, dust has been collected in the terrestrial environment in the hope of studying dust particles witnessing the primordial protoplanetary nebula materials. In the 21th century, cometary dust was collected by the Stardust/NASA probe in the coma of comet 81P/Wild-2 and returned to Earth. Cometary dust was also analyzed in situ by Roset…
News on the X-ray emission from hot subdwarf stars
Mereghetti, Sandro; Palombara, Nicola La
In latest years, the high sensitivity of the instruments on-board the XMM-Newton and Chandra satellites allowed us to explore the properties of the X-ray emission from hot subdwarf stars. The small but growing sample of X-ray detected hot subdwarfs includes binary systems, in which the X-ray emission is due to wind accretion onto a compact compani…
The evolution of geomagnetotail magnetic flux in isolated substorms
Dunlop, M.; Rong, Z. J.; Shen, C. +4 more
The magnetic field energy stored in geomagnetotail released during a substorm period, cause significant magnetic disturbance of the space environment. The quantitative relationship between the magnetic field energy and the level of substorm activity, however, is still unclear, although many studies have qualitatively revealed the correlation betwe…