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Warm-hot intergalactic medium contribution to baryonic matter

Sołtan, A. M.

Context: .Hydrodynamical simulations indicate that a substantial fraction of baryons in the universe remains in a diffuse component - warm-hot intergalactic medium (WHIM).
Aims: .The goal of this paper is to determine the physical properties (spatial distribution, temperature, and density) of the WHIM.
Methods: .Spatial structure of the so…

Supersoft sources in XMM-Newton Small Magellanic Cloud fields. A symbiotic and a close binary or cooling neutron star

Haberl, F.; Kahabka, P.

We report the detection and study of two faint ROSAT supersoft X-ray sources in the SMC field with XMM-Newton, RX J0059.1-7505 and RX J0059.4-7118. Due to the larger effective area of XMM-Newton we can constrain the X-ray spectra of both sources. RX J0059.1-7505 is optically identified with the symbiotic LIN 358 in the SMC. A 20 eV blackbody compo…

Physical properties of Titan's surface at the Huygens landing site from the Surface Science Package Acoustic Properties sensor (API-S)

Lorenz, R. D.; Hagermann, A.; Leese, M. R. +6 more

We present the results from the first sonar to be deployed outside of Earth, and the first active acoustic instrument on Titan, onboard the Huygens probe, and the implications of its data for the geomorphology and characteristics of the Huygens landing site. Signals were recorded from 90 m downwards until impact, with a maximum sensor footprint di…

ASPERA-3 on Mars Express

Barabash, Stas; Lundin, Rickard

The Correlation Dimension of Young Stars in Dwarf Galaxies

Odekon, Mary Crone

We present the correlation dimension of resolved young stars in four actively star-forming dwarf galaxies that are sufficiently resolved and transparent to be modeled as projections of three-dimensional point distributions. We use data from the Hubble Space Telescope archive; photometry for one of the galaxies, UGCA 292, is presented here for the …

Mass segregation in rich LMC clusters from modelling of deep HST colour-magnitude diagrams

Santiago, B. X.; Kerber, L. O.

Aims.We used the deep colour-magnitude diagrams (CMDs) of five rich LMC clusters (NGC 1805, NGC 1818, NGC 1831, NGC 1868, and Hodge 14) observed with HST/WFPC2 to derive their present day mass function (PDMF) and its variation with position within the cluster.
Methods: .The PDMF was parameterized as a power law in the available main-sequence …

Are high-latitude forward-reverse shock pairs driven by CME overexpansion?

Zurbuchen, T. H.; Manchester, W. B.

During its passage through the high-latitude heliosphere, Ulysses observed interplanetary coronal mass ejections (ICMEs) bounded by shocks. These forward-reverse shock pairs have only been observed at high latitude in the fast solar wind. It has been suggested (e.g., Gosling et al., 1995) that these shock pairs are the result of expansion of coron…

The planetary fourier spectrometer (PFS) onboard the European Venus Express mission

Baines, K. H.; Grigoriev, A.; Bellucci, G. +47 more

The planetary fourier spectrometer (PFS) for the Venus Express mission is an infrared spectrometer optimized for atmospheric studies. This instrument has a short wavelength (SW) channel that covers the spectral range from 1700 to 11400 cm ^-1 (0.9-5.5 µm) and a long wavelength (LW) channel that covers 250-1700 cm ^-1 (5.5…

Analysis of δ Librae including Hipparcos astrometry

Demircan, O.; Bakış, V.; Hadrava, P. +3 more

New spectroscopy of the classical Algol system δ Lib, combined with high-quality optical and infrared photometry, provides the basis for a good understanding of the close binary system's main parameters. Detailed analysis of the photometry reveals the significant role of a third light source, pointing to the existence of a companion to the eclipsi…

NRLEUV 2: A new model of solar EUV irradiance variability

Warren, Harry P.

NRLEUV represents an independent approach to modeling the Sun's EUV irradiance and its variability. Instead of relying on existing irradiance observations, our model utilizes differential emission measure distributions derived from spatially and spectrally resolved solar observations, full-disk solar images, and a database of atomic physics parame…