Imprints of microcausality violation on the cosmic microwave backgroundWe consider a modification of the Heisenberg algebra with the non-vanishing commutator of scalar field operators. We then identify the scalar field with the second quantized inflaton fluctuation and…Archil Kobakhidze·Nov 3, 2008SaveLearn
X-Ray Flares of Gamma-Ray Bursts: Quakes of Solid Quark Stars?We propose a star-quake model to understand X-ray flares of both long and short Gamma-ray bursts (GRBs) in a solid quark star regime. Two kinds of central engines for GRBs are available if…Renxin Xu, Enwei Liang·Nov 3, 2008SaveLearn
Pulsar searches and timing with the SKAThe Square Kilometre Array (SKA) is a planned multi purpose radio telescope with a collecting area approaching 1 million square metres. One of the key science objectives of the SKA is to provide…R. Smits, M. Kramer, B. Stappers et al.·Nov 3, 2008SaveLearn
Diffuse cluster-like radio emission in poor environmentsWe present a study of the spectral, polarimetric, morphological and environmental properties of the diffuse radio source 0809+39 using observations taken with the Westerbork Synthesis Radio…Shea Brown, Lawrence Rudnick·Nov 3, 2008SaveLearn
Massive star formation in Wolf-Rayet galaxies: I. Optical and NIR photometric results(Abridged) We have performed a comprehensive multiwavelength analysis of a sample of 20 starburst galaxies that show the presence of a substantial population of massive stars. The main aims are the…Angel R. Lopez-Sanchez, Cesar Esteban·Nov 3, 2008SaveLearn
Multi-Satellite Observations of Cygnus X-1 to Study the Focused Wind and Absorption DipsHigh-mass X-ray binary systems are powered by the stellar wind of their donor stars. The X-ray state of Cygnus X-1 is correlated with the properties of the wind which defines the environment of mass…Manfred Hanke, Joern Wilms, Moritz Boeck et al.·Nov 3, 2008SaveLearn
On the Development and Applications of Automated Searches for Eclipsing Binary StarsEclipsing binary star systems provide the most accurate method of measuring both the masses and radii of stars. Moreover, they enable testing tidal synchronization and circularization theories, as…Jonathan Devor·Nov 3, 2008SaveLearn
The Optical Variability of the Quasar 3C~279: The Signature of a Decelerating Jet?A recent optical monitoring campaign on the prominent quasar 3C279 revealed a period of a remarkably clean exponential decay of BVRI fluxes with time, with a time constant of 12.8 d, over about 14…M. Boettcher, D. Principe·Nov 3, 2008SaveLearn
Pattern speed evolution and bar reformationBars in spiral galaxies can weaken through gas inflow towards the center, and angular momentum transfer. Several bar episodes can follow one another in the life of the galaxy, if sufficient gas is…F. Combes·Nov 2, 2008SaveLearn
The Effects of the pep Nuclear Reaction and Other Improvements in the Nuclear Reaction Rate Library on Simulations of the Classical Nova OutburstWe have continued our studies of the Classical Nova outburst by evolving TNRs on 1.25Msun and 1.35Msun WDs (ONeMg composition) under conditions which produce mass ejection and a rapid increase in the…S. Starrfield, C. Iliadis, W. R. Hix et al.·Nov 2, 2008SaveLearn
Full Numerical Simulations of Catastrophic Small Body CollisionsThe outcome of collisions between small icy bodies, such as Kuiper belt objects, is poorly understood and yet a critical component of the evolution of the trans-Neptunian region. The expected…Zoe M. Leinhardt, Sarah T. Stewart·Nov 2, 2008SaveLearn
New Constraints on the Asteroid 298 Baptistina, the Alleged Family Member of the K/T ImpactorIn their study Bottke et al. (2007) suggest that a member of the Baptistina asteroid family was the probable source of the K/T impactor which ended the reign of the Dinosaurs 65 Myr ago. Knowledge of…Daniel J. Majaess, David Higgins, Larry A. Molnar et al.·Nov 2, 2008SaveLearn
VLT/FORS1 spectrophotometry of the first planetary nebula discovered in the Phoenix dwarf galaxyContext: A planetary nebula (PN) candidate was discovered during FORS imaging of the Local Group dwarf galaxy Phoenix. Aims: Use this PN to complement abundances from red-giant stars. Methods: FORS…Ivo Saviane, Katrina Exter, Yiannis Tsamis et al.·Nov 2, 2008SaveLearn
The peculiar molecular envelope around the post-AGB star IRAS 08544--4431Circumbinary disks have been hypothesized to exist around a number of binary post-AGB stars. Although most of the circumbinary disks have been inferred through the near IR excess, a few of them are…Dinh-V-Trung·Nov 2, 2008SaveLearn
The LSST Data Mining Research AgendaWe describe features of the LSST science database that are amenable to scientific data mining, object classification, outlier identification, anomaly detection, image quality assurance, and survey…K. D. Borne, J. Becla, I. Davidson et al.·Nov 2, 2008SaveLearn
Stellar, Brown Dwarf, and Multiple Star Properties from Hydrodynamical Simulations of Star Cluster FormationWe report the statistical properties of stars, brown dwarfs and multiple systems obtained from the largest hydrodynamical simulation of star cluster formation to date that resolves masses down to the…Matthew Bate·Nov 2, 2008SaveLearn
Transient jets in the symbiotic prototype Z AndromedaeWe present development of the collimated bipolar jets from the symbiotic prototype Z And that appeared and disappeared during its 2006 outburst. In 2006 July Z And reached its historical maximum at U…A. Skopal, T. Pribulla, J. Budaj et al.·Nov 2, 2008SaveLearn
Can Dark Matter Decay in Dark Energy?We analyze the interaction between Dark Energy and Dark Matter from a thermodynamical perspective. By assuming they have different temperatures, we study the possibility of occurring a decay from…S. H. Pereira, J. F. Jesus·Nov 1, 2008SaveLearn
Stellar Velocities in the Carina, Fornax, Sculptor and Sextans dSph Galaxies: Data from the Magellan/MMFS SurveyWe present spectroscopic data for individual stars observed from 2004 March through 2008 August as part of our Michigan/MIKE Fiber System (MMFS) survey of four dwarf spheroidal (dSph) galaxies:…Matthew G. Walker, Mario Mateo, Edward Olszewski·Nov 1, 2008SaveLearn
E/B mode mixingIn future microwave background polarization experiments, particularly those that aim to characterize the B component, careful attention will have to be paid to the mixing of E and B components due to…Emory F. Bunn·Nov 1, 2008SaveLearn
The Number Of Magnetic Null Points In The Quiet Sun CoronaThe coronal magnetic field above a particular photospheric region will vanish at a certain number of points, called null points. These points can be found directly in a potential field extrapolation…D. W. Longcope, C. E. Parnell·Nov 1, 2008SaveLearn
Peculiar nature of hard X-ray eclipse in SS433 from INTEGRAL observationsThe analysis of INTEGRAL observations (2003-2008) of superaccreting galactic microquasar SS433 at precessional phases with the maximum disk opening angle is carried out. The shape and width of the…A. Cherepashchuk, K. Postnov, E. Antokhina et al.·Nov 1, 2008SaveLearn
Optical photometry and spectroscopy of the type Ibn supernova SN 2006jc until the onset of dust formationWe present optical UBVRI photometric and spectroscopic data of the type Ibn supernova SN 2006jc, until the onset of the dust forming phase. The optical spectrum shows a blue continuum and is…G. C. Anupama, D. K. Sahu, U. K. Gurugubelli et al.·Nov 1, 2008SaveLearn
The Sub-parsec Scale Radio Properties of Southern Starburst Galaxies. II. Supernova Remnants, the Supernova Rate, and the Ionised Medium in the NGC 4945 StarburstWide-field VLBI observations of the nearby starburst galaxy NGC 4945, obtained with the Australian LBA, have produced 2.3 GHz images over two epochs with a maximum spatial resolution of 0.3 pc. 15…E. Lenc, S. J. Tingay·Nov 1, 2008SaveLearn
Vector Magnetic Fields and Electric Currents from the Imaging Vector MagnetographFirst, we describe a general procedure to produce high quality vector magnetograms using the Imaging Vector Magnetograph (IVM) at Mees Solar Observatory. At the spatial resolution 2"x2", the…Jing Li, A. A. van Ballegooijen, Don Mickey·Nov 1, 2008SaveLearn