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Wolf-Rayet Central Stars of Planetary Nebulae: Their Evolution and Properties
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/24
Over the past decade, the number of planetary nebula central stars (CSPN) known to exhibit the Wolf-Rayet (WR) phenomenon has grown substantially. Many of these discoveries have resulted from the Macq...
Protoplanetary disc evolution and dispersal: the implications of X-ray photoevaportion
Solar and Stellar Astrophysics (astro-ph.SR) Earth and Planetary Astrophysics (astro-ph.EP)
2010/12/24
We explore the role of X-ray photoevaporation in the evolution and dispersal of viscously evolving T-Tauri discs. We show that the X-ray photoevaporation wind rates scale linearly with X-ray luminosit...
Quantum Vacuum influence on the evolution of Pulsars
Solar and Stellar Astrophysics (astro-ph.SR) Quantum Physics (quant-ph)
2010/12/23
In this letter we show that Quantum Vacuum Friction (QVF) should play an important role in neutron star evolution. Taking into account this effect we show that magnetars could be understood as a natur...
Dirac neutrino magnetic moment and a possible time evolution of the neutrino signal from a supernova
High Energy Astrophysical Phenomena (astro-ph.HE) High Energy Physics - Phenomenology (hep-ph)
2010/12/23
We analyze the influence of neutrino helicity conversion, $\nu_L \to \nu_R$, on the neutrino flux from a supernova caused by the interaction of the Dirac neutrino magnetic moment with a magnetic field...
Evolution of twist-shear and dip-shear in Faring active region NOAA 10930
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/23
We study the evolution of magnetic shear angle in a flare productive active region NOAA 10930. The magnetic shear angle is defined as the deviation in the orientation of the observed magnetic field ve...
A Chandra Census of C2D YSOS: Evolution of X-ray Emission
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/24
We present an analytical study of a large sample of ~109 young stellar objects in the X-ray. Our objects were detected in X-ray independent of age. Unexpectedly, the X-ray energy is somewhat correlate...
Cosmological evolution of massive black holes: effects of Eddington ratio distribution and quasar lifetime
Galaxy Astrophysics (astro-ph.GA)
2010/12/22
A power-law time-dependent lightcurve for active galactic nuclei (AGNs) is expected by the self-regulated black hole growth scenario, in which the feedback of AGNs expels gas and shut down accretion. ...
Cosmological evolution of massive black holes: effects of Eddington ratio distribution and quasar lifetime
Galaxy Astrophysics (astro-ph.GA)
2010/12/22
A power-law time-dependent lightcurve for active galactic nuclei (AGNs) is expected by the self-regulated black hole growth scenario, in which the feedback of AGNs expels gas and shut down accretion. ...
Thermal evolution and interior models of the transiting super-Earth GJ 1214b
Earth and Planetary Astrophysics (astro-ph.EP)
2010/12/23
The planet GJ 1214b is the second known super-Earth with a measured mass and radius. Orbiting a quiet M-star, it receives considerably less mass-loss driving X-ray and UV radiation than CoRoT-7b, so t...
Evolution of intermediate mass galaxies up to z~0.7 and studies of SNe Ia hosts
Evolution of intermediate mass galaxies studies of SNe Ia hosts
2010/11/12
My life is like a Babel tower: it is spread among severals european countries, France, Spain and Portugal. My acknowledgments cannot thus escape to be multi-language.
The Evolution of Vector Magnetic Field Associated with Major Flares in NOAA AR10656
Magnetic field evolution flares
2010/9/15
In this paper, we study the evolution of vector magnetic field of AR 10656 by using the observations of Huairou Solar Observing Station (HSOS, China) and Big Bear Solar Observatory (BBSO, USA).The mag...
The Effect of Screening Factors and Thermonuclear Reaction Rates in the Pre-main Sequence Evolution of Low Mass Stars
Low mass stars thermonuclear reaction rates electron screening factors composition changes
2010/9/15
In understanding the nucleosynthesis of the elements in stars,one of the most important quantities is the reaction rate and it must be evaluated in terms of the stellar temperature T , and its determi...
THE SMALL-SCALE STRUCTURE OF THE MAGELLANIC STREAM AS A FOUNDATION FOR GALAXY EVOLUTION
Galaxy: halo Galaxies: evolution Magellanic Clouds Hydrodynamics Instabilities
2010/10/29
The Magellanic Stream (MS) is the nearest example of a gaseous
trail formed by interacting galaxies. While the substantial gas masses in these kinds
of circumgalactic structures are postulated to re...
Proposed cosmological surveys will make use of photometric redshifts of galaxies that are significantly fainter than any complete spectroscopic redshift surveys that exist to train the photo-z methods...
Unraveling Binary Evolution from Gravitational-Wave Signals and Source Statistics
Gravitational Waves Binary Evolution Neutron Stars Black Holes
2010/3/19
The next generation of ground-based gravitational-wave detectors are likely to observe gravitational waves from the coalescences of compact-objects binaries. We describe the state of the art for predi...