The TEXES Survey For H2 Emission From Protoplanetary DisksWe report the results of a search for pure rotational molecular hydrogen emission from the circumstellar environments of young stellar objects with disks using the Texas Echelon Cross Echelle…M. A. Bitner, M. J. Richter, J. H. Lacy et al.·Aug 7, 2008SaveLearn
Explosive Events and the Evolution of the Photospheric Magnetic FieldTransition region explosive events have long been suggested as direct signatures of magnetic reconnection in the solar atmosphere. In seeking further observational evidence to support this…K. Muglach·Aug 7, 2008SaveLearn
Rapid Molecular Cloud and Star Formation: Mechanisms and MoviesWe demonstrate that the observationally inferred rapid onset of star formation after parental molecular clouds have assembled can be achieved by flow-driven cloud formation of atomic gas, using our…Fabian Heitsch, Lee Hartmann·Aug 7, 2008SaveLearn
Three-dimensional models of metal-poor starsI present here the main results of recent realistic, 3D, hydrodynamical simulations of convection at the surface of metal-poor red giant stars. I discuss the application of these convection…R. Collet·Aug 7, 2008SaveLearn
Mass-loss and diffusion in subdwarf B stars and hot white dwarfs: do weak winds exist?The effect of diffusion on the chemical composition of subdwarf B (sdB) stars and of hot white dwarfs strongly depends on the presence of weak winds. In the paper, for stars with half a solar mass,…Klaus Unglaub·Aug 7, 2008SaveLearn
On the equilibrium rotation of Earth-like extra-solar planetsThe equilibrium rotation of tidally evolved "Earth-like" extra-solar planets is often assumed to be synchronous with their orbital mean motion. The same assumption persisted for Mercury and…Alexandre C. M. Correia, Benjamin Levrard, Jacques Laskar·Aug 7, 2008SaveLearn
The unusual pre-main-sequence star V718 Per (HMW 15)The remarkable pre-main-sequence object V718 Per (HMW 15, H187) in the young cluster IC 348 periodically undergoes long-lasting eclipses caused by variable amounts of circumstellar dust in the…V. Grinin, H. C. Stempels, G. F. Gahm et al.·Aug 7, 2008SaveLearn
Effects of Beta-Decays of Excited-State Nuclei on the Astrophysical r-ProcessA rudimentary calculation is employed to evaluate the possible effects of beta- decays of excited-state nuclei on the astrophysical r-process. Single-particle levels calculated with the FRDM are…M. A. Famiano, R. N. Boyd, T. Kajino et al.·Aug 7, 2008SaveLearn
Low Mass X-ray Binaries and Black Holes in Globular ClustersStudies of nearby galaxies reveal that roughly half of their low mass X-ray binary (LMXB) populations are associated with globular clusters (GCs). We have established that the LMXB hosting frequency…Arunav Kundu, Thomas J. Maccarone, Stephen E. Zepf et al.·Aug 7, 2008SaveLearn
Modelling ultra-fine structure in dark matter halosVarious laboratory-based experiments are underway attempting to detect dark matter directly. The event rates and detailed signals expected in these experiments depend on the dark matter phase space…Daniele S. M. Fantin, Michael R. Merrifield, Anne M. Green·Aug 7, 2008SaveLearn
Is there Quark Matter in (Low-Mass) Pulsars?The effect of the QCD phase transition is studied for the mass-radius relation of compact stars and for hot and dense matter at a given proton fraction used as input in core-collapse supernova…Irina Sagert, Giuseppe Pagliara, Matthias Hempel et al.·Aug 7, 2008SaveLearn
Ultra high energy cosmic rays and neutrinos after AugerWe discuss the main results that were recently published by the Auger Collaboration and their impact on our knowledge of the ultra high energy cosmic rays and neutrinos.Todor Stanev·Aug 7, 2008SaveLearn
NGC 602 Environment, Kinematics and OriginsThe young star cluster NGC 602 and its associated HII region, N90, formed in a relatively isolated and diffuse environment in the Wing of the Small Magellanic Cloud. Its isolation from other regions…L. Nigra, J. S. Gallagher, L. J. Smith et al.·Aug 7, 2008SaveLearn
Turbulent protostellar discsAspects of turbulence in protostellar accretion discs are being reviewed. The emergence of dead zones due to poor ionization and alternatives to the magneto-rotational instability are discussed. The…Axel Brandenburg·Aug 7, 2008SaveLearn
The dual role of shear in large-scale dynamosThe role of shear in alleviating catastrophic quenching by shedding small-scale magnetic helicity through fluxes along contours of constant shear is discussed. The level of quenching of the dynamo…Axel Brandenburg·Aug 7, 2008SaveLearn
First Resolved Images of the Eclipsing and Interacting Binary Beta LyraeWe present the first resolved images of the eclipsing binary Beta Lyrae, obtained with the CHARA Array interferometer and the MIRC combiner in the H band. The images clearly show the mass donor and…M. Zhao, D. Gies, J. D. Monnier et al.·Aug 7, 2008SaveLearn
A Confirmation of the Strong Clustering of Distant Red Galaxies at 2 < z <3Recent studies have shown that distant red galaxies (DRGs), which dominate the high-mass end of the galaxy population at z~2.5, are more strongly clustered than the population of blue star-forming…Ryan F. Quadri, Rik J. Williams, Kyoung-Soo Lee et al.·Aug 7, 2008SaveLearn
The simulated 21 cm signal during the epoch of reionization : full modeling of the Ly-alpha pumpingThe 21 cm emission of neutral hydrogen is the most promising probe of the epoch of reionization(EoR). In the next few years, the SKA pathfinders will provide statistical measurements of this signal.…S. Baek, P. Di Matteo, B. Semelin et al.·Aug 6, 2008SaveLearn
Cluster Magnetic Fields from Galactic OutflowsWe performed cosmological, magneto-hydrodynamical simulations to follow the evolution of magnetic fields in galaxy clusters, exploring the possibility that the origin of the magnetic seed fields are…J. Donnert, K. Dolag, H. Lesch et al.·Aug 6, 2008SaveLearn
Observations of the Gas Reservoir around a Star Forming Galaxy in the Early UniverseWe present a high signal-to-noise spectrum of a bright galaxy at z = 4.9 in 14 h of integration on VLT FORS2. This galaxy is extremely bright, i850 = 23.10 +/- 0.01, and is strongly-lensed by the…Brenda L. Frye, David. V. Bowen, Mairead Hurley et al.·Aug 6, 2008SaveLearn
Atmospheric Consequences of Cosmic Ray Variability in the Extragalactic Shock Model II: Revised ionization levels and their consequencesIt has been suggested that galactic shock asymmetry induced by our galaxy's infall toward the Virgo Cluster may be a source of periodicity in cosmic ray exposure as the solar system oscillates…A. L. Melott, D. Atri, B. C. Thomas et al.·Aug 6, 2008SaveLearn
Placing direct limits on the mass of earth-bound dark matterWe point out that by comparing the total mass (in gravitational units) of the earth-moon system, as determined by lunar laser ranging, with the sum of the lunar mass as independently determined by…Stephen L. Adler·Aug 6, 2008SaveLearn
VERITAS Discovery of >200GeV Gamma-ray Emission from the Intermediate-frequency-peaked BL Lac Object W ComaeWe report the detection of very high-energy gamma-ray emission from the intermediate-frequency-peaked BL Lacertae object W Comae (z=0.102) by VERITAS. The source was observed between January and…VERITAS Collaboration, V. A. Acciari, E. Aliu et al.·Aug 6, 2008SaveLearn
Signatures of clumpy dark matter in the global 21 cm background signalWe examine the extent to which the self-annihilation of supersymmetric neutralino dark matter, as well as light dark matter, influences the rate of heating, ionisation and Lyman-alpha pumping of…D. T. Cumberbatch, M. Lattanzi, J. Silk·Aug 6, 2008SaveLearn
Wavelet analysis of non-Gaussian anisotropies from primordial voids in simulated maps of the Cosmic Microwave BackgroundPhase transitions taking place during the inflationary epoch give rise to bubbles of true vacuum embedded in the false vacuum. These bubbles can imprint a distinctive signal on the Cosmic Microwave…Fabio Noviello·Aug 6, 2008SaveLearn