Black hole tidal problem in the Fermi normal coordinates
... where r denotes the orbital separation and µcrit is a constant ≈ 10–20 which depends on r/M , R/M , spin of the black hole, and equations of state (see Sec. V). If the condition (1) is satisfied outside a minimum orbital radius (e.g., r = 6GM/c2 for a star in a circular orbit around a Schwarzschild ...
... where r denotes the orbital separation and µcrit is a constant ≈ 10–20 which depends on r/M , R/M , spin of the black hole, and equations of state (see Sec. V). If the condition (1) is satisfied outside a minimum orbital radius (e.g., r = 6GM/c2 for a star in a circular orbit around a Schwarzschild ...
paper - Harvard-Smithsonian Center for Astrophysics
... that of the 235151.7 MHz transition for the outflow sources A, B, and C. Due to the lack of emission from the 235151.7 MHz line in the vicinity of source D, the 236216.7 MHz line was used instead to calculate line ratios. Fits to our data are presented as the χ 2 statistic p-value for each assumed v ...
... that of the 235151.7 MHz transition for the outflow sources A, B, and C. Due to the lack of emission from the 235151.7 MHz line in the vicinity of source D, the 236216.7 MHz line was used instead to calculate line ratios. Fits to our data are presented as the χ 2 statistic p-value for each assumed v ...
Neutron Cross Section Standards for the Energy Region Above 20
... polarized neutron beam in addition a polarized hydrogen target. For completeness, some representative neutron-proton capture data are included. ...
... polarized neutron beam in addition a polarized hydrogen target. For completeness, some representative neutron-proton capture data are included. ...
Studies of dark matter in and around stars
... in every day life. The gravitational effects of this dark matter have been observed in many different ways but its true nature is still unknown. In most models, dark matter particles can annihilate with each other into standard model particles; the direct or indirect observation of such annihilation ...
... in every day life. The gravitational effects of this dark matter have been observed in many different ways but its true nature is still unknown. In most models, dark matter particles can annihilate with each other into standard model particles; the direct or indirect observation of such annihilation ...
Identifying Young far from Giant Stars Molecular Clouds
... features to the stellar spectra. When this boundary material heats up as it accretes onto the star, it radiates, contributing its own continuum to the stellar spectrum. When the material is heated, the electrons in the layer's hydrogen atoms are excited to higher energy levels. However, the electron ...
... features to the stellar spectra. When this boundary material heats up as it accretes onto the star, it radiates, contributing its own continuum to the stellar spectrum. When the material is heated, the electrons in the layer's hydrogen atoms are excited to higher energy levels. However, the electron ...
Magnetized Quark and Strange Quark Matter in the Spherical Symmetric Space-Time Admitting Conformal Motion
... density, (c) chiral symmetry restoration and (d) gives stable uncharged β-stable strange matter. These EOSs have later been approximated to a linear form by [50] which has the from, ...
... density, (c) chiral symmetry restoration and (d) gives stable uncharged β-stable strange matter. These EOSs have later been approximated to a linear form by [50] which has the from, ...
Research Report for 2015/2016
... Laboratory Experiments: Hartigan continued a collaboration with scientists at Los Alamos, Rochester, Imperial College, and AWE to study shock waves in collimated jets using highpowered lasers. Funded by the DOE, one project uses the Omega laser to launch jets and observe what happens when strong sho ...
... Laboratory Experiments: Hartigan continued a collaboration with scientists at Los Alamos, Rochester, Imperial College, and AWE to study shock waves in collimated jets using highpowered lasers. Funded by the DOE, one project uses the Omega laser to launch jets and observe what happens when strong sho ...
The birth rate of subluminous and overluminous type Ia supernovae
... star formation (see the review by Hillebrandt & Niemeyer 2000). Generally, the WD mass at the moment of explosion is equal for the SD model (the so-called Chandrasekhar mass model) or less than the Chandrasekhar limit (the sub-Chandrasekhar mass model), while larger than the limit for DD model (supe ...
... star formation (see the review by Hillebrandt & Niemeyer 2000). Generally, the WD mass at the moment of explosion is equal for the SD model (the so-called Chandrasekhar mass model) or less than the Chandrasekhar limit (the sub-Chandrasekhar mass model), while larger than the limit for DD model (supe ...
The importance of radiative feedback for the stellar initial mass
... temperatures, the gas density and the gas opacity. We use interpolation from the opacity tables of Pollack, McKay & Christofferson (1985) to provide the interstellar grain opacities for solar metallicity molecular gas, whilst at higher temperatures when the grains have been destroyed we use the tabl ...
... temperatures, the gas density and the gas opacity. We use interpolation from the opacity tables of Pollack, McKay & Christofferson (1985) to provide the interstellar grain opacities for solar metallicity molecular gas, whilst at higher temperatures when the grains have been destroyed we use the tabl ...
Paper 3 (pdf)
... E-vector – ∼ 106 cm. The extent of polarized radiation from the surface of a neutron star increases by up to an order of magnitude when QED propagation effects are included in the calculation. The extent of polarization increases with the strength of the magnetic field and decreases as the radius in ...
... E-vector – ∼ 106 cm. The extent of polarized radiation from the surface of a neutron star increases by up to an order of magnitude when QED propagation effects are included in the calculation. The extent of polarization increases with the strength of the magnetic field and decreases as the radius in ...
A Herschel/HIFI study of Water in Two Intermediate
... of life. An investigation into the physical and chemical properties of a star forming environment may assist not only an investigation into the beginning of life, but possibly also where to look for it. The picture for low-mass (0.02-2 M⊙ ) star formation is far more developed than that of high-mass ...
... of life. An investigation into the physical and chemical properties of a star forming environment may assist not only an investigation into the beginning of life, but possibly also where to look for it. The picture for low-mass (0.02-2 M⊙ ) star formation is far more developed than that of high-mass ...
Radiation Damage In Scientific Charge
... imaging devices have been the preferred detectors of astronomers since then, and exist in many different versions to suit the needs of various astronomical purposes. CCDs are commonly flown in space, for instance as the main detection instrument on several well known missions such as the Hubble Spac ...
... imaging devices have been the preferred detectors of astronomers since then, and exist in many different versions to suit the needs of various astronomical purposes. CCDs are commonly flown in space, for instance as the main detection instrument on several well known missions such as the Hubble Spac ...
chemical compositions of rv tauri stars and related objects
... single stars; in fact, RVa objects are known to have binary companions, e.g., AC Her (see van Winckel et al. 1998) and RU Cen (see Maas, van Winckel, & Waelkens 2002). From a comprehensive study of RV Tauri binaries, van Winckel et al. (1999); Maas et al. (2002) proposed that the RV Tauri photometri ...
... single stars; in fact, RVa objects are known to have binary companions, e.g., AC Her (see van Winckel et al. 1998) and RU Cen (see Maas, van Winckel, & Waelkens 2002). From a comprehensive study of RV Tauri binaries, van Winckel et al. (1999); Maas et al. (2002) proposed that the RV Tauri photometri ...
Compact High-Redshift Galaxies Are the Cores of the Most Massive
... much as a factor ∼ 6 smaller than low-redshift galaxies of comparable mass. Given the apparent absence of low-redshift counterparts, this has often been interpreted as indicating that the high density, compact red galaxies must be “puffed up” by some mechanism. We compare the ensemble of high-redshi ...
... much as a factor ∼ 6 smaller than low-redshift galaxies of comparable mass. Given the apparent absence of low-redshift counterparts, this has often been interpreted as indicating that the high density, compact red galaxies must be “puffed up” by some mechanism. We compare the ensemble of high-redshi ...
The effect of dark matter capture on binary stars
... is the driving force behind this project. In this project I have modelled collisions between WIMPs and atomic nuclei, via the weak interaction. Combined with an N-body simulation, I have been able to model WIMP capture in both single stars and binary systems. This work has led to a number of interes ...
... is the driving force behind this project. In this project I have modelled collisions between WIMPs and atomic nuclei, via the weak interaction. Combined with an N-body simulation, I have been able to model WIMP capture in both single stars and binary systems. This work has led to a number of interes ...
Tuomas Kangas
... system also has a profound effect on the evolution of the system, and this too can be investigated through SNe. As massive stars are rare to begin with and the time they spend in their final stages relatively very brief, this final part of a massive star’s life remains poorly understood. Thus SNe ar ...
... system also has a profound effect on the evolution of the system, and this too can be investigated through SNe. As massive stars are rare to begin with and the time they spend in their final stages relatively very brief, this final part of a massive star’s life remains poorly understood. Thus SNe ar ...
Neutron Data Booklet
... Scattering lengths can be deduced from total cross section measurements, but for this evaluation a lot of corrections are necessary. Therefore, techniques for a more direct determination of coherent scattering lengths have been developed which are based on neutron optical phenomena. A great variety ...
... Scattering lengths can be deduced from total cross section measurements, but for this evaluation a lot of corrections are necessary. Therefore, techniques for a more direct determination of coherent scattering lengths have been developed which are based on neutron optical phenomena. A great variety ...
Detectors for Quality Assurance in Hadrontherapy Departament de Fisica Doctoral Thesis
... invade nearby parts of the body leading to further loss of organ function and when left untreated, death of the patient. In some cases, the cancerous cells may also spread to more distant parts of the body, either through the bloodstream or lymphatic system in a process known as metastasis. Understa ...
... invade nearby parts of the body leading to further loss of organ function and when left untreated, death of the patient. In some cases, the cancerous cells may also spread to more distant parts of the body, either through the bloodstream or lymphatic system in a process known as metastasis. Understa ...
Complex organic molecules along the accretion flow in isolated and
... COMs in these sources is that simple ices formed on grain surfaces at 10 K (e.g., CO, H2 O, NH3 , CH4 , and CH3 OH) undergo warming to ≈ 20 – 30 K (caused by the ignition of the embedded star) where the grain-surface molecules achieve sufficient mobility for radical-radical association to form more ...
... COMs in these sources is that simple ices formed on grain surfaces at 10 K (e.g., CO, H2 O, NH3 , CH4 , and CH3 OH) undergo warming to ≈ 20 – 30 K (caused by the ignition of the embedded star) where the grain-surface molecules achieve sufficient mobility for radical-radical association to form more ...
lecture course: nmr spectroscopy - UZH
... The frequency ω is expressed in terms of a angular velocity (see additional material). It is specific for the kind of nucleus and therefore has a different value for 1H,13C,19F etc. The precession frequency ...
... The frequency ω is expressed in terms of a angular velocity (see additional material). It is specific for the kind of nucleus and therefore has a different value for 1H,13C,19F etc. The precession frequency ...
Clusters: age scales for stellar physics
... imposed some limits since it was already known that Earth was much older, and the energy emission rate of the Sun was therefore not sustainable. Therefore, some new mechanism laid behind. What physicists did not know was that complete new branch of physics was at hand: relativity and quantum mechani ...
... imposed some limits since it was already known that Earth was much older, and the energy emission rate of the Sun was therefore not sustainable. Therefore, some new mechanism laid behind. What physicists did not know was that complete new branch of physics was at hand: relativity and quantum mechani ...
How special are brightest group and cluster galaxies?
... voffset<4σv,cl AND without strong Hα emission. ...
... voffset<4σv,cl AND without strong Hα emission. ...
P-nuclei
p-Nuclei (p stands for proton-rich) are certain proton-rich, naturally occurring isotopes of some elements between selenium and mercury which cannot be produced in either s- or r-process.