Discovery of Extreme Carbon Stars in the Large Magellanic CloudUsing Spitzer IRAC and MIPS observations of the Large Magellanic Cloud, we have identified 13 objects that have extremely red mid-IR colors. Follow-up Spitzer IRS observations of seven of these…R. A. Gruendl, Y. -H. Chu, J. P. Seale et al.·Sep 30, 2008SaveLearn
Kinematics of planetary nebulae in the outskirts of the elliptical galaxy NGC 4697We describe the implementation of slitless radial velocity measurements of extragalactic planetary nebulae (PNs) with the 8.2 m Subaru telescope and its Cassegrain imaging spectrograph, FOCAS. As a…R. H. Mendez, A. M. Teodorescu, R. -P. Kudritzki et al.·Sep 30, 2008SaveLearn
Star Formation Rates and Metallicities of K-selected Star Forming Galaxies at z~2We present spectroscopy of 15 star-forming BzK galaxies (sBzKs) with K(AB)<23 in the Subaru Deep Field, for which Halpha and some other emission lines are detected in 0.9 to 2.3 micron spectra with a…Masao Hayashi, Kentaro Motohara, Kazuhiro Shimasaku et al.·Sep 30, 2008SaveLearn
Coronal lines and dust formation in SN 2005ip: Not the brightest, but the hottest Type IIn supernovaWe present optical photometry and spectroscopy of SN2005ip for the first 3yr after discovery, showing an underlying Type II-L SN interacting with a steady wind to yield an unusual Type IIn spectrum.…Nathan Smith, Jeffrey M. Silverman, Ryan Chornock et al.·Sep 29, 2008SaveLearn
Application of a Self-Similar Pressure Profile to Sunyaev-Zel'dovich Effect Data from Galaxy ClustersWe investigate the utility of a new, self-similar pressure profile for fitting Sunyaev-Zel'dovich (SZ) effect observations of galaxy clusters. Current SZ imaging instruments - such as the…T. Mroczkowski, M. Bonamente, J. E. Carlstrom et al.·Sep 29, 2008SaveLearn
Dark Matter Structures In The Deep Lens SurveyWe present a regularized maximum likelihood weak lensing reconstruction of the Deep Lens Survey F2 field (4 deg2). High signal-to-noise ratio peaks in our lensing significance map appear to be…Jeffrey M. Kubo, Hossein Khiabanian, Ian P. Dell'Antonio et al.·Sep 29, 2008SaveLearn
Did Saturn's rings form during the Late Heavy Bombardment ?The origin of Saturn\' s massive ring system is still unknown. Two popular scenarios - the tidal splitting of passing comets and the collisional destruction of a satellite - rely on a high…Sebastien Charnoz, Alessandro Morbidelli, Luke H. Dones et al.·Sep 29, 2008SaveLearn
A multi-wavelength study of a double intermediate-mass protostar - from large-scale structure to collimated jets(abridged) We study a previously discovered protostellar source that is deeply embedded and drives an energetic molecular outflow. The source, UYSO1, is located close to IRAS 07029-1215 at a distance…Jan Forbrich, Thomas Stanke, Randolf Klein et al.·Sep 29, 2008SaveLearn
Hypercompact Stellar Systems Around Recoiling Supermassive Black HolesA supermassive black hole ejected from the center of a galaxy by gravitational wave recoil carries a retinue of bound stars - a "hypercompact stellar system" (HCSS). The numbers and…David Merritt, Jeremy D. Schnittman, Stefanie Komossa·Sep 29, 2008SaveLearn
The Impact of Neutrino Magnetic Moments on the Evolution of Massive StarsWe explore the sensitivity of massive stars to neutrino magnetic moments. We find that the additional cooling due to the neutrino magnetic moments bring about qualitative changes to the structure and…Alexander Heger, Alexander Friedland, Maurizio Giannotti et al.·Sep 29, 2008SaveLearn
Ray-tracing through the Millennium Simulation: Born corrections and lens-lens coupling in cosmic shear and galaxy-galaxy lensing(abridged) We study the accuracy of various approximations to cosmic shear and weak galaxy-galaxy lensing and investigate effects of Born corrections and lens-lens coupling. We use ray-tracing…S. Hilbert, J. Hartlap, S. D. M. White et al.·Sep 29, 2008SaveLearn
Multicolour photometry of the M0V+M5V eclipsing binary V405 AndWe present multicolour photometry and modelling of the active eclipsing binary star V405 And. The components of 0.2 and 0.5 solar masses are just below and above the theoretical limit of the full…K. Vida, K. Olah, Zs. Kovari et al.·Sep 29, 2008SaveLearn
WMAP 5-year constraints on time variation of α and me in a detailed recombination scenarioWe study the role of fundamental constants in an updated recombination scenario. We focus on the time variation of the fine structure constant, and the electron mass in the early Universe, and put…Claudia G. Scóccola, Susana. J. Landau, Hector Vucetich·Sep 29, 2008SaveLearn
Gamma-ray halo around 3C 279: looking through the Sun on the 8th of OctoberWe discuss how the solar occultations of bright sources of energetic gamma rays can be used to extract non-trivial physical and astrophysical information, including the angular size of the image when…Malcolm Fairbairn, Timur Rashba, Sergey Troitsky·Sep 29, 2008SaveLearn
Glued CaWO4 Detectors for the CRESST-II ExperimentThe Cryogenic Rare Event Search with Superconducting Thermometers Phase II (CRESST-II) at the L.N.G.S in Italy is searching for Dark Matter using low-temperature calorimeters. These detectors allow…Michael Kiefer, Franz Pröbst, Godehard Angloher et al.·Sep 29, 2008SaveLearn
High-excitation molecular gas in local luminous AGN hostsWe used the mm/sub-mm receivers on the James Clerk Maxwell Telescope (JCMT) to observe the CO J=3--2, 2--1 lines in five local, optically powerful AGN and the J=4--3 line in 3C 293 (a powerful radio…Padeli P. Papadopoulos, A. Kovacs, A. S. Evans et al.·Sep 29, 2008SaveLearn
Cosmological perturbationsWe review the study of inhomogeneous perturbations about a homogeneous and isotropic background cosmology. We adopt a coordinate based approach, but give geometrical interpretations of metric…Karim A. Malik, David Wands·Sep 29, 2008SaveLearn
Evolution of density perturbations in decaying vacuum cosmology: The case of non-zero perturbations in the cosmological termWe extend the results of a previous paper where a model of interacting dark energy, with a cosmological term decaying linearly with the Hubble parameter, is tested against the observed mass power…H. A. Borges, S. Carneiro, J. C. Fabris·Sep 29, 2008SaveLearn
Ultra-Compact Dwarf Candidates Near the Lensing Galaxy in Abell S0740We analyze three-band HST/ACS imaging data of the giant elliptical galaxy ESO325-G004. This is the nearest known strongly lensing galaxy, and it resides in the center of the poor cluster Abell S0740…John P. Blakeslee, Regina Barber DeGraaff·Sep 29, 2008SaveLearn
The Carina Nebula: A Laboratory for Feedback and Triggered Star FormationThe Carina Nebula (NGC 3372) is our richest nearby laboratory in which to study feedback through UV radiation and stellar winds from very massive stars during the formation of an OB association, at…Nathan Smith, Kate J. Brooks·Sep 29, 2008SaveLearn
The Recent Star Formation Histories of M81 Group Dwarf Irregular GalaxiesWe present observations and analysis of nine dwarf irregular galaxies (dIs) in the M81 Group taken with the Advanced Camera for Surveys aboard the Hubble Space Telescope. The nine galaxy sample (the…Daniel R. Weisz, Evan D. Skillman, John M. Cannon et al.·Sep 29, 2008SaveLearn
The Chandra Deep Protocluster Survey: Evidence for an Enhancement in the AGN Activity in the SSA22 Protocluster at z = 3.09We present results from a new ultra-deep 400 ks Chandra observation of the SSA22 protocluster at z = 3.09. We have studied the X-ray properties of 234 z ~ 3 Lyman break galaxies (LBGs; protocluster…B. D. Lehmer, D. M. Alexander, J. E. Geach et al.·Sep 29, 2008SaveLearn
A New Method for Estimating Dark Matter Halo Masses using Globular Cluster SystemsAll galaxies are thought to reside within large halos of dark matter, whose properties can only be determined from indirect observations. The formation and assembly of galaxies is determined from the…Lee R. Spitler, Duncan A. Forbes·Sep 29, 2008SaveLearn
A joint model for the emission and absorption properties of damped Lyman alpha absorption systemsThe recently discovered population of ultra-faint extended line emitters can account for the majority of the incidence rate of Damped Lyman Alpha systems (DLAs) at z ~ 3 if the line emission is…Luke A. Barnes, Martin G. Haehnelt·Sep 29, 2008SaveLearn
Spatially Resolved Spectroscopy of Sub-AU-Sized Regions of T Tauri and Herbig Ae/Be DisksWe present spatially resolved near-IR spectroscopic observations of 15 young stars. Using a grism spectrometer behind the Keck Interferometer, we obtained an angular resolution of a few…J. A. Eisner, J. R. Graham, R. L. Akeson et al.·Sep 29, 2008SaveLearn