Magnetic fields, winds and X-rays of massive stars: A spectropolarimetric survey of the Orion clusterIn massive stars, magnetic fields are thought to confine the outflowing radiatively-driven wind, resulting in X-ray emission that is harder, more variable and more efficient than that produced by…V. Petit, G. A. Wade, L. Drissen et al.·Sep 26, 2008SaveLearn
Radio Remote Sensing of the Corona and the Solar WindModern radio telescopes are extremely sensitive to plasma on the line of sight from a radio source to the antenna. Plasmas in the corona and solar wind produce measurable changes in the radio wave…Steven R. Spangler, Catherine A. Whiting·Sep 26, 2008SaveLearn
Introducing a Hybrid Method of Radiative Transfer in Smoothed Particle HydrodynamicsWe present a new method of incorporating radiative transfer into Smoothed Particle Hydrodynamics (SPH). There have been many recent attempts at radiative transfer in SPH (Stamatellos et al 2005,…Duncan Forgan, Ken Rice, Dimitris Stamatellos et al.·Sep 26, 2008SaveLearn
Spectral variability of ultraluminous X-ray sourcesWe study spectral variability of 11 ultraluminous X-ray sources (ULX) using archived XMM-Newton and Chandra observations. We use three models to describe the observed spectra; a power-law, a…Jari J. E. Kajava, Juri Poutanen·Sep 26, 2008SaveLearn
CMB likelihood approximation by a Gaussianized Blackwell-Rao estimatorWe introduce a new CMB temperature likelihood approximation called the Gaussianized Blackwell-Rao (GBR) estimator. This estimator is derived by transforming the observed marginal power spectrum…Ø. Rudjord, N. E. Groeneboom, H. K. Eriksen et al.·Sep 26, 2008SaveLearn
Coordinated AMBER and MIDI observations of the Mira variable RR AqlWe have used near- and mid-infrared interferometry to investigate the pulsating atmosphere and the circumstellar environment of the Mira variable RR Aql. Observations were taken with the VLTI/AMBER…Iva Karovicova, Markus Wittkowski, David A. Boboltz et al.·Sep 26, 2008SaveLearn
The effects of twisted magnetic field on coronal loops oscillations and dissipationThe standing MHD modes in a zero-β cylindrical magnetic flux tube modelled as a straight core surrounded by a magnetically twisted annulus, both embedded in a straight ambient external field is…K. Karami, M. Barin·Sep 26, 2008SaveLearn
The Antares emission nebula and mass loss of alpha Sco AThe Antares nebula is a peculiar emission nebula seen in numerous Fe II lines and in radio free-free emission, probably associated with the H II region caused by alpha Sco B in the wind of alpha Sco…D. Reimers, H. -J. Hagen, R. Baade et al.·Sep 26, 2008SaveLearn
The sub-Jupiter mass transiting exoplanet WASP-11bWe report the discovery of a sub-Jupiter mass exoplanet transiting a magnitude V=11.7 host star 1SWASP J030928.54+304024.7. A simultaneous fit to the transit photometry and radial-velocity…R. G. West, A. Collier Cameron, L. Hebb et al.·Sep 26, 2008SaveLearn
Swift Observations of Shock Evolution in RS OphiuchiOur Swift observations of RS Oph form an unprecedented X-ray dataset to undertake investigations of both the central source and the interaction of the outburst ejecta with the circumstellar…M. F. Bode, J. P. Osborne, K. L. Page et al.·Sep 26, 2008SaveLearn
Extragalactic Classical Nova SurveysWe are currently involved in a multifaceted campaign to study extragalactic classical novae in the Local Group and beyond. Here we report on-going results from the exploitation of the POINT-AGAPE M31…M. J. Darnley, D. T. R. Black, M. F. Bode et al.·Sep 26, 2008SaveLearn
A New Spectroscopic and Photometric Analysis of the Transiting Planet Systems TrES-3 and TrES-4We report new spectroscopic and photometric observations of the parent stars of the recently discovered transiting planets TrES-3 and TrES-4. A detailed abundance analysis based on high-resolution…A. Sozzetti, G. Torres, D. Charbonneau et al.·Sep 26, 2008SaveLearn
Testing evolutionary tracks of Pre-Main Sequence stars: the case of HD113449Evolutionary tracks are of key importance for the understanding of star formation. Unfortunately, tracks published by various groups differ so that it is fundamental to have observational tests. In…F. Cusano, E. W. Guenther, M. Esposito et al.·Sep 26, 2008SaveLearn
Liverpool Telescope Optical Photometry Following the 2006 Outburst of RS OphiuchiWe present a preliminary report on the broadband optical photometry of the 2006 outburst of the recurrent nova RS Ophiuchi. These data were obtained using the robotic 2m Liverpool Telescope and cover…M. J. Darnley, R. A. Hounsell, M. F. Bode·Sep 26, 2008SaveLearn
A diatribe on expanding spaceSome comments are made on the usefulness or otherwise of the concept of `expanding space' in cosmology. These notes are an expanded version of material first published in 2001 but not previously…J. A. Peacock·Sep 26, 2008SaveLearn
Deep low-frequency observations with the Giant Metrewave Radio Telescope: a search for relic radio emissionWe present deep multifrequency observations using the Giant Metrewave Radio Telescope at 153, 244, 610 and 1260 MHz of a field centered on J0916+6348, to search for evidence of fossil radio lobes…S. K. Sirothia, D. J. Saikia, C. H. Ishwara-Chandra et al.·Sep 26, 2008SaveLearn
Large-scale magnetic topologies of M dwarfsWe present here the first results of a spectropolarimetric analysis of a small sample (about 20) of active stars ranging from spectral type M0 to M8, which are either fully-convective or possess a…J. Morin, J. -F. Donati, X. Delfosse et al.·Sep 26, 2008SaveLearn
Cloud formation in substellar atmospheresClouds seem like an every-day experience. But -- do we know how clouds form on brown dwarfs and extra-solar planets? How do they look like? Can we see them? What are they composed of? Cloud formation…Christiane Helling·Sep 26, 2008SaveLearn
Cosmological perturbations through the big bangSeveral scenarios have been proposed in which primordial perturbations could originate from quantum vacuum fluctuations in a phase corresponding to a collapse phase (in an Einstein frame) preceding…David Wands·Sep 26, 2008SaveLearn
Multi-object spectroscopy of low-redshift EIS clusters IV. Reliability of matched-filter results at z~0.3-0.4abridged) In this paper we present new redshifts for 747 galaxies in 23 ESO Imaging Survey (EIS) cluster fields. We use the "gap"-technique to search for significant overdensities in redshift…L. F. Grove, L. da Costa, C. Benoist·Sep 26, 2008SaveLearn
The rotation-magnetic field relationToday, the generation of magnetic fields in solar-type stars and its relation to activity and rotation can coherently be explained, although it is certainly not understood in its entirety. Rotation…A. Reiners, A. Scholz, J. Eislöffel et al.·Sep 26, 2008SaveLearn
New Insights into the Quasar Type1/Type2 Dichotomy from Correlations between Quasar Host Orientation and PolarizationWe investigate correlations between the direction of the optical linear polarization and the orientation of the host galaxy/extended emission for type1 and type2 radio-loud and radio-quiet quasars.…B. Borguet, D. Hutsemékers, G. Letawe et al.·Sep 26, 2008SaveLearn
Beryllium Abundances in Stars of One-Solar-MassWe have determined Be abundances in 50 F and G dwarfs in the mass range of 0.9 ≤ M ≤ 1.1 as determined by Lambert & Reddy. The effective temperatures are 5600 to 6400 K and…Ann Merchant Boesgaard, Julie A. Krugler·Sep 26, 2008SaveLearn
Turbulence: A Probe of the Dynamics and Physics of the Magellanic StreamA recent paper by Stanimirovic etal (2008) presents quit interesting results from HI observations of the Magellanic Stream (MS) tip. The high spatial resolution of the data reveals rich and complex…Itzhak Goldman·Sep 26, 2008SaveLearn
KBS 13 -- a Rare Reflection Effect sdB Binary with an M Dwarf SecondaryWe report preliminary VRI differential photometric and spectroscopic results for KBS 13, a recently discovered non-eclipsing sdB+dM system. Radial velocity measurements indicate an orbital period of…B. -Q. For, H. Edelmann, E. M. Green et al.·Sep 26, 2008SaveLearn