Recent results from the CDMS-II experimentThe Cryogenic Dark Matter Search experiment (CDMS) employs low-temperature Ge and Si detectors to detect WIMPs via their elastic scattering interaction with the target nuclei. The current analysis of…T. Bruch·Sep 24, 2008SaveLearn
Systematic Distortion in Cosmic Microwave Background MapsTo minimize instrumentally induced systematic errors, cosmic microwave background (CMB) anisotropy experiments measure temperature differences across the sky using paires of horn antennas,…Hao Liu, Ti-Pei Li·Sep 24, 2008SaveLearn
New Variable Stars on Digitized Moscow Collection Plates. Field 66 Ophiuchi (Northern Half)We initiated digitization of the Moscow collection of astronomical plates using flatbed scanners. Techniques of photographic photometry of the digital images were applied, enabling an effective…D. M. Kolesnikova, L. A. Sat, K. V. Sokolovsky et al.·Sep 24, 2008SaveLearn
Probability for Primordial Black Holes in Multidimensional Universe with Nonlinear Scalar Curvature TermsWe investigate multi-dimensional universe with nonlinear scalar curvature terms to evaluate the probability of creation of primordial black holes. For this we obtain Euclidean instanton solution in…B C Paul, A Saha, S Ghose·Sep 24, 2008SaveLearn
Impact of modulation on CMB B-mode polarization experimentsWe investigate the impact of both slow and fast polarization modulation strategies on the science return of upcoming ground-based experiments aimed at measuring the B-mode polarization of the CMB.…Michael L. Brown, Anthony Challinor, Chris E. North et al.·Sep 24, 2008SaveLearn
Perturbation theory of N point-mass gravitational lens systems without symmetry: small mass-ratio approximationThis paper makes the first systematic attempt to determine using perturbation theory the positions of images by gravitational lensing due to arbitrary number of coplanar masses without any symmetry…Hideki Asada·Sep 24, 2008SaveLearn
Planetary Lensing Signals of High-Magnification Events under Severe Finite-Source EffectWe investigate the effect of a finite source on the planetary-lensing signals of high-magnification events. From this, we find that the dependency of the finite-source effect on the caustic shape is…Cheongho Han, Doeon Kim·Sep 24, 2008SaveLearn
Magnetic topologies of the Herbig Ae/Be starsOur recent discoveries of magnetic fields in a small number of Herbig Ae/Be (HAeBe) stars, the evolutionary progenitors of main sequence A/B stars, raise new questions about the origin of magnetic…E. Alecian, G. A. Wade, C. Catala et al.·Sep 24, 2008SaveLearn
Kinematical Structure of the Magellanic SystemWe review our understanding of the kinematics of the LMC and the SMC, and their orbit around the Milky Way. The line-of-sight velocity fields of both the LMC and SMC have been mapped with high…Roeland P. van der Marel, Nitya Kallivayalil, Gurtina Besla·Sep 24, 2008SaveLearn
High Resolution K-band Spectroscopy of MWC 480 and V1331 CygWe present high resolution (R=25,000-35,000) K-band spectroscopy of two young stars, MWC 480 and V1331 Cyg. Earlier spectrally dispersed (R=230) interferometric observations of MWC 480 indicated the…Joan R. Najita, Greg W. Doppmann, John S. Carr et al.·Sep 24, 2008SaveLearn
The Binarity of the Magellanic Clouds and the Formation of the Magellanic StreamThe HST proper motion (PM) measurements of the Clouds have severe implications for their interaction history with the Milky Way (MW) and with each other. The Clouds are likely on their first passage…Gurtina Besla, Nitya Kallivayalil, Lars Hernquist et al.·Sep 24, 2008SaveLearn
New Analysis of the Proper Motions of the Magellanic Clouds using HST/WFPC2In HST Cycles 11 and 13 we obtained two epochs of ACS/HRC data for fields in the Magellanic Clouds centered on background quasars. We used these data to determine the proper motions of the LMC and…Nitya Kallivayalil, Roeland P. van der Marel, Jay Anderson et al.·Sep 24, 2008SaveLearn
The nature of dusty starburst galaxies in a rich cluster at z=0.4: the progenitors of lenticulars?We present the results of a Spitzer Infrared Spectrograph (IRS) survey of 24um-selected luminous infrared galaxies (LIRGs, LIR > 1011 Lsun) in the rich cluster Cl0024+16 at z=0.4. Optically, these…J. E. Geach, Ian Smail, Sean M. Moran et al.·Sep 24, 2008SaveLearn
Front- vs. back-illuminated CCD cameras for photometric surveys: a noise budget analysisExoplanetary transit and stellar oscillation surveys require a very high precision photometry. The instrumental noise has therefore to be minimized. First, we perform a semi-analytical model of…Nicolas Crouzet, Tristan Guillot, Francois Fressin et al.·Sep 24, 2008SaveLearn
The Unusual Object IC 2144/MWC 778IC 2144 is a small reflection nebula located in the zone of avoidance near the Galactic anticenter. It has been investigated here largely on the basis of Keck/HIRES optical spectroscopy (R ~ 48,000)…G. H. Herbig, William D. Vacca·Sep 24, 2008SaveLearn
The cosmic origin of carbon and manganese[ABRIDGED] We have determined carbon abundances for 51 dwarf stars and manganese abundances for 95 dwarf stars in two distinct and well defined stellar populations - the Galactic thin and thick…Thomas Bensby, Sofia Feltzing·Sep 24, 2008SaveLearn
Searching for modifications to the exponential radioactive decay law with the Cassini spacecraftData from the power output of the radioisotope thermoelectric generators aboard the Cassini spacecraft are used to test the conjecture that small deviations observed in terrestrial measurements of…Peter S. Cooper·Sep 24, 2008SaveLearn
Evidence of Shock-Driven Turbulence in the Solar ChromosphereWe study the acoustic properties of the solar chromosphere in the high-frequency regime using a time sequence of velocity measurements in the chromospheric Ca II 854.2 nm line taken with the…K. P. Reardon, F. Lepreti, V. Carbone et al.·Sep 24, 2008SaveLearn
Supernova Nucleosynthesis in the Early UniverseThe first metal enrichment in the universe was made by supernova (SN) explosions of population (Pop) III stars. The trace remains in abundance patterns of extremely metal-poor (EMP) stars. We…Nozomu Tominaga, Hideyuki Umeda, Keiichi Maeda et al.·Sep 24, 2008SaveLearn
Optical and infrared flares from a transient Galactic soft gamma-ray repeaterSoft gamma-ray repeaters (SGRs) are a rare type of gamma-ray transient sources that are ocasionally detected as bursts in the high-energy sky. They are thought to be produced by magnetars, young…A. J. Castro-Tirado, A. de Ugarte Postigo, J. Gorosabel et al.·Sep 24, 2008SaveLearn
Transverse oscillations of systems of coronal loopsWe study the collective kinklike normal modes of a system of several cylindrical loops using the T-matrix theory. Loops that have similar kink frequencies oscillate collectively with a frequency…M. Luna, J. Terradas, R. Oliver et al.·Sep 24, 2008SaveLearn
Signals of the QCD phase transition in core-collapse supernovaeWe explore the implications of the QCD phase transition during the postbounce evolution of core-collapse supernovae. Using the MIT bag model for the description of quark matter and assuming small bag…I. Sagert, M. Hempel, G. Pagliara et al.·Sep 24, 2008SaveLearn
The magnetic fields of accreting T Tauri starsModels of magnetospheric accretion on to classical T Tauri stars often assume that the stellar magnetic field is a simple dipole. Recent Zeeman-Doppler imaging studies of V2129 Oph and BP Tau have…S. G. Gregory, S. P. Matt, J. -F. Donati et al.·Sep 24, 2008SaveLearn
Modeling X-ray emission from stellar coronaeBy extrapolating from observationally derived surface magnetograms of low-mass stars we construct models of their coronal magnetic fields and compare the 3D field geometry with axial multipoles. AB…S. G. Gregory, M. Jardine, C. Argiroffi et al.·Sep 24, 2008SaveLearn
Spectral analyses of three carbon-enhanced metal-poor starsWe are conducting a high-resolution follow-up of candidate EMP stars extracted from the Sloan Digital Sky Survey (SDSS; York et al. 2000) using UVES at the VLT. Three of the programme stars, SDSS…N. T. Behara, Piercarlo Bonifacio, Hans-Guenter Ludwig et al.·Sep 24, 2008SaveLearn