Incorporating the effect of mass-stripping and accretion-disk instability onthe evolution of WD binary, we carried out binary stellar evolutioncalculations for more than 1600 close WD binaries. As a result, the initialparameter spaces for SNe Ia are presented in an orbital

We perform ideal-magnetohydrodynamic axisymmetric simulations of magneticallyconfined mountains on an accreting neutron star, with masses less than ~0.12solar masses. We consider two scenarios, in which the mountain sits atop a hardsurface or sinks into a soft, fluid base. We find

Different shapes of the nuclear symmetry energy leads to a differentcrust-core transition point in the neutron star. The basic properties of acrust, like thickness, mass and moment of inertia were investigated for variousforms of the symmetry energy.

The recently discovered planetary system HD45364 which consists of a Jupiterand Saturn mass planet is very likely in a 3:2 mean motion resonance. Thestandard scenario to form planetary commensurabilities is convergent migrationof two planets embedded in a protoplanetary disc. When

Theoretical background of our proposed relation between the acceleratinguniverse and the time-variability of the fine-structure constant is discussed,based on the scalar-tensor theory, with emphases on the intuitive aspects ofunderlying physical principles. An important comment is added on the successfulunderstanding of

Whether caused by AGN jets, shocks, or mergers, the most definitive evidencefor heating in cluster cores comes from X-ray spectroscopy. Unfortunately suchspectra are essentially limited to studying the emission spectrum from thecluster as a whole. However since the same underlying

The recent release of the first light sky map of the cosmic microwavebackground (CMB) from the Planck satellite provides an initial opportunity forcomparison with the WMAP and COBE sky maps and their reconstruction algorithms.The images appear to match well at

We present a statistical study on parsec scale properties of a sample ofBrigthest Cluster Galaxies (BCGs) in Abell Clusters. These data show a possibledifference between BCGs in cool core clusters (two-sided parsec scale jets) andin non cool core clusters (one-sided

The formation of planets within a disc must operate within the time frame ofdisc dispersal, it is thus crucial to establish what is the dominant processthat disperses the gaseous component of discs around young stars. Planetformation itself as well as

Aims.Recently a new analysis of cluster observations in the Milky Way foundevidence that clustered star formation may work under tight constraints withrespect to cluster size and density, implying the presence of just twosequences of young massive cluster. These two types

Cosmology contributes a good deal to the investigation of variation offundamental physical constants. High resolution data is available and allowsfor detailed analysis over cosmological distances and a multitude of methodswere developed. The raised demand for precision requires a deep understandingof

We present a study of an extended Lyman-alpha (Lya) nebula located in a knownoverdensity at z~2.38. The data include multiwavelength photometry covering therest-frame spectral range from 0.1 to 250um, and deep optical spectra of thesources associated with the extended emission.

We measure shifts of the acoustic scale due to nonlinear growth and redshiftdistortions to a high precision using a very large volume ofhigh-force-resolution simulations. We compare results from various sets ofsimulations that differ in their force, volume, and mass resolution.

Baryon acoustic oscillations (BAO) provide a robust standard ruler with whichto measure the acceleration of the Universe. The BAO feature has so far beendetected in optical galaxy surveys. Intensity mapping of neutral hydrogenemission with a ground-based radio telescope provides another

Measurements of small-scale turbulent fluctuations in the solar wind find anon-zero right-handed magnetic helicity. This has been interpreted as evidencefor ion cyclotron damping. However, theoretical and empirical evidence suggeststhat the majority of the energy in solar wind turbulence resides in

Galaxy clusters are the most massive virialized objects in the universe and,as such, are extensively used as cosmological probes. The clusters are usuallyassumed to be relaxed, spherical, and isothermal to simplify the analyses. Themost x-ray luminous cluster known, RXJ1347-1145 (z=0.45),

B2352+495 is a prototypical example of a Compact Symmetric Object (CSO). Ithas a double radio lobe symmetrically located with respect to a central flatspectrum radio core (the location of the AGN) and has a physical extent of lessthan 200 pc.

The MACHO Project generated two-colour photometric lightcurves for 73 millionstars in the LMC, SMC, and the Galactic bulge during its 8 years of observing.This photometry, along with all images from the over 100 thousand observationsfrom which it was derived, and

In this article we identify and discuss various statistical and systematiceffects influencing the astrometric accuracy achievable with MICADO, thenear-infrared imaging camera proposed for the 42-metre European Extremely LargeTelescope (E-ELT). These effects are instrumental (e.g. geometric distortion),atmospheric (e.g. chromatic differential refraction),

We investigate the number and type of pulsars that will be discovered withthe low-frequency radio telescope LOFAR. We consider different searchstrategies for the Galaxy, for globular clusters and for other galaxies. Weshow that a 25-day all-sky Galactic survey can find