The Dust-to-Gas Ratio in the Small Magellanic Cloud TailThe Tail region of the Small Magellanic Cloud (SMC) was imaged using the MIPS instrument on the Spitzer Space Telescope as part of the SAGE-SMC Spitzer Legacy. Diffuse infrared emission from dust was…K. D. Gordon, C. Bot, E. Muller et al.·Nov 17, 2008SaveLearn
An Improved Model of SiO Maser Emission in MirasWe describe a combined dynamic atmosphere and maser propagation model of SiO maser emission in Mira variables. This model rectifies many of the defects of an earlier model of this type, particularly…M. D. Gray, M. Wittkowski, M. Scholz et al.·Nov 17, 2008SaveLearn
Dark Matter Annihilation in the light of EGRET, HEAT, WMAP, INTEGRAL and ROSATThe ROSAT Galactic wind observations confirm that our Galaxy launches supernova driven Galactic winds with wind speeds of about 150 km/s in the Galactic plane. Galactic winds of this strength are…Iris Gebauer·Nov 17, 2008SaveLearn
Simultaneous NIR/sub-mm observation of flare emission from SgrA*We report on a successful, simultaneous observation and modeling of the sub-millimeter to near-infrared flare emission of the Sgr A* counterpart associated with the super-massive black hole at the…A. Eckart, R. Schoedel, M. Garcia-Marin et al.·Nov 17, 2008SaveLearn
Effects of Uniform and Differential Rotation on Stellar PulsationsWe have investigated the effects of uniform rotation and a specific model for differential rotation on the pulsation frequencies of 10 \ stellar models. Uniform rotation decreases the…C. C. Lovekin, R. G. Deupree, M. J. Clement·Nov 17, 2008SaveLearn
Sunspots: from small-scale inhomogeneities towards a global theoryThe penumbra of a sunspot is a fascinating phenomenon featuring complex velocity and magnetic fields. It challenges both our understanding of radiative magneto-convection and our means to measure and…Rolf Schlichenmaier·Nov 17, 2008SaveLearn
Quiet Sun mini-CMEs activated by supergranular flowsContext: The atmosphere of the quiet Sun is controlled by photospheric flows sweeping up concentrations of mixed polarity magnetic field. Along supergranule boundaries and junctions, there is a…D. E. Innes, A. Genetelli, R. Attie et al.·Nov 17, 2008SaveLearn
A kinematic study of the irregular dwarf galaxy NGC 2366 using HI and Halpha observationsAbridged. Context. The metal content of dwarf galaxies and the metal enrichment of the intergalactic medium both suggest that mass loss from galaxies is a significant factor for the chemical…J. van Eymeren, M. Marcelin, B. Koribalski et al.·Nov 17, 2008SaveLearn
GRS 1915+105 : High-energy Insights with SPI/INTEGRALWe report on results of two years of INTEGRAL/SPI monitoring of the Galactic microquasar GRS 1915+105. From September 2004 to May 2006, the source has been observed twenty times with long (approx 100…Robert Droulans, Elisabeth Jourdain·Nov 17, 2008SaveLearn
Repeating microlensing events in the OGLE dataMicrolensing events are usually selected among single-peaked non-repeating light curves in order to avoid confusion with variable stars. However, a microlensing event may exhibit a second…J. Skowron, L. Wyrzykowski, S. Mao et al.·Nov 17, 2008SaveLearn
Galaxy evolution in Abell 85: I. Cluster substructure and environmental effects on the blue galaxy populationThis series of papers explores the evolution of late-type galaxies in the rich cluster Abell 85. Here, we revisit the complex dynamical state of A 85 by using independent methods. We analyze the…H. Bravo-Alfaro, C. A. Caretta, C. Lobo et al.·Nov 17, 2008SaveLearn
A model for the Z-track phenomenon, jet formation and the kilohertz QPO based on Rossi-XTE observations of the Z-track sourcesWe present a new model for the Z-track phenomenon, based on analysis of the spectral evolution around the Z-track in several Z-track sources, in which radiation pressure plays a major role.…M. J. Church, M. Balucinska-Church, N. K. Jackson et al.·Nov 17, 2008SaveLearn
Discovery of Fulminic Acid, HCNO, in Dark CloudsWe report on the first detection in space of fulminic acid, HCNO. This isomer of HNCO has been observed in three starless cores, B1, L1544 and L183, and in the low mass star forming region L1527 with…N. Marcelino, J. Cernicharo, B. Tercero et al.·Nov 17, 2008SaveLearn
Broad-Band Spectrum of The Black Hole Candidate IGR J17497-2821 Studied with SuzakuThe broad-band 1-300 keV Suzaku spectrum of IGR J17497-2821, the X-ray transient discovered by INTEGRAL in September 2006, is presented. Suzaku observed IGR J17497-2821 on September 25, eight days…A. Paizis, K. Ebisawa, H. Takahashi et al.·Nov 17, 2008SaveLearn
Interferometer observations of molecular gas in radio galaxiesWe present the first results of a high-resolution study of the distribution and kinematics of molecular gas in two nearby radio galaxies, 4C31.04 and 3C293, representative of two different stages of…S. Garcia-Burillo, F. Combes, A. Usero et al.·Nov 17, 2008SaveLearn
Balmer Emission Line Profiles and the Complex Properties of Broad Line Regions in Active Galactic NucleiIn this work we analyze a sample of AGN spectra, selected from the 6th Data Release of the Sloan Digital Sky Survey, exploiting a generalized technique of line profile analysis, designed to take into…G. La Mura, F. Di Mille, S. Ciroi et al.·Nov 17, 2008SaveLearn
Amplification of azimuthal modes with odd wave numbers during dynamical bar-mode growth in rotating starsNonlinear growth of the bar-mode deformation is studied for a differentially rotating star with supercritical rotational energy. In particular, the growth mechanism of some azimuthal modes with odd…Yasufumi Kojima, Motoyuki Saijo·Nov 17, 2008SaveLearn
Missing baryons in shells around galaxy clustersThe cluster baryon fraction is estimated from the CMB-scattering leptonic component of the intracluster medium (ICM); however, the observed cluster baryon fraction is less than the cosmic one.…Dmitry Prokhorov·Nov 17, 2008SaveLearn
On type Ia supernovae and the formation of single low-mass white dwarfsThere is still considerable debate over the progenitors of type Ia supernovae (SNe Ia). Likewise, it is not agreed how single white dwarfs with masses less than ~0.5 Msun can be formed in the field,…Stephen Justham, Christian Wolf, Philipp Podsiadlowski et al.·Nov 17, 2008SaveLearn
Nonlinear Structure Formation, Backreaction and Weak Gravitational FieldsThere is an ongoing debate in the literature concerning the effects of averaging out inhomogeneities (``backreaction'') in cosmology. In particular, some simple models of structure formation…Aseem Paranjape·Nov 17, 2008SaveLearn
On the Dynamics of Inclined Neptune's TrojansThe dynamics of artificial asteroids on the Trojan-like orbits around Neptune is investigated in this paper. We describe the dependence of the orbital stability on the initial semimajor axis a and…Li-Yong Zhou, Rudolf Dvorak, Yi-Sui Sun·Nov 17, 2008SaveLearn
The age of the Galaxy's thick diskWe discuss the age of the stellar disks in the solar neighbourhood. After reviewing the various methods for age dating we discuss current estimates of the age of both the thin and the thick disk. We…S. Feltzing, T. Bensby·Nov 17, 2008SaveLearn
MMT/AO 5 micron Imaging Constraints on the Existence of Giant Planets Orbiting Fomalhaut at ~13-40 AUA candidate < 3 Jupiter mass, extrasolar planet was recently imaged by Kalas et al. (2008) using HST/ACS at 12.7" (96 AU) separation from the nearby (d = 7.7 pc) young (~200 Myr) A2V star Fomalhaut.…Matthew A. Kenworthy, Eric E. Mamajek, Philip M. Hinz et al.·Nov 17, 2008SaveLearn
A Unified Framework for Photometric RedshiftsWe present a rigorous mathematical solution to photometric redshift estimation and the more general inversion problem. The challenge we address is to meaningfully constrain unknown properties of…Tamas Budavari·Nov 16, 2008SaveLearn
Direct Imaging of Multiple Planets Orbiting the Star HR 8799Direct imaging of exoplanetary systems is a powerful technique that can reveal Jupiter-like planets in wide orbits, can enable detailed characterization of planetary atmospheres, and is a key step…C. Marois, B. Macintosh, T. Barman et al.·Nov 16, 2008SaveLearn