Punctuated inflation and the low CMB multipolesWe investigate inflationary scenarios driven by a class of potentials which are similar in form to those that arise in certain minimal supersymmetric extensions of the standard model. We find that…Rajeev Kumar Jain, Pravabati Chingangbam, Jinn-Ouk Gong et al.·Sep 23, 2008SaveLearn
The effects of primordial non-Gaussianity on the cosmological reionizationWe investigate the effects of non-Gaussianity in the primordial density field on the reionization history. We rely on a semi-analytic method to describe the processes acting on the intergalactic…D. Crociani, L. Moscardini, M. Viel et al.·Sep 23, 2008SaveLearn
Spectropolarimetric Observations of Herbig Ae/Be Stars. II. Comparison of Spectropolarimetric Surveys: HAeBe, Be and Other Emission-Line StarsThe polarization of light across individual spectral lines contains information about the circumstellar environment on very small spatial scales. We have obtained a large number of high precision,…D. M. Harrington, J. R. Kuhn·Sep 23, 2008SaveLearn
Very fast optical flaring from a possible new Galactic magnetarHighly luminous rapid flares are characteristic of processes around compact objects like white dwarfs, neutron stars or black holes. In the high energy regime of X- and gamma-rays, outbursts with…A. Stefanescu, G. Kanbach, A. Słowikowska et al.·Sep 23, 2008SaveLearn
ESA White paper: Atmospheric modeling: Setting Biomarkers in contextMotivation: ESAs goal to detect biomarkers in Earth-like exoplanets in the Habitable Zone requires theoretical groundwork that needs to be done to model the influence of different parameters on the…L. Kaltenegger, F. Selsis·Sep 23, 2008SaveLearn
The Spin Distribution of Millisecond X-ray PulsarsThe spin frequency distribution of accreting millisecond X-ray pulsars cuts off sharply above 730 Hz, well below the breakup spin rate for most neutron star equations of state. I review several…Deepto Chakrabarty·Sep 23, 2008SaveLearn
Motion of the hot spot and spin torque in accreting millisecond pulsarsThe primary concern of this contribution is that accreting millisecond pulsars (AMXPs) show a much larger amount of information than is commonly believed. The three questions to be addressed are: 1.…Alessandro Patruno·Sep 23, 2008SaveLearn
On the variability of HD 170699 - a possible COROT targetWe present the analysis of the variability of HD 170699, a COROT star showing the characteristics of a non evolutionary Delta Scuti star with high rotational velocity. There is a clear period of…M. Alvarez, J. P. Sareyan, L. Parrao et al.·Sep 23, 2008SaveLearn
Prospects for CDM sub-halo detection using high angular resolution observationsIn the CDM scenario, dark matter halos are assembled hierarchically from smaller subunits. A long-standing problem with this picture is that the number of sub-halos predicted by CDM simulations is…T. Riehm, E. Zackrisson, O. Moeller et al.·Sep 23, 2008SaveLearn
Off-nuclear AGN as a signature of recoiling massive black holesDuring the final phases of inspiral, a massive black hole (MBH) binary experiences a recoil due to the asymmetric emission of gravitational waves. We use recent results from numerical relativity…M. Volonteri, P. Madau·Sep 23, 2008SaveLearn
The Orion Molecular Cloud 2/3 and NGC 1977 RegionsThe Orion Molecular Cloud 2/3 region (hereafter, OMC-2/3) and the reflection nebula NGC 1977 encompass a section of the Orion A molecular cloud undergoing vigorous star forming activity. One of the…Dawn E. Peterson, Tom Megeath·Sep 23, 2008SaveLearn
Dissipation and Heating in Supersonic Hydrodynamic and MHD TurbulenceWe study energy dissipation and heating by supersonic MHD turbulence in molecular clouds using Athena, a new higher-order Godunov code. We analyze the dependence of the saturation amplitude, energy…M. Nicole Lemaster, James M. Stone·Sep 23, 2008SaveLearn
Where lies the peak of the brown dwarf binary separation distribution ?Searches for companions of brown dwarfs by direct imaging probe mainly orbital separations > 3-10 AU. On the other hand, previous radial velocity surveys of brown dwarfs are mainly sensitive to…V. Joergens·Sep 23, 2008SaveLearn
New X-ray observations of the old nova CP Puppis and of the more recent nova V351 PupWe present X-ray observations of the field containing Nova Puppis 1942 (CP Pup) and Nova Puppis 1991 (V351 Pup), done with ASCA in 1998, and with XMM-Newton in 2005. The X-ray and UV luminosity of CP…M. Orio, K. Mukai, A. Bianchini et al.·Sep 23, 2008SaveLearn
Photometric variability of the T Tauri star TW Hya on time scales of hours to yearsMOST (Microvariability & Oscillations of STars) and ASAS (All Sky Automated Survey) observations have been used to characterize photometric variability of TW Hya on time scales from a fraction of a…Slavek M. Rucinski, Jaymie M. Matthews, Rainer Kuschnig et al.·Sep 23, 2008SaveLearn
On the self-consistent physical parameters of LMC intermediate-age clustersThe LMC clusters are unique templates of simple stellar population (SSP), being crucial to calibrate models describing the integral light as well as to test the stellar evolution theory. With this in…L. O. Kerber, B. X. Santiago·Sep 23, 2008SaveLearn
Radio Properties of Low Redshift Broad Line Active Galactic NucleiThe question as to whether the distribution of radio-loudness in active galactic nuclei (AGN) is actually bimodal has been discussed extensively in the literature. Futhermore, there have been claims…Stephen E. Rafter, D. Michael Crenshaw, Paul J. Wiita·Sep 23, 2008SaveLearn
Integral Field Spectroscopy of HH 262: The Spectral AtlasHH 262 is a group of emitting knots displaying an "hour-glass" morphology in the Halpha and [SII] lines, located 3.5' to the northeast of the young stellar object L1551-IRS5, in Taurus.…R. Lopez, B. Garcia-Lorenzo, S. F. Sanchez et al.·Sep 23, 2008SaveLearn
First 450-micron dust continuum mapping of the massive star-forming region NGC 3576 with the P-ArTeMiS bolometer cameraContext: The earliest phases of massive star formation are currently much debated. Aims. In an effort to make progress, we took a census of Class0-like protostellar dense cores in the NGC 3576…P. André, V. Minier, P. Gallais et al.·Sep 23, 2008SaveLearn
Centimeter-wave continuum radiation from the rho Ophiuchi molecular cloudThe rho Oph molecular cloud is undergoing intermediate-mass star formation. UV radiation from its hottest young stars heats and dissociates exposed layers, but does not ionize hydrogen. Only faint…Simon Casassus, Clive Dickinson, Kieran Cleary et al.·Sep 23, 2008SaveLearn
Gamma Ray Bursts and the Fermi Gamma Ray Space Telescope: Notes to the La Plata LecturesGamma-ray bursts (GRBs) are a mixed class of sources consisting of, at least, the long duration and short-hard subclasses, the X-ray flashes, and the low-luminosity GRBs. In all cases, the release of…Charles D. Dermer, Chris L. Fryer·Sep 23, 2008SaveLearn
Efficient Photometric Selection of Quasars from the Sloan Digital Sky Survey: II. ~1,000,000 Quasars from Data Release SixWe present a catalog of 1,172,157 quasar candidates selected from the photometric imaging data of the Sloan Digital Sky Survey (SDSS). The objects are all point sources to a limiting magnitude of…Gordon T. Richards, Adam D. Myers, Alexander G. Gray et al.·Sep 23, 2008SaveLearn
CO Fundamental Emission from V836 TauWe present high resolution 4.7 micron CO fundamental spectroscopy of V836 Tau, a young star with properties that are between those of classical and weak T Tauri stars and which may be dissipating its…Joan R. Najita, Nathan Crockett, John S. Carr·Sep 23, 2008SaveLearn
Anisotropic Models of Dark HalosAn iterative approach is used to construct spherically symmetric equilibrium models with an anisotropic velocity distribution. The potentialities of the method have been tested on models with known…N. Ya. Sotnikova, S. A. Rodionov·Sep 23, 2008SaveLearn
Probing the Galactic Bulge with deep Adaptive Optics imaging: the age of NGC 6440We present first results of a pilot project aimed at exploiting the potentiality of ground based adaptive optics imaging in the near infrared to determine the age of stellar clusters in the Galactic…L. Origlia, S. Lena, E. Diolaiti et al.·Sep 23, 2008SaveLearn