Recent star formation in nearby 3CR radio-galaxies from UV HST observationsWe analyzed HST images of 31 nearby (z <~ 0.1) 3CR radio-galaxies. We compared their UV and optical images to detect evidence of recent star formation. Six objects were excluded because they are…Ranieri D. Baldi, Alessandro Capetti·Aug 11, 2008SaveLearn
Flares as fingerprints of inner solar darknessX-ray flares and other solar brightenings have been discarded as potential axion signatures. An axion X-ray signal must appear exclusively near the disk centre, and its spectrum must peak at ~4.2keV,…K. Zioutas, M. Tsagri, Y. Semertzidis et al.·Aug 11, 2008SaveLearn
The magnetic field and the location of the TeV emitter in Cygnus X-1 and LS 5039Cygnus X-1 and LS 5039 are two X-ray binaries observed at TeV energies. Both sources are compact systems, contain jet-like (radio) structures, and harbor very luminous O stars. A TeV signal has been…V. Bosch-Ramon, D. Khangulyan, F. A. Aharonian·Aug 11, 2008SaveLearn
An alternative parameterisation for binary-lens caustic-crossing eventsMicrolensing events are being discovered and alerted by the two survey teams OGLE and MOA at an increasing rate. Around ten percent of these events involve binary lenses. Such events potentially…A. Cassan·Aug 11, 2008SaveLearn
The effect of stellar winds on the formation of a protoclusterWe present SPH simulations of protoclusters including the effects of winds from massive stars. Using a particle-injection method, we investigate the effect of structure close to the wind sources and…J. E. Dale, I. A. Bonnell·Aug 11, 2008SaveLearn
Influence of primordial magnetic fields on 21 cm emissionMagnetic fields in the early universe can significantly alter the thermal evolution and the ionization history during the dark ages. This is reflected in the 21 cm line of atomic hydrogen, which is…Dominik R. G. Schleicher, Robi Banerjee, Ralf S. Klessen·Aug 11, 2008SaveLearn
Discovery of a Wide Substellar Companion to a Nearby Low-Mass StarWe report the discovery of a wide (135+/-25 AU), unusually blue L5 companion 2MASS J17114559+4028578 to the nearby M4.5 dwarf G 203-50 as a result of a targeted search for common proper motion pairs…Jacqueline Radigan, David Lafrenière, Ray Jayawardhana et al.·Aug 11, 2008SaveLearn
Superhorizon Perturbations and the Cosmic Microwave BackgroundSuperhorizon perturbations induce large-scale temperature anisotropies in the cosmic microwave background (CMB) via the Grishchuk-Zel'dovich effect. We analyze the CMB temperature anisotropies…Adrienne L. Erickcek, Sean M. Carroll, Marc Kamionkowski·Aug 11, 2008SaveLearn
Obscured clusters. II. GLIMPSE-C02 - A new metal rich globular cluster in the Milky WayThe estimated total number of Milky Way globulars is 160+-20. The question of whether there are any more undiscovered globular clusters in the Milky Way is particularly relevant with advances in near…R. Kurtev, V. D. Ivanov, J. Borissova et al.·Aug 11, 2008SaveLearn
The kinetic temperature of a molecular cloud at redshift 0.9: Ammonia in the gravitational lens PKS1830-211Using the Green Bank Telescope (GBT), we have detected the (J,K) = (1,1) to (10,10) ammonia inversion lines, up to 1030 K above the ground state, in a face-on spiral galaxy viewed against the radio…C. Henkel, J. A. Braatz, K. M. Menten et al.·Aug 11, 2008SaveLearn
Radial kinematics of brightest cluster galaxiesThis is the first of a series of papers devoted to the investigation of a large sample of brightest cluster galaxies (BCGs), their kinematic and stellar population properties, and the relationships…S. I. Loubser, A. E. Sansom, P. Sanchez-Blazquez et al.·Aug 11, 2008SaveLearn
Two new Intermediate Polars with a soft X-ray componentWe analyze the first X-ray observations with XMM-Newton of RXS J070407.9+262501 and 1RXS 180340.0+401214, in order to characterize their broad-band temporal and spectral properties, also in the…G. Anzolin, D. de Martino, J. -M. Bonnet-Bidaud et al.·Aug 11, 2008SaveLearn
Optical spectroscopy of 3CR sample of radio sources at z<0.3We are carrying out a program of optical spectroscopy of the complete subsample of the 3CR catalog of radio sources at redshift z < 0.3. The sample consists of 113 3CR sources, comprising FR I, FR II…Sara Buttiglione, Alessandro Capetti, Annalisa Celotti·Aug 11, 2008SaveLearn
The complex galaxy cluster Abell 514: New results obtained with the XMM - Newton satelliteWe study the X-ray morphology and dynamics of the galaxy cluster Abell 514. Also, the relation between the X-ray properties and Faraday Rotation measures of this cluster are investigated in order to…J. Weratschnig, M. Gitti, S. Schindler et al.·Aug 11, 2008SaveLearn
A low background facility inside the LVD detector at Gran SassoThe Large Volume Detector (LVD) in the Gran Sasso Laboratory of INFN is an observatory mainly devoted to search for neutrinos from core collapse supernovae. It consists of 1000 tons of liquid…F. Arneodo, W. Fulgione·Aug 11, 2008SaveLearn
Diffuse interstellar bands in RAVE Survey spectraWe have used spectra of hot stars from the RAVE Survey in order to investigate the visibility and properties of five diffuse interstellar bands previously reported in the literature. The RAVE…U. Munari, L. Tomasella, M. Fiorucci et al.·Aug 11, 2008SaveLearn
Injection of Short-Lived Radionuclides into the Early Solar System from a Faint Supernova with Mixing-FallbackSeveral short-lived radionuclides (SLRs) were present in the early solar system, some of which should have formed just prior to or soon after the solar system formation. Stellar nucleosynthesis has…A. Takigawa, J. Miki, S. Tachibana et al.·Aug 11, 2008SaveLearn
Gas disks to gas giants: Simulating the birth of planetary systemsThe ensemble of now more than 250 discovered planetary systems displays a wide range of masses, orbits and, in multiple systems, dynamical interactions. These represent the end point of a complex…Edward W. Thommes, Soko Matsumura, Frederic A. Rasio·Aug 11, 2008SaveLearn
Simulations of the formation of a gaseous disc and young stars near Sgr A* via cloud-cloud collisionsYoung massive stars in the central parsec of our Galaxy are best explained by star formation within at least one, and possibly two, massive self-gravitating gaseous discs. With help of numerical…Sergei Nayakshin, Alexander Hobbs·Aug 11, 2008SaveLearn
Large-scale magnetic topologies of mid-M dwarfsWe present in this paper the first results of a spectropolarimetric analysis of a small sample (~ 20) of active stars ranging from spectral type M0 to M8, which are either fully-convective or possess…J. Morin, J. -F. Donati, P. Petit et al.·Aug 10, 2008SaveLearn
All-particle primary energy spectrum in the 3-200 PeV energy rangeWe present all-particle primary cosmic-ray energy spectrum in the 3-200 PeV energy range obtained by a multi-parametric event-by-event evaluation of the primary energy. The results are obtained on…A. P. Garyaka, R. M. Martirosov, S. V. Ter-Antonyan et al.·Aug 10, 2008SaveLearn
Spectroscopic and Photometric evidence of two stellar populations in the Galactic Globular Cluster NGC6121 (M4)AIMS. We present abundance analysis based on high resolution spectra of 105 isolated red giant branch (RGB) stars in the Galactic Globular Cluster NGC 6121 (M4). Our aim is to study its star…A. F. Marino, S. Villanova, G. Piotto et al.·Aug 10, 2008SaveLearn
Characterization of integrated optics components for the second generation of VLTI instrumentsTwo of the three instruments proposed to ESO for the second generation instrumentation of the VLTI would use integrated optics for beam combination. Several design are studied, including co-axial and…S. Lacour, L. Jocou, T. Moulin et al.·Aug 10, 2008SaveLearn
Common Envelope Mergers: A Possible Channel for Forming Single sdB StarsWe quantify an evolutionary channel for single sdB stars based on mergers of binaries containing a red giant star and a lower mass main sequence or brown dwarf companion in our Galaxy. Population…Michael Politano, Ronald E. Taam, Marc van der Sluys et al.·Aug 9, 2008SaveLearn
Growth factor parametrization and modified gravityThe growth rate of matter perturbation and the expansion rate of the Universe can be used to distinguish modified gravity and dark energy models in explaining the cosmic acceleration. The growth rate…Yungui Gong·Aug 9, 2008SaveLearn