A Stellar Dynamical Measurement of the Black Hole Mass in the Maser Galaxy NGC 4258We determine the mass of the black hole at the center of the spiral galaxy NGC 4258 by constructing axisymmetric dynamical models of the galaxy. These models are constrained by high spatial…Christos Siopis, Karl Gebhardt, Tod R. Lauer et al.·Aug 28, 2008SaveLearn
Emergence of a Quasar OutflowWe report the first discovery of the emergence of a high-velocity broad-line outflow in a luminous quasar, J105400.40+034801.2 at redshift z ~ 2.1. The outflow is evident in ultraviolet CIV and SiIV…F. Hamann, K. F. Kaplan, P. Rodriguez Hidalgo et al.·Aug 28, 2008SaveLearn
Modeling Mass-Loss and Infrared Excess in Large Magellanic Cloud CepheidsThe purpose of this preliminary work is to determine if Large Magellanic Cloud (LMC) Cepheids have stellar winds. If a Cepheid undergoes mass loss then at some distance from the star, a fraction of…Hilding R. Neilson, Chow-Choong Ngeow, Shashi M. Kanbur et al.·Aug 28, 2008SaveLearn
Atmospheric composition and structure of HD209458bTransiting planets like HD209458b offer a unique opportunity to scrutinize their atmospheric composition and structure. Transit spectroscopy probes the transition region between the day and night…J. -M. Désert, A. Vidal-Madjar, A. Lecavelier des Etangs et al.·Aug 28, 2008SaveLearn
X-ray and UV spectroscopy of Galactic diffuse hot gas along the LMC X--3 sight lineWe present Suzaku spectra of X-ray emission in the fields just off the LMC X-3 sight line. OVII, OVIII, and NeIX emission lines are clearly detected, suggesting the presence of an optically thin…Y. Yao, Q. D. Wang, T. Hagihara et al.·Aug 28, 2008SaveLearn
Calibrating a novel type of bolometer arrays for the Herschel/PACS PhotometerThe Herschel Space Observatory is a corner stone mission of the European Space Agency (ESA) scientific program. With its spatial resolution, sensitivity and spectral range (60 to 670 microns)…Nicolas Billot·Aug 28, 2008SaveLearn
Pulsations of the Low Mass ZZ Ceti Star HS 1824+6000Measuring g-mode pulsations of isolated white dwarfs can reveal their interior properties to high precision. With a spectroscopic mass of ~0.51 M (log g = 7.82), the DAV white dwarf HS…Justin D. R. Steinfadt, Lars Bildsten, Eran O. Ofek et al.·Aug 28, 2008SaveLearn
Investigations of the magnetospheric plasma distribution in the vicinity of a pulsar - I Basic formulationThe magnetospheric plasma distribution in the vicinity of a pulsar at various inclination angles is investigated using a new relativistic, parallel 3D Particle-In-Cell (PIC) code DYMPHNA3D. DYMPHNA3D…John Mc Donald, Andrew Shearer·Aug 28, 2008SaveLearn
Population III.1 stars: formation, feedback and evolution of the IMFI discuss current theoretical expectations of how primordial, Pop III.1 stars form. Lack of direct observational constraints makes this a challenging task. In particular predicting the mass of these…Jonathan C. Tan·Aug 28, 2008SaveLearn
Rebound Shock Breakouts of Exploding Massive Stars: A MHD Void ModelWith a self-similar magnetohydrodynamic (MHD) model of an exploding progenitor star and an outgoing rebound shock and with the thermal bremsstrahlung as the major radiation mechanism in X-ray bands,…Ren-Yu Hu, Yu-Qing Lou·Aug 28, 2008SaveLearn
Exploring the Nuclear Environment of the NLS1 Galaxy Arakelian 564 with XMM-Newton RGSWe present an accurate characterisation of the high-resolution X-ray spectrum of the Narrow Line Seyfert 1 galaxy Arakelian 564 and put it in to context with other objects of its type by making a…R. A. N. Smith, M. J. Page, G. Branduardi-Raymont·Aug 28, 2008SaveLearn
Nature and Nurture in Dark Matter HalosCosmological simulations consistently predict specific properties of dark matter halos, but these have not yet led to a physical understanding that is generally accepted. This is especially true for…R. N. Henriksen·Aug 28, 2008SaveLearn
New composite models of partially ionized protoplanetary disksWe study an accretion disk in which three different regions may coexist: MHD turbulent regions, dead zones and gravitationally unstable regions. Although the dead zones are stable, there is some…Caroline E. J. M. L. J. Terquem·Aug 28, 2008SaveLearn
Kinematics of the H2O masers at the centre of the PN K3-35We have studied the kinematics traced by the water masers located at the centre of the planetary nebula (PN) K3-35, using data from previous Very Large Array (VLA) observations. An analysis of the…L. Uscanga, Y. Gómez, A. C. Raga et al.·Aug 28, 2008SaveLearn
The Multiwavelength Picture of Star Formation in the Very Young Open Cluster NGC6383We review the properties of the very young (2 Myr) open cluster NGC6383. The cluster is dominated by the massive binary HD159176 (O7V + O7V). The distance to NGC6383 is consistently found to be 1.3…Gregor Rauw, Michaël De Becker·Aug 28, 2008SaveLearn
Stars and gas in the Medusa mergerThe Medusa (NGC 4194) is a well-studied nearby galaxy with the disturbed appearance of a merger and evidence for ongoing star formation. In order to test whether it could be the result of an…E. Manthey, S. Huettemeister, S. Aalto et al.·Aug 28, 2008SaveLearn
Measuring Outer Disk Warps with Optical SpectroscopyWarps in the outer gaseous disks of galaxies are a ubiquitous phenomenon, but it is unclear what generates them. One theory is that warps are generated internally through spontaneous bending…Daniel Christlein, Joss Bland-Hawthorn·Aug 28, 2008SaveLearn
Catalogue of 12CO(J=1-0) and 13CO(J=1-0) Molecular Clouds in the Carina Flare SupershellWe present a catalogue of 12CO(J=1-0) and 13CO(J=1-0) molecular clouds in the spatio-velocity range of the Carina Flare supershell, GSH 287+04-17. The data cover a region of ~66 square degrees and…J. R. Dawson, A. Kawamura, N. Mizuno et al.·Aug 28, 2008SaveLearn
Suzaku Observations of SGR 1900+14 and SGR 1806-20Spectral and timing studies of Suzaku ToO observations of two SGRs, 1900+14 and 1806-20, are presented. The X-ray quiescent emission spectra were well fitted by a two blackbody function or a…Yujin E. Nakagawa, Tatehiro Mihara, Atsumasa Yoshida et al.·Aug 28, 2008SaveLearn
Radio observations of Jupiter-family cometsRadio observations from decimetric to submillimetric wavelengths are now a basic tool for the investigation of comets. Spectroscopic observations allow us i) to monitor the gas production rate of the…J. Crovisier, N. Biver, D. Bockelée-Morvan et al.·Aug 28, 2008SaveLearn
The Young Cluster and Star Forming Region NGC 2264NGC 2264 is a young Galactic cluster and the dominant component of the Mon OB1 association lying approximately 760 pc distant within the local spiral arm. The cluster is hierarchically structured,…S. E. Dahm·Aug 28, 2008SaveLearn
A Disk of Young Stars at the Galactic Center as Determined by Individual Stellar OrbitsWe present new proper motions from the 10 m Keck telescopes for a puzzling population of massive, young stars located within 3.5" (0.14 pc) of the supermassive black hole at the Galactic Center.…J. R. Lu, A. M. Ghez, S. D. Hornstein et al.·Aug 28, 2008SaveLearn
Exoplanet characterization with long slit spectroscopyExtrasolar planets observation and characterization by high contrast imaging instruments is set to be a very important subject in observational astronomy. Dedicated instruments are being developed to…Arthur Vigan, Maud Langlois, Claire Moutou et al.·Aug 28, 2008SaveLearn
NGC 2362: The Terminus of Star FormationNGC 2362 is a richly populated Galactic cluster, devoid of natal molecular gas and dust. The cluster represents the final product of the star forming process and hosts an unobscured and near-complete…S. E. Dahm·Aug 28, 2008SaveLearn
Subaru Weak Lensing survey -- II: Multi-object Spectroscopy and Cluster MassesWe present the first results of a MOS campaign to follow up cluster candidates located via weak lensing. Our main goals are to search for spatial concentrations of galaxies that are plausible optical…Takashi Hamana, Satoshi Miyazaki, Nobunari Kashikawa et al.·Aug 28, 2008SaveLearn