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Rosetta observes sublimating surface ices
Smith, Keith T.
Revisiting the Single-Fluid Modeling of the Solar Wind–Comet Interaction: Closer Look at the Cometosheath
Dryer, M.; Kartalev, M.; Keremidarska, V.
Earlier developed single fluid gas-dynamic model of solar wind–comet ionosphere interaction is applied to reveal some specifics in the morphology of the shocked "contaminated" solar wind region (cometosheath). The model is based on the Euler equations with added mass-loading, mass-loss and frictional force terms. Numerous reactions are taken into …
An Optimised System for Generating Multi-Resolution Dtms Using NASA Mro Datasets
Tao, Y.; Muller, J. -P.; Sidiropoulos, P. +2 more
Within the EU FP-7 iMars project, a fully automated multi-resolution DTM processing chain, called Co-registration ASP-Gotcha Optimised (CASP-GO) has been developed, based on the open source NASA Ames Stereo Pipeline (ASP). CASP-GO includes tiepoint based multi-resolution image co-registration and an adaptive least squares correlation-based sub-pix…
Discovery of a deep Seyfert-2 galaxy at z = 0.222 behind NGC 300
Gamen, R.; Combi, J. A.; García, F. +2 more
We report on the unveiling of the nature of the unidentified X-ray source 3XMM J005450.3-373849 as a Seyfert-2 galaxy located behind the spiral galaxy NGC 300 using Hubble Space Telescope data, new spectroscopic Gemini observations and available XMM-Newton and Chandra data. We show that the X-ray source is positionally coincident with an extended …
The nature of X-ray selected star candidates
Gigoyan, K. S.; Kostandyan, G. R.; Mickaelian, A. M. +3 more
The joint HRC/BHRC catalogue of optical identifications of ROSAT BSC and FSC X-ray sources is based on merging the Hamburg-ROSAT Catalogue (HRC) and Byurakan-Hamburg-ROSAT Catalogue (BHRC). Both have been made by optical identifications of X-ray sources based on low-dispersion spectra of the Hamburg QuasarSurvey (HQS) using the ROSAT Catalogues. H…
Total infrared luminosity estimation from local galaxies in AKARI all sky survey (Corrigendum)
Takeuchi, T. T.; Pollo, A.; Solarz, A.
Possible signature of solar oblateness in the Sun's oscillation frequency splittings
Woodard, M. F.
Departures from spherical symmetry split the frequencies of the Sun's normal oscillation modes. In addition to the well-studied, dominant splitting of the mode frequencies, due to the first-order advection of internal wave motion, a number of second-order effects of rotation on the frequency splittings, predominantly the solar oblateness, are expe…
Unusual objects in the spiral galaxy NGC 6946
Efremov, Yu. N.
Several strange objects in the spiral galaxy NGC 6946 are described. One of these objects is the giant stellar complex noted long ago; we suggested that its sharp semicircular western edge is a result of the ram pressure, arising owing to motion of this complex through the H I halo of NGC 6946. We found another enigmatic object, proposing for it t…
Sharp Chandra View of ROSAT All-Sky Survey Bright Sources — I. Improvement of Positional Accuracy
Wang, Song; Liu, Ji-Feng; Gao, Shuang
The ROSAT All-Sky Survey (RASS) represents one of the most complete and sensitive soft X-ray all-sky surveys to date. However, the deficient positional accuracy of the RASS Bright Source Catalog (BSC) and subsequent lack of firm optical identifications affect multi-wavelength studies of X-ray sources. The widely used positional errors σpos
Is the Line-like Optical Afterglow SED of GRB 050709 Due to a Flare?
Jin, Zhi-Ping; Wei, Da-Ming; Liu, Cong
Recently, Jin et al. reanalyzed the optical observation data of GRB 050709 and reported a line-like spectral energy distribution (SED) component observed by the Very Large Telescope at t ∼ 2.5 days after the trigger of the burst, which had been interpreted as a broadened line signal arising from a macronova dominated by an iron group. In this work…