Disformal quintessenceA canonic scalar field minimally coupled to a disformal metric generated by the field itself is considered. Causality and stability conditions are derived for such a field. Cosmological effects are…Tomi S. Koivisto·Nov 12, 2008SaveLearn
High Energy Studies of Pulsar Wind NebulaeThe extended nebulae formed as pulsar winds expand into their surroundings provide information about the composition of the winds, the injection history from the host pulsar, and the material into…Patrick Slane·Nov 12, 2008SaveLearn
Identifying Decaying Supermassive Black Hole Binaries from their Variable Electromagnetic EmissionSupermassive black hole binaries (SMBHBs) with masses in the range 104-107 Msun/(1+z), produced in galaxy mergers, are thought to complete their coalescence due to the emission of gravitational…Zoltán Haiman, Bence Kocsis, Kristen Menou et al.·Nov 12, 2008SaveLearn
The genesis of morphologies in extended radio sources: X-shapes, off-axis distortions and giant radio sourcesWe examine relationships between the morphology in double radio sources and the radio-optical position angle offset--the relative orientation of the radio axis with respect to the major axis of the…Lakshmi Saripalli, Ravi Subrahmanyan·Nov 12, 2008SaveLearn
Stellar mass ejectionsIt has been known for some time now that rapidly-rotating solar-like stars possess the stellar equivalent of solar prominences. These may be three orders of magnitude more massive than their solar…M. Jardine, J. -F. Donati, S. G. Gregory·Nov 12, 2008SaveLearn
Magnetic coronae of active main-sequence starsThe coronal structure of main sequence stars continues to puzzle us. While the solar corona is relatively well understood, it has become clear that even stars of the same mass as the Sun can display…M. Jardine, J. -F. Donati·Nov 12, 2008SaveLearn
Probing Cosmic Dust of the Early Universe through High-Redshift Gamma-Ray BurstsWe explore the extinction properties of the dust in the distant universe through the afterglows of high-redshifted GRBs based on the "Drude" model which, unlike previous studies, does not…S. L. Liang, Aigen Li·Nov 12, 2008SaveLearn
The physical properties of Lyalpha emitting galaxies: not just primeval galaxies?We have analyzed a sample of LBGs from z =3.5 to z=6 selected from the GOODS-S field as B,V and i-dropouts, and with spectroscopic observations showing that they have the Lyalpha line in emission.…L. Pentericci, A. Grazian, A. Fontana et al.·Nov 12, 2008SaveLearn
Non-universal scalar-tensor theories and big bang nucleosynthesisWe investigate the constraints that can be set from big-bang nucleosynthesis on two classes of models: extended quintessence and scalar-tensor theories of gravity in which the equivalence principle…Alain Coc, Keith A. Olive, Jean-Philippe Uzan et al.·Nov 12, 2008SaveLearn
Young Brown Dwarfs in the Core of the W3 Main Star-Forming RegionWe present the results of deep and high-resolution (FWHM ~ 0".35) JHK NIR observations with the Subaru telescope, to search for very low mass young stellar objects (YSOs) in the W3 Main…D. K. Ojha, M. Tamura, Y. Nakajima et al.·Nov 12, 2008SaveLearn
Spherical Collapse in Modified Newtonian Dynamics (MOND)Modeling the structure formation in the universe, we extend the spherical collapse model in the context of MOND starting with the linear Newtonian structure formation followed by the MONDian…M. Malekjani, S. Rahvar, H. Haghi·Nov 12, 2008SaveLearn
X-Ray Reflection Nebulae with Large Equivalent Widths of Neutral Iron Ka Line in the Sgr C RegionThis paper reports on the first results of the Suzaku observation in the Sgr C region. We detected four diffuse clumps with strong line emission at 6.4keV, Ka from neutral or low-ionized Fe. One of…Hiroshi Nakajima, Takeshi Go Tsuru, Masayoshi Nobukawa et al.·Nov 12, 2008SaveLearn
Self-Organizing Maps. An application to the OGLE data and the Gaia Science AlertsSelf-Organizing Map (SOM) is a promising tool for exploring large multi-dimensional data sets. It is quick and convenient to train in an unsupervised fashion and, as an outcome, it produces natural…Lukasz Wyrzykowski, Vasily Belokurov·Nov 12, 2008SaveLearn
Gravitational Lensing in the metric theory proposed by SoboutiRecently, Y. Sobouti (2007) has provided a metric theory f(R) that can account for certain dynamical anomalies observed in spiral galaxies. Mendoza & Rosas-Guevara (2007) have shown that in this…Tula Bernal, Sergio Mendoza·Nov 12, 2008SaveLearn
Development of cryogenic phonon detectors based on CaMoO4 and ZnWO4 scintillating crystals for direct dark matter search experimentsThis work reports on the development of the first phonon detectors based on CaMoO4 and ZnWO4 scintillating crystals for the CRESST-II experiment. In particular, a novel technique for the production…I. Bavykina, G. Angloher, D. Hauff et al.·Nov 12, 2008SaveLearn
Measurement of sound speed versus depth in Antarctic ice with the South Pole Acoustic Test SetupThe feasibility and design of an acoustic neutrino detection array in the South Pole ice depend on the acoustic properties of the ice. The South Pole Acoustic Test Setup (SPATS) was built to evaluate…Freija Descamps·Nov 11, 2008SaveLearn
The Evolution of the Stellar Mass Function of Galaxies from z=4.0 and the First Comprehensive Analysis of its Uncertainties: Evidence for Mass-dependent Evolution[Abridged] We present the evolution of the stellar mass function (SMF) of galaxies from z=4.0 to z=1.3 measured from a sample constructed from the deep NIR MUSYC, the FIRES, and the GOODS-CDFS…Danilo Marchesini, Pieter G. van Dokkum, Natascha M. Forster Schreiber et al.·Nov 11, 2008SaveLearn
Nonlinear Prediction of Solar Cycle 24Sunspot activity is highly variable and challenging to forecast. Yet forecasts are important, since peak activity has profound effects on major geophysical phenomena including space weather…A. Kilcik, C. N. K. Anderson, J. P. Rozelot et al.·Nov 11, 2008SaveLearn
Toward constraints on galaxy formation scenarios: stellar properties from Galactic surveysWe present some of the strategies being developed to classify and parameterize objects obtained with spectra from the Sloan Digital Sky Survey (SDSS) and the RAdial Velocity Experiment (RAVE) and…P. Re Fiorentin, C. A. L. Bailer-Jones, T. C. Beers et al.·Nov 11, 2008SaveLearn
First Results from the IceTop Air Shower ArrayIceTop is a 1 km2 air shower detector presently under construction as a part of the IceCube Observatory at South Pole. It will consist of 80 detector stations, each equipped with two ice Cherenkov…Stefan Klepser·Nov 11, 2008SaveLearn
Critical Review of Basic Afterglow ConceptsThe long lived afterglow emission that follows gamma-ray bursts (GRBs) was predicted prior to its detection in 1997, in the X-rays, optical and radio. It is thought to arise from the shock that is…Jonathan Granot·Nov 11, 2008SaveLearn
Semi-global simulations of the magneto-rotational instability in core collapse supernovaePossible effects of magnetic fields in core collapse supernovae rely on an efficient amplification of the weak pre-collapse fields. It has been suggested that the magneto-rotational instability (MRI)…M. Obergaulinger, P. Cerdà-Duràn, E. Müller et al.·Nov 11, 2008SaveLearn
Signals of Statistical Anisotropy in WMAP Foreground-Cleaned MapsRecently a symmetry-based method to test for statistical isotropy of the cosmic microwave background was developed. We apply the method to template-cleaned 3-year and 5-year WMAP-DA maps. We…Pramoda Kumar Samal, Rajib Saha, Pankaj Jain et al.·Nov 11, 2008SaveLearn
Neutron reactions in accreting neutron stars: a new pathway to efficient crust heatingIn our calculation of neutron star crust heating we include several key new model features. In earlier work electron capture (EC) only allowed neutron emission from the daughter ground-state; here we…Sanjib S. Gupta, Toshihiko Kawano, Peter Möller·Nov 11, 2008SaveLearn
Extracting Information from the Gravitational Redshift of Compact Rotating ObjectsWhen rotation is not taken into account, the measurement of the Gravitational Redshift can provide unique information about the compactness (M/R) of the star. Rotation alters the gravitational…Paul Nunez, Marek Nowakowski·Nov 11, 2008SaveLearn