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Spectrophotometry of nine stars with planets
Tereschenko, V. M.
The energy distributions in the spectra of nine stars with planets were obtained from observations. The synthetic colour indices in the photometric UBV, WBVR and the Tycho catalogue systems were calculated on the basis of observations. The effective temperatures and metallicities of the investigated stars were determined by comparing the calculate…
Spatial distribution of energetic ion compositions in the plasma sheet observed by Cluster/RAPID
Ruan, P.; Daly, P.; Wang, Y. +4 more
Rosetta space mission to Comet 67P/Churyumov--Gerasimenko
Churyumov, K. I.
We present preliminary results of study of middle-resolution optical spectra of Comet 153P/Ikeya--Zhang obtained on May 5, 2002 with the help of the 2.12-m reflector of the Guillermo Haro Astrophysical Observatory. Emission lines of the molecules C2, C3, CN, NH2, CO (Asundi and triplet bands), and H2O
XMM-Newton observation of Vela shrapnel D
Katsuda, Satoru; Tsunemi, Hiroshi
The ROSAT all-sky survey discovered several 'shrapnels', showing boomerang structures outside the Vela SNR. We observed the shrapnel D in the eastern limb of the Vela SNR with the XMM-Newton satellite. There is an X-ray bright ridge structure in our FOV running from north to south. There is also an optical bright ridge structure running parallel t…
Towards an Understanding of Radial Velocity Shift in Uv Spectra of Symbiotic Stars
Friedjung, Michael; Mikołajewska, Joanna
A systematic redshift of high ionization resonance emission lines relative to the intercombination lines was found by Friedjung et al. (1883, A & A126, 4071983) in the UV spectra of a number of symbiotic binaries. The interpretation was not then clear. We present a study of archival IUE and GHRS/HST spectra of the symbiotic binary CI Cyg. The …
Solution of Earth orientation parameters in the frame of new Earth Orientation Catalogue
Vondr'ak, J.; Ron, C.
The new Earth Orientation Catalogue was recently derived, based mostly on the ARIHIP and Tycho-2 Catalogues that were combined with ground-based optical observations of latitude and Universal Time variations in the 20th century. The solution of Earth orientation parameters, based on this new star catalogue and the new IAU model of precession-nutat…
All-sky census of galactic open cluster stars
Piskunov, A. E.; Kharchenko, N. V.; Scholz, R. D. +2 more
We present the results of a systematic study of the wider neighbourhoods of 520 Galactic open clusters from data of the all-sky high-precision homogeneous catalogue ASCC-2.5. About 30,000 members have been selected on the basis of proper motion, photometric and spatial criteria. Angular and linear sizes of cluster cores and coronas, mean cluster p…
Observation of a substorm onset on 12 September 2001
Balogh, A.; Dandouras, I.; Thomsen, M. +4 more
The orbits of Polar and Cluster spacecraft in 2001-2003 are extremely well suited to investigate substorms. Here, we discuss a substorm onset on 12 September 2001 between 1800 and 1915 UT. At this time, the Polar spacecraft was at 8 Re, 0034 LT, 70° invariant latitude (IL) and the Cluster spacecraft was at 19.3 Re, 2330 LT, 77° IL. The geostationa…
Shock parameter calculations at weak interplanetary shock waves
Balogh, A.; Gloag, J. M.
A large set of interplanetary shock waves observed using the Ulysses spacecraft is analysed in order to determine their local parameters. For the first time a detailed analysis is extended to the thermodynamic properties of a large number of events. The intention is to relate the shock parameters to the requirements set by MHD shock theory. A unif…
Multi-phase interstellar clouds in the Vela SNR resolved with XMM-Newton
Miceli, M.; Bocchino, F.; Reale, F. +1 more
XMM-Newton spatial/spectral resolution and high effective area allow to deepen our knowledge about the shocks in Supernova Remnants and their interaction with the interstellar medium. We present the analysis of an EPIC observation of the northern rim of the Vela SNR and we compare the X-ray and optical morphology of the emission. We derive a descr…