And the Rest: The Stellar Archeological Record of M82 Outside the Central StarburstDeep images obtained with MegaCam and WIRCam on the Canada-France-Hawaii Telescope are used to probe the stellar content outside of the central star-forming regions of M82. Stars evolving on the…T. J. Davidge·Oct 5, 2008SaveLearn
On the chemistry and distribution of HOC+ in M82: More evidence for extensive PDRsThe molecular gas composition in the inner 1 kpc disk of the starburst galaxy M82 resembles that of Galactic Photon Dominated Regions (PDRs). In particular, large abundances of the reactive ions HOC+…A. Fuente, S. Garcia-Burillo, A. Usero et al.·Oct 5, 2008SaveLearn
Optical Characterization of a New Young Stellar Population in the Serpens Molecular CloudWe report on the results of an optical spectroscopic survey designed to confirm the youth and determine the spectral types among a sample of young stellar object (YSO) candidates in the Serpens…Isa Oliveira, Bruno Merin, Klaus M. Pontoppidan et al.·Oct 5, 2008SaveLearn
Near-Infrared [Fe II] and H2 Line Observations of the Supernova Remnant 3C 396: Probing the Pre-supernova Circumstellar MaterialsWe present the results of near-infrared [Fe II] and H2 line imaging and spectroscopic observations of the supernova remnant 3C 396 using the Palomar 5 m Hale telescope. We detect long, filamentary…Ho-Gyu Lee, Dae-Sik Moon, Bon-Chul Koo et al.·Oct 5, 2008SaveLearn
Magnetically-Regulated Fragmentation Induced by Nonlinear Flows and Ambipolar DiffusionWe present a parameter study of simulations of fragmentation regulated by gravity, magnetic fields, ambipolar diffusion, and nonlinear flows. The thin-sheet approximation is employed with periodic…Shantanu Basu, Glenn E. Ciolek, Wolf Dapp et al.·Oct 4, 2008SaveLearn
A search for disk-galaxy lenses in the Sloan Digital Sky SurveyWe present the first automated spectroscopic search for disk-galaxy lenses, using the Sloan Digital Sky Survey database. We follow up eight gravitational lens candidates, selected among a sample of…Chloé Féron, Jens Hjorth, John P. McKean et al.·Oct 4, 2008SaveLearn
Cosmology from AntarcticaObservation of the CMB is central to observational cosmology, and the Antarctic Plateau is an exceptionally good site for this work. The first attempt at CMB observations from the Plateau was an…Robert W. Wilson, Antony A. Stark·Oct 4, 2008SaveLearn
A Spectacular Hα Complex in Virgo: Evidence for a Collision Between M86 and NGC 4438 and Implications for Collisional ISM Heating of EllipticalsDeep wide-field Hα+[NII] imaging around the Virgo cluster giant elliptical galaxy M86 reveals a highly complex and disturbed ISM/ICM. The most striking feature is a set of Hα filaments which…J. D. P. Kenney, T. Tal, H. H. Crowl et al.·Oct 3, 2008SaveLearn
Multi-wavelength Observations of LS I +61 303 with VERITAS, Swift and RXT E: 2006-2008A long term, multi-wavelength monitoring campaign on the TeV binary LS I +61 303 has been performed utilizing >300 GeV observations with VERITAS along with monitoring in the 0.2-10 keV band by RXTE…A. W. Smith·Oct 3, 2008SaveLearn
VERITAS Observations of Mgro J1908+06/Hess J1908+063The unidentified TeV gamma-ray source MGRO J1908+06/HESS J1908+063 was observed with the VERITAS Imaging Atmospheric Cherenkov Array during October 2007 and May-June 2008. This extended source is…John E Ward·Oct 3, 2008SaveLearn
Recollimation and Radiative Focusing of Relativistic Jets: Applications to Blazars and M87Recent observations of M87 and some blazars reveal violent activity in small regions located at relatively large distances from the central engine. Motivated by these considerations, we study the…Omer Bromberg, Amir Levinson·Oct 3, 2008SaveLearn
SMEI observations of previously unseen pulsation frequencies in gamma DoradusAims: As g-mode pulsators, gamma-Doradus-class stars may naively be expected to show a large number of modes. Taking advantage of the long photometric time-series generated by the Solar Mass Ejection…N. J. Tarrant, W. J. Chaplin, Y. P. Elsworth et al.·Oct 3, 2008SaveLearn
Stochastic excitation of nonradial modes II. Are solar asymptotic gravity modes detectable?Detection of solar gravity modes remains a major challenge to our understanding of the innerparts of the Sun. Their frequencies would enable the derivation of constraints on the core physical…K. Belkacem, R. Samadi, M. J. Goupil et al.·Oct 3, 2008SaveLearn
Recent Results from Super-KamiokandeThe recent results on the oscillation analyses of solar neutrino and the atmospheric neutrino measurements in Super-Kamiokande are presented. Recent status of the detector is also reported.H. Sekiya·Oct 3, 2008SaveLearn
Direct Imaging of Fine Structure in the Chromosphere of a Sunspot UmbraHigh-resolution imaging observations from the Hinode spacecraft in the CaII H line are employed to study the dynamics of the chromosphere above a sunspot. We find that umbral flashes and other…H. Socas-Navarro, S. W. McIntosh, R. Centeno et al.·Oct 3, 2008SaveLearn
Recent from IceCubeIceCube is a 1 km3 neutrino detector now being built at the South Pole. Its 4800 optical modules will detect Cherenkov radiation from charged particles produced in neutrino interactions. IceCube…Spencer R. Klein·Oct 3, 2008SaveLearn
CFHTLS weak-lensing constraints on the neutrino massesWe use measurements of cosmic shear from CFHTLS, combined with WMAP-5 cosmic microwave background anisotropy data, baryonic acoustic oscillations from SDSS and 2dFGRS and supernovae data from SNLS…Ismael Tereno, Carlo Schimd, Jean-Philippe Uzan et al.·Oct 3, 2008SaveLearn
Chasing highly obscured QSOs in the COSMOS field(abridged) We take advantage of the deep Chandra and Spitzer coverage of a large area (more than 10 times the area covered by the Chandra deep fields, CDFs in the COSMOS field, to extend the search…F. Fiore, S. Puccetti, M. Brusa et al.·Oct 3, 2008SaveLearn
The Highly Unusual Chemical Composition of the Hercules Dwarf Spheroidal GalaxyWe report on the abundance analysis of two red giants in the faint Hercules dwarf spheroidal (dSph) galaxy. These stars show a remarkable deficiency in the neutron-capture elements, while the…A. Koch, A. McWilliam, E. K. Grebel et al.·Oct 3, 2008SaveLearn
Dark Matter in the Galaxy Cluster CL J1226+3332 at Z=0.89We present a weak-lensing analysis of the galaxy cluster CL J1226+3332 at z=0.89 using Hubble Space Telescope Advanced Camera for Surveys images. The cluster is the hottest (>10 keV), most X-ray…M. J. Jee, J. A. Tyson·Oct 3, 2008SaveLearn
Forming Early-type Galaxies in Groups Prior to Cluster AssemblyWe study a unique proto-cluster of galaxies, the supergroup SG1120-1202. We quantify the degree to which morphological transformation of cluster galaxies occurs prior to cluster assembly in order to…Stefan J. Kautsch, Anthony H. Gonzalez, Christian A. Soto et al.·Oct 3, 2008SaveLearn
Gravitational Stability of Boson StarsWe investigate the stability of general-relativistic boson stars by classifying singularities of differential mappings and compare it with the results of perturbation theory. Depending on the…Fjodor V. Kusmartsev, Eckehard W. Mielke, Franz E. Schunck·Oct 3, 2008SaveLearn
Non-thermal emission from Galaxy Clusters and future observations with the FERMI gamma-ray telescope and LOFARFERMI (formely GLAST) and LOFAR will shortly provide crucial information on the non-thermal components (relativistic particles and magnetic field) in galaxy clusters. After discussing observational…G. Brunetti·Oct 3, 2008SaveLearn
Galactic Compact Objects Section of the White Paper on the Status and Future of Ground-based TeV Gamma-ray AstronomyThis is a report on the findings of the Galactic compact objects working group for the white paper on the status and future of TeV gamma-ray astronomy. The white paper is an APS commissioned…P. Kaaret, A. A. Abdo, J. Arons et al.·Oct 3, 2008SaveLearn
The Globular Cluster NGC 5286. I. A New CCD BV Color-Magnitude DiagramWe present BV photometry of the Galactic globular cluster NGC 5286, based on 128 V frames and 133 B frames, and covering the entire face of the cluster. Our photometry reaches almost two magnitudes…M. Zorotovic, M. Catelan, M. Zoccali et al.·Oct 3, 2008SaveLearn