Muon Flux Limits for Majorana Dark Matter ParticlesWe analyze the effects of capture of dark matter (DM) particles, with successive annihilations, predicted in the minimal walking technicolor model (MWT) by the Sun and the Earth. We show that the…Konstantin Belotsky, Maxim Khlopov, Chris Kouvaris·Oct 11, 2008SaveLearn
The bifurcation periods in low-mass X-ray binaries: the effect of magnetic braking and mass lossThe bifurcation period in low-mass X-ray binaries is the initial orbital pe- riod which separates the formation of converging systems (which evolve with decreasing orbital periods until the donor…Bo Ma, Xiang-Dong Li·Oct 11, 2008SaveLearn
Supermassive black holes, star formation and downsizing of elliptical galaxiesThe overabundance of Mg relative to Fe, observed in the nuclei of bright ellipticals, and its increase with galactic mass, poses a serious problem for all current models of galaxy formation. Here we…A. Pipino, J. Silk, F. Matteucci·Oct 11, 2008SaveLearn
Parity Dependence in Strong Lens Systems as a Probe of Dark Matter SubstructureThe amount of mass in small, dark matter clumps within galaxies (substructure) is an important test of cold dark matter. One approach to measuring the substructure mass fraction is to analyze the…Jacqueline Chen·Oct 11, 2008SaveLearn
The Nature of Unresolved Soft X-ray Emission from the Galactic DiskAlthough about 40% of the soft X-ray background emission in 0.4 to 1 keV range has extragalactic origins and thus is totally blocked by the Galactic absorption in midplane directions, it decreases at…K. Masui, K. Mitsuda, N. Y. Yamasaki et al.·Oct 11, 2008SaveLearn
Formation, evolution and multiplicity of brown dwarfs and giant exoplanetsThis proceeding summarises the talk of the awardee of the Spanish Astronomical Society award to the the best Spanish thesis in Astronomy and Astrophysics in the two-year period 2006-2007. The thesis…Jose A. Caballero·Oct 11, 2008SaveLearn
What can we learn on the structure and the dynamics of the solar core with g modes?The detection of the signature of dipole gravity modes has opened the path to study the solar inner radiative zone. Indeed, g modes should be the best probes to infer the properties of the solar…S. Mathur, J. Ballot, A Eff-Darwich et al.·Oct 11, 2008SaveLearn
Preliminary results on a Virtual Observatory search for companions to Luyten starsThe Aladin sky atlas of the Virtual Observatory has shown to be a powerful and easy-handling tool for the discovery, confirmation, and characterisation of high proper-motion, multiple stellar systems…J. A. Caballero, F. X. Miret, J. Genebriera et al.·Oct 11, 2008SaveLearn
Stars and brown dwarfs, spatial distribution, multiplicity, X-rays, discs, and the complete mass function of the sigma Orionis clusterThe young sigma Orionis cluster in the Orion Belt is an incomparable site for studying the formation and evolution of high-mass, solar-like, and low-mass stars, brown dwarfs, and substellar objects…Jose A. Caballero·Oct 11, 2008SaveLearn
High-resolution X-ray spectroscopy of the evolving shock in the 2006 outburst of RS OphiuchiThe evolution of the 2006 outburst of the recurrent nova RS Ophiuchi was followed with 12 X-ray grating observations with Chandra and XMM-Newton. We present detailed spectral analyses using two…J. -U. Ness, J. J. Drake, S. Starrfield et al.·Oct 11, 2008SaveLearn
Optical Identifications of Five INTEGRAL Hard X-ray Sources in the Galactic Plane RegionThe results of optical identifications of five hard X-ray sources in the Galactic plane region from the INTEGRAL all-sky survey are presented. The X-ray data on one source (IGRJ20216+4359) are…I. F. Bikmaev, R. A. Burenin, M. G. Revnivtsev et al.·Oct 11, 2008SaveLearn
Searching for spiral features in the outer Galactic disk. The field towards WR38 and WR38aThe detailed spiral structure in the outer Galactic disk is still poorly known, and for several Galactic directions we rely on model extrapolations. One of these regions is the fourth Galactic…Giovanni Carraro, Edgardo Costa·Oct 11, 2008SaveLearn
An Improved Method for Using MgII to Estimate Black Hole Masses in Active Galactic NucleiWe present a method for obtaining accurate black hole (BH) mass estimates from the MgII emission line in active galactic nuclei (AGNs). Employing the large database of AGN measurements from the Sloan…Christopher A. Onken, Juna A. Kollmeier·Oct 11, 2008SaveLearn
Core-Collapse Astrophysics with a Five-Megaton Neutrino DetectorThe legacy of solar neutrinos suggests that large neutrino detectors should be sited underground. However, to instead go underwater bypasses the need to move mountains, allowing much larger water…Matthew D. Kistler, Hasan Yuksel, Shin'ichiro Ando et al.·Oct 10, 2008SaveLearn
Structural Properties of Pseudo-Bulges, Classical Bulges and Elliptical Galaxies: an SDSS PerspectiveWe have performed 2D bulge/bar/disc decompositions using g, r and i-band images of a representative sample of nearly 1000 galaxies from the Sloan Digital Sky Survey. We show that the Petrosian…Dimitri A. Gadotti·Oct 10, 2008SaveLearn
VERITAS Distant Laser Calibration and Atmospheric MonitoringAs a calibrated laser pulse propagates through the atmosphere, the intensity of the Rayleigh scattered light arriving at the VERITAS telescopes can be calculated precisely. This allows for absolute…C. M. Hui·Oct 10, 2008SaveLearn
Axisymmetric smoothed particle hydrodynamics with self-gravityThe axisymmetric form of the hydrodynamic equations within the smoothed particle hydrodynamics (SPH) formalism is presented and checked using idealized scenarios taken from astrophysics (free fall…D. Garcia-Senz, A. Relano, R. M. Cabezon et al.·Oct 10, 2008SaveLearn
VERITAS Observations of Extragalactic Non-BlazarsDuring the 2007/2008 season, VERITAS was used for observations at E>200 GeV of several extragalactic non-blazar objects such as galaxy clusters, starburst and interacting galaxies, dwarf galaxies,…C. M. Hui·Oct 10, 2008SaveLearn
Ground-based CCD astrometry with wide field imagers. III. WFI@2.2m proper-motion catalog of the globular cluster omega CentauriOmega Centauri is the most well studied Globular Cluster because of its numerous puzzling features. Intensive spectroscopic follow-up observing campaigns targeting stars at different positions on the…A. Bellini, G. Piotto, L. R. Bedin et al.·Oct 10, 2008SaveLearn
A consistent solution for the velocity field and mass-loss rate of massive starsStellar winds are an important aspect of our understanding of the evolution of massive stars and their input into the interstellar medium. Here we present solutions for the velocity field and…Patrick E. Müller, Jorick S. Vink·Oct 10, 2008SaveLearn
The Yuan-Tseh Lee Array for Microwave Background AnisotropyThe Yuan-Tseh Lee Array for Microwave Background Anisotropy (AMiBA) is the first interferometer dedicated to studying the cosmic microwave background (CMB) radiation at 3mm wavelength. The choice of…Paul T. P. Ho, Pablo Altamirano, Chia-Hao Chang et al.·Oct 10, 2008SaveLearn
Cosmological Constraints from calibrated Yonetoku and Amati relation implies Fundamental plane of Gamma-ray burstsWe consider two empirical relations using data only from the prompt emission of Gamma-Ray Bursts (GRBs), peak energy (Ep) - peak luminosity (Lp) relation (so called Yonetoku relation) and…Ryo Tsutsui, Takashi Nakamura, Daisuke Yonetoku et al.·Oct 10, 2008SaveLearn
Neutrino Detection with the Surface Array of the Pierre Auger ObservatoryThe Pierre Auger Observatory has the capability of detecting neutrino-induced extensive air showers by searching for very inclined showers with a significant electromagnetic component. In order to…H. J. Blümer, D. Gora, M. Roth et al.·Oct 10, 2008SaveLearn
Star Formation at Very Low Metallicity. V. The Greater Importance of Initial Conditions Compared to Metallicity ThresholdsThe formation of the first stars out of metal-free gas appears to result in stars at least an order of magnitude more massive than in the present-day case. We here consider what controls the…A. -K. Jappsen, M. -M. Mac Low, S. C. O. Glover et al.·Oct 10, 2008SaveLearn
Chemical modeling of L183 (= L134N) : an estimate of the ortho/para H2 ratioContext. The high degree of deuteration observed in some prestellar cores depends on the ortho-to-para H2 ratio through the H3+ fractionation. Aims. We want to constrain the ortho/para H2 ratio…Laurent Pagani, Charlotte Vastel, Edouard Hugo et al.·Oct 10, 2008SaveLearn