The properties of cuspy triaxial systems formed due to the radial-orbit instabilityContext. We have investigated the structure and kinematics of triaxial final models formed due to radial-orbit instability from a set of equilibrium anisotropic spherical systems of the…Piffl T., Sotnikova N. Ya·Nov 16, 2008SaveLearn
A spectroscopic study of the blue stragglers in M67Based on spectrophotometric observations from the Guillermo Haro Observatory (Cananea, Mexico), a study of the spectral properties of the complete sample of 24 blue straggler stars (BSs) in the old…G. Q. Liu, L. Deng, M. Chavez et al.·Nov 16, 2008SaveLearn
The rotation rate of the solar radiative zoneThe rotation rate of the solar radiative zone is an important diagnostic for angular-momentum transport in the tachocline and below. In this paper we study the contribution of viscous and magnetic…P. Garaud, C. Guervilly·Nov 16, 2008SaveLearn
Solar neutrinos and the solar composition problemStandard solar models (SSM) are facing nowadays a new puzzle: the solar composition problem. New determinations of solar metal abundances lead SSM calculations to conflict with helioseismological…Carlos Pena-Garay, Aldo Serenelli·Nov 16, 2008SaveLearn
Tuned Finite-Difference Diffusion OperatorsFinite-difference simulations of fluid dynamics and magnetohydrodynamics generally require an explicit diffusion operator, either to maintain stability by attenuating grid-scale structure, or to…Jason Maron, Mordecai-Mark Mac Low·Nov 15, 2008SaveLearn
Diversity among other worlds: characterization of exoplanets by direct detectionThe physical characterization of exoplanets will require to take spectra at several orbital positions. For that purpose, a direct imaging capability is necessary. Direct imaging requires an efficient…J. Schneider, A. Boccaletti, A. Aylward et al.·Nov 15, 2008SaveLearn
Warm gas accretion onto the GalaxyWe present evidence that the accretion of warm gas onto the Galaxy today is at least as important as cold gas accretion. For more than a decade, the source of the bright H-alpha emission (up to 750…J. Bland-Hawthorn·Nov 15, 2008SaveLearn
gamma-ray emission from LS I +61 303: The impact of basic system uncertaintiesLS I +61 303 has been recently detected as a periodic gamma-ray source by the Major Atmospheric Imaging Cerenkov (MAGIC) telescope. A distinctive orbital correlation of the γ-ray emission was…Agnieszka Sierpowska-Bartosik, Diego F. Torres·Nov 15, 2008SaveLearn
IceCube Collaboration Contributions to ARENA 2008Contributions of the IceCube Collaboration to the 3rd International Workshop on Acoustic and Radio EeV Neutrino detection Activities (ARENA 2008). The conference was held at Roma University…IceCube Collaboration·Nov 15, 2008SaveLearn
The Cepheid Period-Luminosity Relation at Mid-Infrared Wavelengths: II. Second-Epoch LMC DataWe present revised and improved mid-infrared Period-Luminosity (PL) relations for Large Magellanic Cloud (LMC) Cepheids based on double-epoch data of 70 Cepheids observed by Spitzer at 3.6, 4.5, 5.8…Barry F. Madore, Wendy L. Freedman, Jane Rigby et al.·Nov 15, 2008SaveLearn
AURA - A radio frequency extension to IceCubeThe excellent radio frequency transparency of cold polar ice, combined with the coherent Cherenkov emission produced by neutrino-induced showers when viewed at wavelengths longer than a few…H. Landsman, L. Ruckman, G. S. Varner·Nov 15, 2008SaveLearn
Brown Dwarfs as Galactic ChronometersBrown dwarfs are natural clocks, cooling and dimming over time due to insufficient core fusion. They are also numerous and present in nearly all Galactic environments, making them potentially useful…Adam J. Burgasser·Nov 15, 2008SaveLearn
Lithium abundances of halo dwarfs based on excitation temperature. I. LTEThe discovery of the Spite plateau in the abundances of 7Li for metal-poor stars led to the determination of an observationally deduced primordial lithium abundance. However, after the success of the…A. Hosford, S. G. Ryan, A. E. Garcia Perez et al.·Nov 15, 2008SaveLearn
Dots, clumps and filaments: the intermittent images of synchrotron emission in random magnetic fields of young supernova remnantsNon-thermal X-ray emission in some supernova remnants originates from synchrotron radiation of ultra-relativistic particles in turbulent magnetic fields. We address the effect of a random magnetic…Andrei M. Bykov, Yury A. Uvarov, Donald C. Ellison·Nov 15, 2008SaveLearn
Synergy of multifrequency studies from observations of NGC6334IWe combine multifrequency observations from the millimeter to near infrared wavelengths that demonstrate the spatial distributions of H2, CO, and NH3 emission, which are all manifestations of various…Andreas Seifahrt, Sven Thorwirth, Henrik Beuther et al.·Nov 15, 2008SaveLearn
A search for wide brown dwarf companions to stars within 10pcWe present the first results of a large imaging survey to identify wide brown dwarf companions to stars within 10 pc. We have performed a deep (H-band limit ~ 19.0 mag), wide field (up to 16x16…Marin Treselj, Andreas Seifahrt, Klaus-Werner Hodapp et al.·Nov 15, 2008SaveLearn
Activity and rotation of low mass stars in young open clustersWe present first results from a multi-object spectroscopy campaign in IC2602, the Hyades, the Pleiades, and the Coma cluster using VLT/FLAMES. We analysed the data for radial velocity, rotational…Andreas Seifahrt, Ansgar Reiners, Aleks Scholz et al.·Nov 15, 2008SaveLearn
Observation and modelling of dusty, low gravity L, and M dwarfsObservational facilities allow now the detection of optical and IR spectra of young M- and L-dwarfs. This enables empirical comparisons with old M- and L- dwarfs, and detailed studies in comparison…Andreas Seifahrt, Christiane Helling, Adam J. Burgasser et al.·Nov 15, 2008SaveLearn
Global Slim Accretion Disk Solutions RevisitedWe show that there exists a maximal possible accretion rate, beyond which global slim disk solutions cannot be constructed because in the vertical direction the gravitational force would be unable to…Cheng-Liang Jiao, Li Xue, Wei-Min Gu et al.·Nov 15, 2008SaveLearn
Mauna Kea Sky Transparency from CFHT SkyProbe DataNighttime sky transparency statistics on Mauna Kea are reported based on data from the Canada-France-Hawaii Telescope SkyProbe monitor. We focus on the period beginning with the start of MegaCam…Eric Steinbring, Jean-Charles Cuillandre, Eugene Magnier·Nov 15, 2008SaveLearn
Cataclysmic Variable Primary Effective Temperatures: Constraints on Binary Angular Momentum LossWe review the most decisive currently available measurements of the surface effective temperatures, Teff, of white dwarf (WD) primaries in cataclysmic variables (CVs) during accretion quiescence, and…Dean M. Townsley, Boris T. Gaensicke·Nov 15, 2008SaveLearn
A Merger Tree with Microsolar Mass Resolution: Application to γ-ray Emission from Subhalo PopulationThe hierarchical growth of dark matter haloes, in which galaxies are hosted, has been studied and modeled using various approaches. In this paper we use a modified version the Sheth & Lemson…Carlo Giocoli, Lidia Pieri, Giuseppe Tormen et al.·Nov 14, 2008SaveLearn
Properties of warm absorbers in active galaxies: a systematic stability curve analysisSignatures of warm absorbers are seen in soft X-ray spectra of about half of all Seyfert1 galaxies observed and in some quasars and blazars. We use the thermal equilibrium curve to study the…Susmita Chakravorty, Ajit K. Kembhavi, Martin Elvis et al.·Nov 14, 2008SaveLearn
Towards micro-arcsecond spatial resolution with Air Cherenkov Telescope arrays as optical intensity interferometersIn this poster contribution we highlight the equivalence between an Imaging Air Cherenkov Telescope (IACT) array and an Intensity Interferometer for a range of technical requirements. We touch on the…W. J. de Wit, S. LeBohec, J. A. Hinton et al.·Nov 14, 2008SaveLearn
What can we learn about protoplanetary disks from analysis of mid-infrared carbonaceous dust emission?In this Paper we analyze the mid-infrared (mid-IR) emission of very small dust particles in a sample of 12 protoplanetary disks to see how they are connected to interstellar dust particles and to…O. Berne, C. Joblin, A. Fuente et al.·Nov 14, 2008SaveLearn