Search Publications
The Hubble Deep Field North SCUBA Super-map - II. Multiwavelength properties
Nandra, Kirpal; Halpern, Mark; Chapman, Scott +3 more
We present radio, optical and X-ray-detected counterparts to the submillimetre sources found using SCUBA in the Hubble Deep Field North region (GOODS-N). A new counterpart identification statistic is developed to identify properties of galaxies detected at other wavelengths that can be used to aid counterpart identification. We discriminate betwee…
On the network structures in solar equatorial coronal holes. Observations of SUMER and MDI on SOHO
Wilhelm, K.; Marsch, E.; Xia, L. D.
By combining observations of the Sun made by SUMER and MDI aboard SOHO, the network structures in equatorial coronal holes have been studied, in particular the relationship between the ultraviolet emission-line parameters (line radiance, Doppler shift and line width) and the underlying magnetic field. The bases of coronal holes seen in chromospher…
First observation of Jupiter by XMM-Newton
Branduardi-Raymont, G.; Soria, R.; Ramsay, G. +4 more
We present the first X-ray observation of Jupiter by XMM-Newton. Images taken with the EPIC cameras show prominent emission, essentially all confined to the 0.2-2.0 keV band, from the planet's auroral spots; their spectra can be modelled with a combination of unresolved emission lines of highly ionised oxygen (OVII and OVIII), and a pseudo-continu…
Organic matter in Seyfert 2 nuclei: Comparison with our Galactic center lines of sight
Dartois, E.; d'Hendecourt, L.; Marco, O. +3 more
We present ESO - Very Large Telescope and ESA - Infrared Space Observatory 3 to 4 µm spectra of Seyfert 2 nuclei as compared to our galactic center lines of sight. The diffuse interstellar medium probed in both environments displays the characteristic 3.4 µm aliphatic CH stretch absorptions of refractory carbonaceous material. The prof…
About the rotation of the solar radiative interior
Henney, C. J.; Howe, R.; Eff-Darwich, A. +13 more
In the modern era of helioseismology we have a wealth of high-quality data available, e.g., more than 6 years of data collected by the various instruments on board the SOHO mission, and an even more extensive ground-based set of observations covering a full solar cycle. Thanks to this effort a detailed picture of the internal rotation of the Sun h…
Abundance analysis of targets for the COROT/MONS asteroseismology missions. II. Abundance analysis of the COROT main targets
Magain, P.; Catala, C.; Bikmaev, I. F. +13 more
One of the goals of the ground-based support program for the COROT and MONS/RÖMER satellite missions is to characterize suitable target stars for the part of the missions dedicated to asteroseismology. We present the detailed abundance analysis of nine of the potential COROT main targets using the semi-automatic software VWA. For two additional CO…
Comparison between KPVT/SPM and SoHO/MDI magnetograms with an application to solar irradiance reconstructions
Solanki, S. K.; Krivova, N. A.; Wenzler, T. +1 more
To be able to use both space- and ground-based solar magnetograms and construct long time series of derived parameters it is important to cross-calibrate them so that we can estimate their reliability and combine them. Using two different techniques, we compare magnetograms as well as continuum images recorded by the Spectropolarimeter (SPM) on Ki…
Monte Carlo simulations of the halo white dwarf population
Burkert, A.; Torres, S.; Isern, J. +1 more
The interpretation of microlensing results towards the Large Magellanic Cloud (LMC) still remains controversial. While white dwarfs have been proposed to explain these results and, hence, to contribute significantly to the mass budget of our Galaxy, there are also several constraints on the role played by white dwarfs. In this paper we analyze sel…
Kinetic parameters of interstellar neutral helium: updated results from the ULYSSES/GAS-instrument
Rosenbauer, H.; Witte, M.; Banaszkiewicz, M. +1 more
The GAS-instrument onboard the space probe ULYSSES (ULS) is designed to measure the local angular distribution of the flow of interstellar neutral He-atoms within ≈3 AU distance from the sun; it allows to infer the kinetic parameters (velocity vector, temperature and density) of these particles outside the heliosphere ("at infinity"). Around the s…
A Chandra View of the Morphological and Spectral Evolution of Supernova Remnant 1987A
Zhekov, Svetozar A.; Garmire, Gordon P.; Park, Sangwook +2 more
We present an update on the results of our monitoring observations of the X-ray remnant of supernova (SN) 1987A with Chandra. As of 2002 December, we have performed a total of seven observations of SN 1987A, which allows us to monitor the details of the earliest stage of the supernova remnant evolution in X-rays. The high angular resolution images…