The BAST algorithm for transit detectionThe pioneer space mission for photometric exoplanet searches, CoRoT, steadily monitors about 12000 stars in each of its fields of view. Transit detection algorithms are applied to derive promising…S. Renner, H. Rauer, A. Erikson et al.·Oct 27, 2008SaveLearn
Head-Tail Galaxies: Beacons of High-Density Regions in ClustersUsing radio data at 1.4 GHz from the ATCA we identify five head-tail (HT) galaxies in the central region of the Horologium-Reticulum Supercluster (HRS). Physical parameters of the HT galaxies were…Minnie Y. Mao, Melanie Johnston-Hollitt, Jamie B. Stevens et al.·Oct 27, 2008SaveLearn
The drive system of the Major Atmospheric Gamma-ray Imaging Cherenkov TelescopeThe MAGIC telescope is an imaging atmospheric Cherenkov telescope, designed to observe very high energy gamma-rays while achieving a low energy threshold. One of the key science goals is fast…T. Bretz, D. Dorner, R. M. Wagner et al.·Oct 27, 2008SaveLearn
Cosmic Constraint on Ricci Dark Energy ModelIn this paper, a holographic dark energy model, dubbed Ricci dark energy, is confronted with cosmological observational data from type Ia supernovae (SN Ia), baryon acoustic oscillations (BAO) and…Lixin Xu, Wenbo Li, Jianbo Lu et al.·Oct 26, 2008SaveLearn
Discovery of a very high energy gamma-ray signal from the 3C 66A/B regionThe MAGIC telescope observed the region around the distant blazar 3C 66A for 54.2 h in 2007 August-December. The observations resulted in the discovery of a gamma-ray source at energies above 150 GeV…MAGIC Collaboration, E. Aliu·Oct 26, 2008SaveLearn
Ultra High Energy Cosmic Rays from earth-based observatoriesIn this paper, prepared for the Physics in Collisions 2008 Conference, the most recent results on UHECRs from earth-based observatories are exposed and reviewed.Sergio Petrera·Oct 26, 2008SaveLearn
The Transit Light Curve Project. X. A Christmas Transit of HD 17156bPhotometry is presented of the Dec. 25, 2007 transit of HD 17156b, which has the longest orbital period and highest orbital eccentricity of all the known transiting exoplanets. New measurements of…Joshua N. Winn, Matthew J. Holman, Gregory W. Henry et al.·Oct 26, 2008SaveLearn
Powering the Jets in NGC1052We have studied the inner regions of the LINER galaxy NGC1052 since the mid 1990s at high resolution with 15 GHz very-long-baseline interferometry observations. A compact, two-sided jet structure is…Eduardo Ros, Matthias Kadler·Oct 26, 2008SaveLearn
Kinematics of AGN JetsThe fine-scale structure and the kinematics of relativistic active galactic nuclei (AGN) jets have been studied by very-long-baseline interferometry at very high resolutions since 1998 at 2 cm…Eduardo Ros·Oct 26, 2008SaveLearn
A Cr-K emission line survey in young supernova remnants with ChandraWe performed a Cr-K emission line survey in young supernova remnants (SNRs) with the Chandra archival data. Our sample includes W49B, Cas A, Tycho and Kepler. We confirmed the existence of the Cr…X. J. Yang, H. Tsunemi, F. J. Lu et al.·Oct 26, 2008SaveLearn
Monitoring stellar orbits around the Massive Black Hole in the Galactic CenterWe present the results of 16 years of monitoring stellar orbits around the massive black hole in center of the Milky Way using high resolution NIR techniques. This work refines our previous analysis…S. Gillessen, F. Eisenhauer, S. Trippe et al.·Oct 26, 2008SaveLearn
The HARPS search for southern extra-solar planets XVII. Six long-period giant planets around BD -17 0063, HD 20868, HD 73267, HD 131664, HD 145377, HD 153950We report the discovery of six new substellar companions of main-sequence stars, detected through multiple Doppler measurements with the instrument HARPS installed on the ESO 3.6m telescope, La…C. Moutou, M. Mayor, G. Lo Curto et al.·Oct 26, 2008SaveLearn
Non-linear Study of Bell's Cosmic Ray Current-driven InstabilityThe cosmic ray current-driven (CRCD) instability, predicted by Bell (2004), consists of non-resonant, growing plasma waves driven by the electric current of cosmic rays (CRs) that stream along the…Mario A. Riquelme, Anatoly Spitkovsky·Oct 26, 2008SaveLearn
Algorithmic comparisons of decaying, isothermal, supersonic turbulenceContradicting results have been reported in the literature with respect to the performance of the numerical techniques employed for the study of supersonic turbulence. We aim at characterising the…S. Kitsionas, C. Federrath, R. Klessen et al.·Oct 25, 2008SaveLearn
Abell 1201: The anatomy of a cold front cluster from combined optical and X-ray dataWe present a combined X-ray and optical analysis of the cold front cluster Abell 1201 using archival Chandra, data and multi-object spectroscopy taken with the 3.9m Anglo Australian and 6.5m Multiple…Matt S. Owers, Paul E. J. Nulsen, Warrick J. Couch et al.·Oct 25, 2008SaveLearn
Structure function of the UV variability of Q0957+561We present a detailed structure function analysis of the UV variability of Q0957+561. From new optical observations, we constructed normalized structure functions of the quasar luminosity at…L. J. Goicoechea, V. N. Shalyapin, R. Gil-Merino et al.·Oct 25, 2008SaveLearn
Globular Cluster Populations in Four Early-Type Poststarburst GalaxiesWe present a study of the globular cluster systems of four early-type poststarburst galaxies using deep g and I-band images from the ACS camera aboard the Hubble Space Telescope (HST). All the…Aparna Maybhate, Paul Goudfrooij, Francois Schweizer et al.·Oct 25, 2008SaveLearn
New two-colour light curves of Q0957+561: time delays and the origin of intrinsic variationsWe extend the gr-band time coverage of the gravitationally lensed double quasar Q0957+561. New gr light curves permit us to detect significant intrinsic fluctuations, to determine new time delays,…V. N. Shalyapin, L. J. Goicoechea, E. Koptelova et al.·Oct 25, 2008SaveLearn
Effects of accretion flow on the chemical structure in the inner regions of protoplanetary disksWe have studied the dependence of the profiles of molecular abundances and line emission on the accretion flow in the hot ( 100K) inner region of protoplanetary disks. The gas-phase reactions…H. Nomura, Y. Aikawa, Y. Nakagawa et al.·Oct 25, 2008SaveLearn
X-ray spectral states of microquasarsWe discuss the origin of the dramatically different X-ray spectral shapes observed in the Low Hard State (LHS: dominated by thermal comptonisation) and the High Soft State (HSS: dominated by the…Julien Malzac, Renaud Belmont·Oct 25, 2008SaveLearn
Periodicities in the high-mass X-ray binary system RX J0146.9+6121/LS I+61 235The high-mass X-ray binary RX J0146.9+6121, with optical counterpart LS I+61 235 (V831 Cas), is an intriguing system on the outskirts of the open cluster NGC 663. It contains the slowest X-ray pulsar…Gordon E. Sarty, Laszlo L. Kiss, Richard Huziak et al.·Oct 25, 2008SaveLearn
A slowly accreting ~10 Myr old transitional disk in Orion OB1aHere we present the Spitzer IRS spectrum of CVSO 224, the sole transitional disk located within the ~10 Myr old 25 Orionis group in Orion OB1a. A model fit to the spectral energy distribution of this…C. Espaillat, J. Muzerolle, J. Hernandez et al.·Oct 25, 2008SaveLearn
Detection of Hard X-Rays from the Compton-Thick Seyfert 2 Galaxy NGC 2273 with SuzakuWe have obtained a broad-band spectrum of the Compton-thick Seyfert 2 galaxy NGC 2273 with Suzaku. The spectrum reveals the first detection of hard X-rays above ~10 keV from NGC 2273. The broad-band…H. Awaki, Y. Terashima, Y. Higaki et al.·Oct 25, 2008SaveLearn
Observational 5-20μm Interstellar Extinction Curves Toward Star-Forming Regions Derived from Spitzer IRS SpectraUsing Spitzer Infrared Spectrograph observations of G0--M4 III stars behind dark clouds, I construct 5-20μm empirical extinction curves for 0.3≤ AK<7, which is equivalent to AV…M. K. McClure·Oct 24, 2008SaveLearn
Sakurai's Object: characterising the near-infrared CO ejecta between 2003 and 2007We present observations of Sakurai's Object obtained at 1-5um between 2003 and 2007. By fitting a radiative transfer model to an echelle spectrum of CO fundamental absorption features around 4.7um,…H L. Worters, M. T. Rushton, S. P. S. Eyres et al.·Oct 24, 2008SaveLearn