Submillimeter Continuum Properties of Cold Dust in the Inner Disk and Outflows of M82Deep submillimeter (submm) continuum imaging observations of the starburst galaxy M82 are presented at 350, 450, 750 and 850 micron wavelengths, that were undertaken with the Submillimetre…Lerothodi L. Leeuw, E. Ian Robson·Dec 18, 2008SaveLearn
The magnetic field structure in NGC 253 in presence of a galactic windWe present radio continuum polarimetry observations of the nearby edge-on galaxy NGC 253 which possesses a very bright radio halo. Using the vertical synchrotron emission profiles and the lifetimes…V. Heesen, M. Krause, R. Beck et al.·Dec 18, 2008SaveLearn
Lack of PAH emission toward low-mass embedded young stellar objectsPAHs have been detected toward molecular clouds and some young stars with disks, but have not yet been associated with embedded young stars. We present a sensitive mid-IR spectroscopic survey of PAH…V. C. Geers, E. F. van Dishoeck, K. M. Pontoppidan et al.·Dec 18, 2008SaveLearn
Cosmological Perturbations at Second Order and Recombination PerturbedWe derive the full set of second-order equations governing the evolution of cosmological perturbations, including the effects of the first-order electron number density perturbations, δe. We provide…Leonardo Senatore, Svetlin Tassev, Matias Zaldarriaga·Dec 18, 2008SaveLearn
A novel method for the absolute fluorescence yield measurement by AIRFLYOne of the goals of the AIRFLY (AIR FLuorescence Yield) experiment is to measure the absolute fluorescence yield induced by electrons in air to better than 10% precision. We introduce a new technique…AIRFLY Collaboration, M. Ave·Dec 18, 2008SaveLearn
Spiral density wave triggering of star formation in SA and SAB galaxiesAzimuthal color (age) gradients across spiral arms are one of the main predictions of density wave theory; gradients are the result of star formation triggering by the spiral waves. In a sample of 13…Eric E. Martínez-García, Rosa Amelia González-Lópezlira, Gustavo Bruzual-A.·Dec 18, 2008SaveLearn
Planet influence on the shape of the hosting star - ellipsoidal variations of tau BootisThis paper presents estimations on the possibility of detection of ellipsoidal variations by means of measuring brightness of the star distorted by a close massive planet using Wilson-Devinney…W. Dimitrov·Dec 18, 2008SaveLearn
Simulating star formation in molecular cloud cores IV. The role of turbulence and thermodynamicsWe perform SPH simulations of the collapse and fragmentation of low-mass cores having different initial levels of turbulence (alphaturb=0.05,0.10,0.25). We use a new treatment of the energy equation…R. E. Attwood, S. P. Goodwin, D. Stamatellos et al.·Dec 18, 2008SaveLearn
Mass Loss by X-ray Winds from Active Galactic NucleiWe consider a sample of type-I active galactic nuclei (AGN) that were observed by Chandra/HETG and resulted in high signal-to-noise grating spectra, which we study in detail. All objects show…Doron Chelouche·Dec 18, 2008SaveLearn
Dark Energy vs. Dark Matter: Towards a Unifying Scalar Field?The standard model of cosmology suggests the existence of two components, "dark matter" and "dark energy", which determine the fate of the Universe. Their nature is still under…A. Arbey·Dec 18, 2008SaveLearn
Shear Flows Driven by the Lorentz Force: An Energy Source for Coronal Mass Ejections and FlaresShear flows have been prescribed in numerical models of coronal mass ejections and flares for decades as a way of energizing magnetic fields to erupt. While such shear flows have long been observed…Ward B. Manchester·Dec 18, 2008SaveLearn
On the antimatter signatures of the cosmological dark matter subhalosWhile the PAMELA collaboration has recently confirmed the cosmic ray positron excess, it is interesting to review the effects of dark matter (DM) subhalos on the predicted antimatter signals. We…Julien Lavalle·Dec 18, 2008SaveLearn
Optimal filter systems for photometric redshift estimationIn the next years, several cosmological surveys will rely on imaging data to estimate the redshift of galaxies, using traditional filter systems with 4-5 optical broad bands; narrower filters improve…N. Benitez, M. Moles, J. A. L. Aguerri et al.·Dec 18, 2008SaveLearn
Delayed Recombination and Standard RulersMeasurements of Baryonic Acoustic Oscillations in galaxy surveys have been recognized as a powerful tool for constraining dark energy. However, this method relies on the knowledge of the size of the…Francesco De Bernardis, Rachel Bean, Silvia Galli et al.·Dec 18, 2008SaveLearn
Observations of the transiting planet TrES-2 with the AIU Jena telescope in GroßschwabhausenWe have started high precision photometric monitoring observations at the AIU Jena observatory in Grossschwabhausen near Jena in fall 2006. We used a 25 cm Cassegrain telescope equipped with a…St. Raetz, M. Mugrauer, T. O. B. Schmidt et al.·Dec 18, 2008SaveLearn
Shape parameters of Galactic open clusters(abridged) In this paper we derive observed and modelled shape parameters (apparent ellipticity and orientation of the ellipse) of 650 Galactic open clusters identified in the ASCC-2.5 catalogue. We…N. V. Kharchenko, P. Berczik, M. I. Petrov et al.·Dec 18, 2008SaveLearn
Bayesian optimal reconstruction of the primordial power spectrumThe form of the primordial power spectrum has the potential to differentiate strongly between competing models of perturbation generation in the early universe and so is of considerable importance.…M. Bridges, F. Feroz, M. P. Hobson et al.·Dec 18, 2008SaveLearn
Three-dimensional Radiative Transfer Modeling of the Polarization of the Sun's Continuous SpectrumHere we formulate and solve the 3D radiative transfer problem of the polarization of the solar continuous radiation. Our approach takes into account not only the anisotropy of the continuum…J. Trujillo Bueno, N. Shchukina·Dec 18, 2008SaveLearn
The Milky Way Spiral Arm PatternA complete map of the 3D distribution of molecular (CO) gas was constructed using a realistic dynamical model of the gas flow in the barred potential of the Milky Way. The map shows two prominent…Peter Englmaier, Martin Pohl, Nicolai Bissantz·Dec 18, 2008SaveLearn
Spectropolarimetry of SNR G296.5+10.0Radio continuum emission from the supernova remnant G296.5+10.0 was observed using the Australia Telescope Compact Array. Using a 104 MHz bandwidth split into 13 x 8 MHz spectral channels, it was…L. Harvey-Smith, B. M. Gaensler, C. -Y. Ng et al.·Dec 18, 2008SaveLearn
Shattering and coagulation of dust grains in interstellar turbulenceWe investigate shattering and coagulation of dust grains in turbulent interstellar medium (ISM). The typical velocity of dust grain as a function of grain size has been calculated for various ISM…Hiroyuki Hirashita, Huirong Yan·Dec 18, 2008SaveLearn
Spitzer--IRAC Imagery and Photometry of Ultracompact HII Regions With Extended EmissionWe present the results of a morphological study performed to a sample of Ultracompact (UC) HII regions with Extended Emission (EE) using Spitzer--IRAC imagery and 3.6 cm VLA conf. D radio-continuum…E. de la Fuente, A. Porras, J. M. C. Grave et al.·Dec 18, 2008SaveLearn
Evolution of Magnetic Fields in High Mass Star Formation: SMA dust polarization image of the UCHII region G5.89-0.39We report high angular resolution (3") Submillimeter Array (SMA) observations of the molecular cloud associated with the Ultra-Compact HII region G5.89-0.39. Imaged dust continuum emission at 870…Ya-Wen Tang, Paul T. P. Ho, Josep Miquel Girart et al.·Dec 18, 2008SaveLearn
Does the Universe Have a Handedness?In this article I extend an earlier study of spiral galaxies in the Sloan Digital Sky Survey (SDSS) to investigate whether the universe has an overall handedness. A preference for spiral galaxies in…Michael J. Longo·Dec 18, 2008SaveLearn
Connecting Reionization to the Local UniverseWe present results of combined N-body and three-dimensional reionization calculations to determine the relationship between reionization history and local environment in a volume 1 Gpc/h across and a…Marcelo A. Alvarez, Michael T. Busha, Tom Abel et al.·Dec 18, 2008SaveLearn