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Momentum transfer at the high-latitude magnetopause and boundary layers
Farrugia, C. J.; Lund, E. J.; Sandholt, P. E.
Vertical Properties of the Global Haze on Titan Deduced from Methane Band Spectroscopy Between 7100 and 9200 Å
Sim, Chae-Kyung; Kim, Sang-Joon; Kim, Joo-Hyeon +3 more
Star Clusters in the Nearby Late-Type Galaxy NGC 1311
de Grijs, Richard; Windhorst, Rogier A.; Eskridge, Paul B. +3 more
Ultraviolet, optical and near-infrared images of the nearby (D ≈ 5.5 Mpc) SBm galaxy NGC 1311, obtained with the Hubble Space Telescope, reveal a small population of 13 candidate star clusters. We identify candidate star clusters based on a combination of their luminosity, extent, and spectral energy distribution. The masses of the cluster candida…
On the Doppler navigation of a small body orbiter: Rosetta
Mysen, E.; Aksnes, K.
In 2014 the ESA probe Rosetta is to rendezvous with short-period comet 67P/Churyumov-Gerasimenko, where it will be inserted into a stable bound orbit. Partly by measuring the Doppler displacements of the probe's radio carrier waves, the gravity field of the comet's nucleus will be found. In this work, navigation strategies are developed, and impor…
Ground-based astrometric observations of latitude for improved reference frame
Damljanović, Goran
The Commission 19 (Earth Rotation) of the International Astronomical Union - IAU established the Working Group on Earth Rotation in the Hipparcos Reference Frame - WG ERHRF at 1995 to collect the optical observations of latitude and universal time variations, made during 1899.7-1992.0 in line with Earth orientation programmes (to derive Earth Orie…
Results and perspectives of young stellar object long look programs
Sciortino, S.
Both Chandra and XMM-Newton have performed long look programs for studying the YSO physics. I will discuss recent results on the controversial issue of Class 0 YSO X-ray emission, the observational evidence of magnetic funnels interconnecting the YSO with its circumstellar disk and the Fe 6.4 keV fluorescent line emission and its origin. While rec…
Simulation of zonal flow excitation by drift mode turbulence: applications to tokamaks and the magnetopause
Davies, J. A.; Vaivads, A.; Dunlop, M. W. +5 more
Recently, we investigated the interaction between broadband drift mode turbulence and zonal flows near the edge of a region of magnetized plasma (Trines et al 2005 Phys. Rev. Lett. 94 165002). Our simulation results showed the development of a zonal flow through the modulational instability of the drift wave distribution, as well as the existence …
The XMM-LSS cluster sample and its cosmological applications: Prospects for the XMM next decade
Pierre, M.; Pacaud, F.; Melin, J. B. +1 more
The well defined selection function of the XMM-LSS surveys enables a simultaneous modelling of the observed cluster number counts and of the evolution of the L_X-T_X relation. We present results pertaining to the first 5 deg2 for a well controlled sample comprising 30 objects: they are compatible with the WMAP3 parameter set along with …
Variations of the parameters of the dust envelope of the symbiotic star CH Cygni
Bogdanov, M. B.; Taranova, O. G.
The results of JHKLM photometry of the symbiotic star CH Cyg are presented. These demonstrate that, in Autumn 2006, the state of maximum near-IR brightness observed in 2003 2006 was replaced by a sharp brightness decline in all wavebands. One possible explanation is a sharp increase in the density of circumstellar dust envelope. The JHKLM photomet…
Reduction of photographic observations of asteroids to the reference frame of a single catalog
Chernetenko, Yu. A.
In 2000, the last international program of photographic observations of selected asteroids aimed at the determination of the mutual orientation of the dynamic and stellar coordinate systems came to an end. The Institute of Applied Astronomy of the Russian Academy of Sciences collected more than 25 000 observations for 15 asteroids spanning from 19…