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Astrophysics papers — page 166

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Dissipative Structures in Supersonic Turbulence
We show that density-weighted moments of the dissipation rate, εl, averaged over a scale l, in supersonic turbulence can be successfully explained by the She and Lévêque model [Phys. Rev. Lett.…
Liubin Pan, Paolo Padoan, Alexei G. KritsukAug 9, 2008
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Single-flavor CSL phase in compact stars
We suggest a scenario where the three light quark flavors are sequentially deconfined under increasing pressure in cold asymmetric nuclear matter as e.g. in neutron stars. The basis for our analysis…
David Blaschke, Fredrik Sandin, Thomas Klahn et al.Aug 9, 2008
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Co-evolution of elliptical galaxies and their central black holes. Clues from their scaling laws
After the discovery that supermassive black holes (SMBHs) are ubiquitous at the center of stellar spheroids and that their mass Mbh, in the range 106-109 Msun, is tightly related to global…
L. CiottiAug 9, 2008
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A red supergiant nebula at 25 micron: arcsecond scale mass-loss asymmetries of mu Cep
We present diffraction limited (0.6") 24.5micron Subaru/COMICS images of the red supergiant mu Cep. We report the detection of a circumstellar nebula, that was not detected at shorter…
W. J. de Wit, R. D. Oudmaijer, T. Fujiyoshi et al.Aug 9, 2008
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Clustering Properties of Low-Luminosity Star-Forming galaxies at z = 0.24 and 0.40 in the Subaru Deep Field
We present our analysis on the clustering properties of star-forming galaxies selected by narrow-band excesses in the Subaru Deep Field. Specifically we focus on Halpha emitting galaxies at z = 0.24…
Aki Nakajima, Yasuhiro Shioya, Tohru Nagao et al.Aug 9, 2008
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Caught in formation: the nuclear-cluster-to-be in NGC 2139
Close to its center, the bulgeless galaxy NGC 2139 hosts a star cluster that is younger and less massive than any actual nuclear star cluster (NC) studied so far. We have measured the H-alpha…
David R. Andersen, C. Jakob Walcher, Torsten Boeker et al.Aug 8, 2008
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X-ray Spectral Identification of Three Candidate Quiescent Low-Mass X-ray Binaries in the Globular Cluster NGC 6304
We report the search for low-mass X-ray binaries in quiescence (qLMXBs) in the globular cluster NGC 6304 using XMM observations. We present the spectral analysis leading to the identification of…
Sebastien Guillot, Robert E. Rutledge, Lars Bildsten et al.Aug 8, 2008
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Adiabatic fluctuations from cosmic strings in a contracting universe
We show that adiabatic, super-Hubble, and almost scale invariant density fluctuations are produced by cosmic strings in a contracting universe. An essential point is that isocurvature perturbations…
Robert H. Brandenberger, Tomo Takahashi, Masahide YamaguchiAug 8, 2008
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Delayed X-ray emission from fallback in compact-object mergers
When double neutron star or neutron star-black hole binaries merge, the final remnant may comprise a central solar-mass black hole surrounded by a 0.01-0.1 solar masses torus. The subsequent…
Elena M. Rossi, Mitchell C. BegelmanAug 8, 2008
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Constraints on the High-Density Nuclear Equation of State from Neutron Star Observables
Depending on the density reached in the cores of neutron stars, such objects may contain stable phases of novel matter found nowhere else in the Universe. This article gives a brief overview of these…
David Blaschke, Thomas Klaehn, Fridolin WeberAug 8, 2008
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Simulating radiation and kinetic processes in relativistic plasmas
Modelling the emission properties of compact high energy sources such as X-ray binaries, AGN or gamma-ray bursts represents a complex problem. Contributions of numerous processes participate non…
R. Belmont, J. Malzac, A. MarcowithAug 8, 2008
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Scale Dependent Galaxy Bias in the SDSS as a function of Luminosity and Colour
It has been known for a long time that the clustering of galaxies changes as a function of galaxy type. This galaxy bias acts as a hindrance to the extraction of cosmological information from the…
James G. Cresswell, Will J. PercivalAug 8, 2008
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Magnetic Fields In Astrophysical Objects
Magnetic fields are known to reside in many astrophysical objects and are now believed to be crucially important for the creation of phenomena on a wide variety of scales. However, the role of the…
L. J. SilversAug 8, 2008
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Physics of collisionless phase mixing
Previous studies of phase mixing of ion cyclotron (IC), Alfvénic, waves in the collisionless regime have established the generation of parallel electric field and hence acceleration of electrons in…
D. Tsiklauri, T. HarukiAug 8, 2008
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Testing backreaction effects with observations
In order to quantitatively test the ability of averaged inhomogeneous cosmologies to correctly describe observations of the large scale properties of the Universe, we introduce a smoothed template…
Julien Larena, Jean--Michel Alimi, Thomas Buchert et al.Aug 8, 2008
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Charged Black Holes in Phantom Cosmology
In the classical relativistic regime, the accretion of phantom-like dark energy onto a stationary black hole reduces the mass of black hole. Here we have investigated the accretion of phantom energy…
Mubasher Jamil, Muneer Ahmad Rashid, Asghar QadirAug 8, 2008
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AMBER Task Force February 2008 run report
AMBER was installed in March 2004 in the VLTI focal lab of the VLT observatory in Cerro Paranal run by ESO. Since then, there have been 4 commissioning runs and additional VLTI infrastructure…
F. Malbet, G. Duvert, A. Chelli et al.Aug 8, 2008
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Testing the Dark-Energy-Dominated Cosmology by the Solar-System Experiments
According to the recent astronomical data, the most part of energy in the Universe is in the 'dark' form, which is effectively described by Lambda-term in Einstein equations. All arguments in…
Yurii V. DuminAug 8, 2008
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The Future Evolution of White Dwarf Stars Through Baryon Decay and Time Varying Gravitational Constant
Motivated by the possibility that the fundamental ``constants'' of nature could vary with time, this paper considers the long term evolution of white dwarf stars under the combined action of…
Jacob A. Ketchum, Fred C. AdamsAug 8, 2008
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High-Resolution Spectroscopy of Long-Periodic Eclipsing Binary Epsilon Aurigae
The results of spectroscopic observations of long-periodic eclipsing binary Epsilon Aur are reported. The observations were carried out during 2 nights in 2007 at 2-meter telescope located at the…
Alex Golovin, Yuliana Kuznyetsova, Maxim AndreevAug 8, 2008
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Emergent Exoplanet Flux: Review of the Spitzer Results
Observations using the Spitzer Space Telescope provided the first detections of photons from extrasolar planets. Spitzer observations are allowing us to infer the temperature structure, composition,…
Drake DemingAug 8, 2008
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Stability of Galactic Gaseous Disks and the Formation of Massive Clusters
We study gravitational instabilities in disks, with special attention to the most massive clumps that form because they are expected to be the progenitors of globular-type clusters. The maximum…
Andres Escala, Richard B. LarsonAug 8, 2008
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The Co-evolution of Galaxies, Black Holes, and AGN in a Hierarchical Universe
The observational link between Supermassive Black Holes (SMBH) and galaxies at low redshift seems to be very tight, and statistically the global evolution of star formation activity and BH accretion…
Rachel S. SomervilleAug 8, 2008
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Modeling Carbon Chain Anions in L1527
The low-mass protostellar region L1527 is unusual because it contains observable abundances of unsaturated carbon-chain molecules including CnH radicals, H2Cn carbenes, cyanopolyynes, and the…
Nanase Harada, Eric HerbstAug 8, 2008
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The beginning of cosmic ray astronomy
We discuss the anisotropic arrival directions of the ultra high energy cosmic rays detected by Auger which I consider one of the biggest discoverie in astrophysics during the last year.
Todor StanevAug 8, 2008
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