Physics of Neutron Star Crusts
... opportunities. The elementary constituents of the matter are neutrons, protons, and electrons – like in the atomic matter around us. The density is “subnuclear”, so that the methods developed and successfully applied in the last decades to terrestrial nuclear physics can be applied to neutron star c ...
... opportunities. The elementary constituents of the matter are neutrons, protons, and electrons – like in the atomic matter around us. The density is “subnuclear”, so that the methods developed and successfully applied in the last decades to terrestrial nuclear physics can be applied to neutron star c ...
Physics of Neutron Star Crusts - Institut d`Astronomie et d
... resulting from pressure, a solid crust can support an elastic strain. Elastic properties are reviewed in Section 7. A separate subsection is devoted to the elastic parameters of the so-called “pasta” layers which behave like liquid crystals. The inner crust is permeated by a neutron superfluid. Vario ...
... resulting from pressure, a solid crust can support an elastic strain. Elastic properties are reviewed in Section 7. A separate subsection is devoted to the elastic parameters of the so-called “pasta” layers which behave like liquid crystals. The inner crust is permeated by a neutron superfluid. Vario ...
The Physics of Background Discrimination in Liquid Xenon, and First Results from Xenon10 in the Hunt for WIMP Dark Matter
... We also build a simple recombination model that successfully reproduces the mean recombination in electron and nuclear recoils, including the the surprising reversal of the expected trend for recombination with ionization density in low energy electron recoils. The model also reproduces the measured ...
... We also build a simple recombination model that successfully reproduces the mean recombination in electron and nuclear recoils, including the the surprising reversal of the expected trend for recombination with ionization density in low energy electron recoils. The model also reproduces the measured ...
Particle kinematics in solar flares: observations - ETH E
... In X-rays, the Sun looks completely different from what we are used to by observing it with backyard telescopes. Fig. 1.2 shows the changing face of the Sun observed in visible light, Hα, UV and X-rays. The peak of the solar irradiance is in the optical light, which constitutes mostly of continuum e ...
... In X-rays, the Sun looks completely different from what we are used to by observing it with backyard telescopes. Fig. 1.2 shows the changing face of the Sun observed in visible light, Hα, UV and X-rays. The peak of the solar irradiance is in the optical light, which constitutes mostly of continuum e ...
Fundamentals in Nuclear Physics
... is beautifully described in many books, such as The Nuclear Many Body Problem by P. Ring and P Schuck. Intentionally, we have not gone into such developments. In fact, even if nuclear physics had stopped, say, in 1950 or 1960, practically all of its applications would exist nowadays. These applicati ...
... is beautifully described in many books, such as The Nuclear Many Body Problem by P. Ring and P Schuck. Intentionally, we have not gone into such developments. In fact, even if nuclear physics had stopped, say, in 1950 or 1960, practically all of its applications would exist nowadays. These applicati ...
Slides - Indico
... -We are in the “Precision Era” of Cosmology. BBN parameters, such as Wb, Yp, (D/H)p are known with high (and increasing) precision. Uncertainties of calculations are often limited by the poor knowledge of the cross section of few reaction, at BBN energies. -Accurate measurements at low energy must b ...
... -We are in the “Precision Era” of Cosmology. BBN parameters, such as Wb, Yp, (D/H)p are known with high (and increasing) precision. Uncertainties of calculations are often limited by the poor knowledge of the cross section of few reaction, at BBN energies. -Accurate measurements at low energy must b ...
Numerical solution of the radiative transfer equation: X
... where γk ∝ λ2k and λ2k is the kth-eigenvalue of the space operator. The Comptonization spectrum is mostly dominated by the first eigenvalue (see Fig. 3 in TMK97), while the terms Nk (x) with k ≥ 2 represent the fraction of photons that leave the medium without appreciable energy-exchange. Starting f ...
... where γk ∝ λ2k and λ2k is the kth-eigenvalue of the space operator. The Comptonization spectrum is mostly dominated by the first eigenvalue (see Fig. 3 in TMK97), while the terms Nk (x) with k ≥ 2 represent the fraction of photons that leave the medium without appreciable energy-exchange. Starting f ...
The physics of neutron stars
... Ginzburg and co-workers greatly contributed to the elucidation of the nature of radio pulsars – cosmic sources of periodic radio pulses: they first developed the model of oscillating white dwarfs [10, 11], and later the models of rotating neutron stars with strong magnetic fields [12–14]; in these s ...
... Ginzburg and co-workers greatly contributed to the elucidation of the nature of radio pulsars – cosmic sources of periodic radio pulses: they first developed the model of oscillating white dwarfs [10, 11], and later the models of rotating neutron stars with strong magnetic fields [12–14]; in these s ...
PHY 380L Introduction to Plasma Physics Richard Fitzpatrick
... also occasionally absorbs and distorts radio waves. For instance, the Earth’s magnetic field causes waves with different polarizations (relative to the orientation of the magnetic field) to propagate at different velocities, an effect which can give rise to “ghost signals” (i.e., signals which arri ...
... also occasionally absorbs and distorts radio waves. For instance, the Earth’s magnetic field causes waves with different polarizations (relative to the orientation of the magnetic field) to propagate at different velocities, an effect which can give rise to “ghost signals” (i.e., signals which arri ...
The Plasma Physics Processes that Drive Ring Current
... explore and question. Finally, I would like to thank my fellow physicist and husband, Jonathan Wrobel, for his unwavering support, guidance, and understanding. He has taught me that anything is possible with enough planning, creativity, organization and determination. ...
... explore and question. Finally, I would like to thank my fellow physicist and husband, Jonathan Wrobel, for his unwavering support, guidance, and understanding. He has taught me that anything is possible with enough planning, creativity, organization and determination. ...
Heating and Cooling of Neutron Star Crusts
... With the launch of Chandra and XMM, many new and exciting observations of neutron stars are being made. Some of these observations have detected transient neutron stars cooling into quiescence. Transient neutron stars are a class of objects which are observed to go through accretion outburst periods ...
... With the launch of Chandra and XMM, many new and exciting observations of neutron stars are being made. Some of these observations have detected transient neutron stars cooling into quiescence. Transient neutron stars are a class of objects which are observed to go through accretion outburst periods ...
SOLAR HARD X-RAY AND GAMMA-RAY OBSERVATIONS FROM
... e.g., Ramaty & Murphy 1987 for a review). If the spectrum of accelerated ions extends above a few hundred MeV nucleons -1 , the energetic neutrons produced in nuclear reactions ...
... e.g., Ramaty & Murphy 1987 for a review). If the spectrum of accelerated ions extends above a few hundred MeV nucleons -1 , the energetic neutrons produced in nuclear reactions ...
No Slide Title
... one of the other neutrino “flavours” – Neutrino matter oscillations – electron neutrinos get converted to muon or tau neutrinos and these could not be detected by the early neutrino detectors! ...
... one of the other neutrino “flavours” – Neutrino matter oscillations – electron neutrinos get converted to muon or tau neutrinos and these could not be detected by the early neutrino detectors! ...
bob_neutrino_EPS04
... problem. Neutrino interactions with matter are usually 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 part ...
... problem. Neutrino interactions with matter are usually 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 part ...
Scaling of collision strengths for highly
... somewhat large CI/CC expansion, up to the atomic shell n = 8. At low temperatures, the effects of the resonances is not significant. This is expected for strong dipole transitions, where the background is large in comparison. As we pointed out in Fernández-Menchero et al. (2015), the R-matrix calcul ...
... somewhat large CI/CC expansion, up to the atomic shell n = 8. At low temperatures, the effects of the resonances is not significant. This is expected for strong dipole transitions, where the background is large in comparison. As we pointed out in Fernández-Menchero et al. (2015), the R-matrix calcul ...
Spectral and Hydrodynamic Modeling of X-Ray Michael Rosenberg
... different from those in a collisional plasma. Like the ionization process itself, excited state population in collisional plasmas arise from electron-ion collisions. More specifically, at high temperatures, collisional ionization will be balanced by dielectronic recombination, wherein the excess ene ...
... different from those in a collisional plasma. Like the ionization process itself, excited state population in collisional plasmas arise from electron-ion collisions. More specifically, at high temperatures, collisional ionization will be balanced by dielectronic recombination, wherein the excess ene ...
Physics of the Interstellar and Intergalactic Medium
... 2.1 Consider an electron-proton plasma at temperature T . Let ts (e − e) be the time scale for 90 degree scattering of one electron with kinetic energy ∼ kT by encounters with other electrons. The electron-proton mass ratio mp /me = 1836. The following time scales tx will differ from ts (e − e) by f ...
... 2.1 Consider an electron-proton plasma at temperature T . Let ts (e − e) be the time scale for 90 degree scattering of one electron with kinetic energy ∼ kT by encounters with other electrons. The electron-proton mass ratio mp /me = 1836. The following time scales tx will differ from ts (e − e) by f ...
Inhomogeneous cloud coverage through the Coulomb explosion of
... A plasma is defined as a quasineutral gas of charged and neutral particles which exhibit collective behaviour (Chen 1984). Locally, the entirety of the gas does not need to be ionized for it to behave as a plasma. As long as the collective, long-range electromagnetic influence of the many distant ch ...
... A plasma is defined as a quasineutral gas of charged and neutral particles which exhibit collective behaviour (Chen 1984). Locally, the entirety of the gas does not need to be ionized for it to behave as a plasma. As long as the collective, long-range electromagnetic influence of the many distant ch ...
Author`s personal copy - Institute of Physics Belgrade Roundcube
... A certain interest for the processes of aerosol forming in conditions of geocosmos can represent and the effect of solid particles of micron size forming in collisions of optically excited alkali atoms with hydrogen (Tam et al., 1977). The rate of the collisional ionization processes in an absorbing ...
... A certain interest for the processes of aerosol forming in conditions of geocosmos can represent and the effect of solid particles of micron size forming in collisions of optically excited alkali atoms with hydrogen (Tam et al., 1977). The rate of the collisional ionization processes in an absorbing ...
Neutron Stars – Cooling and Transport
... Recently, 2D simulations of the fully coupled thermal and magnetic field evolution have been possible (Pons et al. 2009; Viganò et al. 2013), mostly motivated by the increasing number of observed magnetars and high magnetic field pulsars. The theory of thermal evolution of neutron stars has differe ...
... Recently, 2D simulations of the fully coupled thermal and magnetic field evolution have been possible (Pons et al. 2009; Viganò et al. 2013), mostly motivated by the increasing number of observed magnetars and high magnetic field pulsars. The theory of thermal evolution of neutron stars has differe ...
STELLAR ABLATION OF PLANETARY ATMOSPHERES
... theoretical models and global simulations [Winglee, 1998; Lyon et al., 2004; Siscoe et al., 2002b; Gombosi et al., 2003; Raeder et al., 1997; Ashour-Abdalla et al., 1997]. The preference is clearly for simulations that run faster than real time on available computer hardware, leading to limitations ...
... theoretical models and global simulations [Winglee, 1998; Lyon et al., 2004; Siscoe et al., 2002b; Gombosi et al., 2003; Raeder et al., 1997; Ashour-Abdalla et al., 1997]. The preference is clearly for simulations that run faster than real time on available computer hardware, leading to limitations ...
Interstellar neutral oxygen in a two-shock
... species inside the heliosphere. Not only the neutrals themselves but also the two types of derivatives of the neutrals, the pickup ions and the anomalous component of cosmic rays (ACR), can be used to constrain the perturbations at the interface. As a matter of fact, according to the now well establ ...
... species inside the heliosphere. Not only the neutrals themselves but also the two types of derivatives of the neutrals, the pickup ions and the anomalous component of cosmic rays (ACR), can be used to constrain the perturbations at the interface. As a matter of fact, according to the now well establ ...
Fusor
A fusor is a device that uses an electric field to heat ions to conditions suitable for nuclear fusion. The machine has a voltage between two metal cages inside a vacuum. Positive ions fall down this voltage drop, building up speed. If they collide in the center, they can fuse. This is a type of Inertial electrostatic confinement device.A Farnsworth–Hirsch fusor is the most common type of fusor. This design came from work by Philo T. Farnsworth (in 1964) and Robert L. Hirsch in 1967. A variant of fusor had been proposed previously by William Elmore, James L. Tuck, and Ken Watson at the Los Alamos National Laboratory though they never built the machine.Fusors have been built by various institutions. These include academic institutions such as the University of Wisconsin–Madison, the Massachusetts Institute of Technology and government entities, such as the Atomic Energy Organization of Iran and the Turkish Atomic Energy Authority. Fusors have also been developed commercially, as sources for neutrons by DaimlerChrysler Aerospace and as a method for generating medical isotopes. Fusors have also become very popular for hobbyists and amateurs. A growing number of amateurs have performed nuclear fusion using simple fusor machines.