The impact of cooling flows on the T X − L Bol relation for the most X-ray luminous clusters. ABSTRACT We examine the effects of cooling flows on the T X − L Bol relation for a sample of the most X-ray luminous (L Bol > 10 45 erg s −1) clusters of galaxies known. Using high-quality ASCA X-ray spectra and ROSAT images we explicitly account for the effects of cooling flows on the X-ray properties...

We have obtained for the first time K-band infrared spectra of the soft X-ray transient V616 Mon (=A0620–00). We determine the 2-σ upper limit to the fraction of light arising from the accretion disc to be 27 percent. The effect this has on the binary inclination, determined from modelling the infrared ellipsoidal variations is to increase it by less than 7 degrees and decrease the mass of the ...

We have obtained for the first time K-band infrared spectra of the soft X-ray transient V616 Mon (=A0620–00). We determine the 2-σ upper limit to the fraction of light arising from the accretion disc to be 27 percent. The effect this has on the binary inclination, determined from modelling the infrared ellipsoidal variations is to increase it by less than 7 degrees and decrease the mass of the ...

An original processing route by powder metallurgy was developped to alloy pure Ni foams so, that the foam becomes refractory for high temperature applications. The modelling of such a foam at high temperature starts from the behavior of the basic constitutive material, then we use micromechanical models to predict the mechanical properties under tension and in compression creep. A 3D finite ele...

The impact of cooling flows on the T X − L Bol relation for the most luminous clusters. ABSTRACT We examine the effects of cooling flows on the T X − L Bol relation for a sample of the most X-ray luminous (L Bol > 10 45 erg s −1) clusters of galaxies known. Using high-quality ASCA X-ray spectra and ROSAT images we explicitly account for the effects of cooling flows on the X-ray properties of th...

Scattering by interstellar dust grains can produce time variable X-ray halos around gamma-ray bursts (GRB). In particular, an X-ray expanding ring is expected when a short pulse of X-ray radiation is scattered by a narrow layer of dust in our Galaxy. We present a new method to detect and analyze dust scattering expanding rings around gamma-ray bursts, using as an example XMM-Newton data of GRB ...

Statistical descriptors of the X-ray diffraction data set for a macromolecular crystal can be modelled using the information present in the initial diffraction images. Quantitative relationships between the crystal quality, beam apertures, oscillation width, resolution limit, redundancy and the data statistics are presented. They are analysed in terms of the radiation-dose requirements based on...

Amino alcohols have been used to introduce non-racemic chirality into macrocycles using a modular approach that relies on a Heck macrocyclisation reaction. A wide variety of macrocycles have been synthesised, and their structures studied using X-ray crystallography and molecular modelling. A fragmentation reaction encountered during the use of (S)-1,1-dimethylvalinol revealed that carboxylic ac...

In this paper, we propose a new method of morphology classification considering the building height, density, etc. The characteristics of path loss, delay spread(DS), angular spread(AS) of Angle of Departure(AoD) and Angle of Arrival(AoA) for each morphology were investigated by analyzing the simulation results obtained by the ray-tracing technique and a statistical modelling of the building di...

Our understanding of crystal growth continues to increase thanks to progress in theoretical models, computer simulations and experimental techniques. A discussion of the state-of-the-art in morphology prediction and of the determination of the solid-liquid interface structure using X-ray diffraction shows, however, that there is still a large gap between experiment and theory. We expect that co...