FERMI GBM detections of four AXPs at soft gamma-rays
... SWIFT SWIFT gamma-ray burst mission XRT X-Ray Telescope ...
... SWIFT SWIFT gamma-ray burst mission XRT X-Ray Telescope ...
Untitled - METU Astrophysics Home Page
... calculations of neutron star mass and radii. However, the first observational evidence of a rotation powered pulsar hasn’t come until 1967, when Bell detected radio pulsations from outside the solar system which later was understood to be the first detection of a pulsar by the humankind. Following t ...
... calculations of neutron star mass and radii. However, the first observational evidence of a rotation powered pulsar hasn’t come until 1967, when Bell detected radio pulsations from outside the solar system which later was understood to be the first detection of a pulsar by the humankind. Following t ...
The importance of radiative feedback for the stellar initial mass
... between two sink particles was Newtonian for r ≥ 4 au, but was softened within this radius using spline softening (Benz 1990). The maximum acceleration occurred at a distance of ≈1 au; therefore, this was the minimum separation that a binary could have even if, in reality, the binary’s orbit would h ...
... between two sink particles was Newtonian for r ≥ 4 au, but was softened within this radius using spline softening (Benz 1990). The maximum acceleration occurred at a distance of ≈1 au; therefore, this was the minimum separation that a binary could have even if, in reality, the binary’s orbit would h ...
Y.Ueda_Future_HE_Mission2006 - X
... Observations of Obscured Black Holes Yoshihiro Ueda (Department of Astronomy, Kyoto University) ...
... Observations of Obscured Black Holes Yoshihiro Ueda (Department of Astronomy, Kyoto University) ...
White dwarfmain sequence binaries identified within SDSS DR7 and
... (dark cluster) and some main-sequence stars (background, faint cluster) in the u − g versus g − r and g − r versus r − i colour– colour diagrams, but our main cut is the r − i versus i − z diagram; this is because we try to find a large and unbiased WDMS sample within the SDSS. Meanwhile, we want to ...
... (dark cluster) and some main-sequence stars (background, faint cluster) in the u − g versus g − r and g − r versus r − i colour– colour diagrams, but our main cut is the r − i versus i − z diagram; this is because we try to find a large and unbiased WDMS sample within the SDSS. Meanwhile, we want to ...
Invited Review The Beginning and Evolution of the Universe
... of (called baryonic matter by cosmologists) being a very small tracer on this dark sea, and with electromagnetic radiation being an even less significant contributor. Galaxies and groups and clusters of galaxies are locally distributed inhomogeneously in space, but on large enough scales and in a st ...
... of (called baryonic matter by cosmologists) being a very small tracer on this dark sea, and with electromagnetic radiation being an even less significant contributor. Galaxies and groups and clusters of galaxies are locally distributed inhomogeneously in space, but on large enough scales and in a st ...
The DRIFT Dark Matter Project - School of Physics and Astronomy
... Through the use of a Monte Carlo simulation the neutron and gamma-ray background experienced by DRIFT has been determined and the experimental implications assessed. In addition, the activity of the main neutron calibration source used to calibrate DRIFT modules has been measured and was found to be ...
... Through the use of a Monte Carlo simulation the neutron and gamma-ray background experienced by DRIFT has been determined and the experimental implications assessed. In addition, the activity of the main neutron calibration source used to calibrate DRIFT modules has been measured and was found to be ...
Global Properties of Solar Flares
... in common use include the soft X-ray energy flux in the standard GOES spectral bands of 1-8Å and 0.54Å. The more traditional Hα classification the flare importance by area and visual brightness. Table 1 gives a quick overview of these classifications. It should be noted that most of the extensive ...
... in common use include the soft X-ray energy flux in the standard GOES spectral bands of 1-8Å and 0.54Å. The more traditional Hα classification the flare importance by area and visual brightness. Table 1 gives a quick overview of these classifications. It should be noted that most of the extensive ...
A Detection Method for Small Kuiper Belt Objects: The Search for
... by a given small object, such as a known comet or an asteroid, is quite difficult because the small angular size of the object prevents a precise prediction of the shadow path (cf. prediction of occultations by Pholus in Stone et al. 1999). The possibility of detecting small objects of the Solar Sys ...
... by a given small object, such as a known comet or an asteroid, is quite difficult because the small angular size of the object prevents a precise prediction of the shadow path (cf. prediction of occultations by Pholus in Stone et al. 1999). The possibility of detecting small objects of the Solar Sys ...
Massive Star Formation in the Galactic Center
... 3. Present-day star formation in the GC Present-day star formation in the GC is somewhat subdued compared to the episodes that produced the massive clusters we now see. A dozen or so ultra-compact HII regions are distributed throughout the central 50 pc, each containing one or a few O-stars still em ...
... 3. Present-day star formation in the GC Present-day star formation in the GC is somewhat subdued compared to the episodes that produced the massive clusters we now see. A dozen or so ultra-compact HII regions are distributed throughout the central 50 pc, each containing one or a few O-stars still em ...
Formation and stability of planetary orbits in binary systems
... gravitomagnetism. The system consists of IM Pegasi A, a K-type red giant star with a mass of 1.8 solar masses (M from hereon) and a sun-like G-type main sequence star with a mass of 1.0M , IM Pegasi B. Prior to this thesis, research done by Berdyugina et al. pointed towards the existence of a plan ...
... gravitomagnetism. The system consists of IM Pegasi A, a K-type red giant star with a mass of 1.8 solar masses (M from hereon) and a sun-like G-type main sequence star with a mass of 1.0M , IM Pegasi B. Prior to this thesis, research done by Berdyugina et al. pointed towards the existence of a plan ...
Binary progenitor models of type IIb supernovae
... evolution code. We identify the limited range of initial orbital periods and mass ratios required to produce type IIb binary progenitors. The rate we predict from our standard models, which assume conservative mass transfer, is about six times smaller than the current rate indicated by observations. ...
... evolution code. We identify the limited range of initial orbital periods and mass ratios required to produce type IIb binary progenitors. The rate we predict from our standard models, which assume conservative mass transfer, is about six times smaller than the current rate indicated by observations. ...
The ultracompact nature of the black hole candidate X
... narrow-band photometry, they suggested the system might be a UCXB. They further inferred an orbital period of ∼ 25 min, from a correlation between quiescent X-ray luminosity and time-averaged mass transfer rate from the companion, and using calculations of the time-averaged mass transfer rate at dif ...
... narrow-band photometry, they suggested the system might be a UCXB. They further inferred an orbital period of ∼ 25 min, from a correlation between quiescent X-ray luminosity and time-averaged mass transfer rate from the companion, and using calculations of the time-averaged mass transfer rate at dif ...
µ = / F c
... We see that if c2 < c1 , R is negative; that is, there is a phase change at reflection. If c2 = c1 (i.e. if there is only one sort of rope) there is no reflection (because there is no boundary!). In the above analysis, we considered a simple sine wave. However, any function, even a nonperiodic funct ...
... We see that if c2 < c1 , R is negative; that is, there is a phase change at reflection. If c2 = c1 (i.e. if there is only one sort of rope) there is no reflection (because there is no boundary!). In the above analysis, we considered a simple sine wave. However, any function, even a nonperiodic funct ...
bob_neutrino_EPS04
... considered as non self-consistent single particle processes. We describe neutrino streaming instabilities within supernovæ plasmas, resulting in longitudinal and transverse waves using coupled kinetic equations for both neutrinos and plasma particles including magnetic field effects. The transverse ...
... considered as non self-consistent single particle processes. We describe neutrino streaming instabilities within supernovæ plasmas, resulting in longitudinal and transverse waves using coupled kinetic equations for both neutrinos and plasma particles including magnetic field effects. The transverse ...