Hydrodynamic simulations of pulsar glitch recovery
... The dynamics of individual vortices is highly complex and has been studied extensively for terrestrial superfluids such as 4 He and Bose-Einstein condensates (Donnelly 1991; Fetter 2009). Such systems can be modelled microscopically using the Gross-Pitaevskii equation (GPE). While the GPE approach i ...
... The dynamics of individual vortices is highly complex and has been studied extensively for terrestrial superfluids such as 4 He and Bose-Einstein condensates (Donnelly 1991; Fetter 2009). Such systems can be modelled microscopically using the Gross-Pitaevskii equation (GPE). While the GPE approach i ...
Gaseous Planets, Protostars And Young Brown Dwarfs
... fall from the Roche lobe to the planet radius, producing a shock luminosity; (iii) once the planet reaches its predefined final mass, the accretion rate is set to 0 and the boundary conditions become the ones of a cooling isolated object, and , where denotes the mean Ros ...
... fall from the Roche lobe to the planet radius, producing a shock luminosity; (iii) once the planet reaches its predefined final mass, the accretion rate is set to 0 and the boundary conditions become the ones of a cooling isolated object, and , where denotes the mean Ros ...
Presolar History Recorded in Extraterrestrial Materials
... companion star is accreted onto the surface of a white In 1987, Lewis and coworkers made a remarkable discovery dwarf star, causing an onslaught of nuclear reactions and that would revolutionize the study of stars and of our own explosion of the accreted layer. Solar System: they identified bona fid ...
... companion star is accreted onto the surface of a white In 1987, Lewis and coworkers made a remarkable discovery dwarf star, causing an onslaught of nuclear reactions and that would revolutionize the study of stars and of our own explosion of the accreted layer. Solar System: they identified bona fid ...
Exam 1
... ____ 24. Which of the following best describes the purpose of resistors? a. turn a circuit on or off. c. store electrical energy. b. act as a timing device within a circuit. d. slow the flow of electricity. ____ 25. The answer to this question is “B.” Bubble “B” on your scantron. a. b. ...
... ____ 24. Which of the following best describes the purpose of resistors? a. turn a circuit on or off. c. store electrical energy. b. act as a timing device within a circuit. d. slow the flow of electricity. ____ 25. The answer to this question is “B.” Bubble “B” on your scantron. a. b. ...
Determination of the position angle of stellar spin axes
... As an intrinsic 1D stellar spectrum, we took a synthetic phoenix spectrum (Hauschildt & Baron (2005)) calculated for a cool giant like Aldebaran using the following parameters: an effective temperature of 4 000K, a surface gravity log(g) = 1.8, and solarlike metallicity. It was calculated under the ...
... As an intrinsic 1D stellar spectrum, we took a synthetic phoenix spectrum (Hauschildt & Baron (2005)) calculated for a cool giant like Aldebaran using the following parameters: an effective temperature of 4 000K, a surface gravity log(g) = 1.8, and solarlike metallicity. It was calculated under the ...
Interstellar neutral oxygen in a two-shock
... oxygen particles could be measured in the far UV at the 1304A primary resonance line (Bowyer & Fahr, 1989; Fahr, 1989; Fahr et. al. 1995 and references therein). However, this interest in minor species is now growing due to the recent successfull detections of pick- up (Geiss et al, 1994) and ACR (C ...
... oxygen particles could be measured in the far UV at the 1304A primary resonance line (Bowyer & Fahr, 1989; Fahr, 1989; Fahr et. al. 1995 and references therein). However, this interest in minor species is now growing due to the recent successfull detections of pick- up (Geiss et al, 1994) and ACR (C ...
Polarimetric evidence of a white dwarf pulsar in
... dwarf spin and the beat periods, are also consistent with this emission being produced in the white dwarf magnetosphere, which is additionally modulated at the binary period. The spectral energy distribution (SED) in AR Sco (2, 21) shows a Sν ∝ ν α1 (α1 ∼ 1.3) self-absorbed power law spectral distri ...
... dwarf spin and the beat periods, are also consistent with this emission being produced in the white dwarf magnetosphere, which is additionally modulated at the binary period. The spectral energy distribution (SED) in AR Sco (2, 21) shows a Sν ∝ ν α1 (α1 ∼ 1.3) self-absorbed power law spectral distri ...
Interacting supernovae from photoionization
... This has important implications for supernova/circumstellar-medium interactions because ejected material from about 10% of all core-collapse supernovae is observed to collide with dense circumstellar matter in the immediate vicinity of the exploding star7. It is usually assumed that this dense matte ...
... This has important implications for supernova/circumstellar-medium interactions because ejected material from about 10% of all core-collapse supernovae is observed to collide with dense circumstellar matter in the immediate vicinity of the exploding star7. It is usually assumed that this dense matte ...
Chapter 2 - UCLA.edu
... where h is Plank's constant. In other words, the resonant frequency of a spin is simply its Larmor frequency. Modem high-resolution NMR spectrometers currently employ field strengths up to 18.8 T (tesla) which, for protons, correspond to resonant frequencies up to 800 MHz, which fall within the radi ...
... where h is Plank's constant. In other words, the resonant frequency of a spin is simply its Larmor frequency. Modem high-resolution NMR spectrometers currently employ field strengths up to 18.8 T (tesla) which, for protons, correspond to resonant frequencies up to 800 MHz, which fall within the radi ...
Chapter 15--Our Sun - Geological Sciences
... equilibrium with energy generated by nuclear fusion, the energy-generation mechanism of gravitational contraction was important in the distant past and will be important again in the distant future. Our Sun was born from a collapsing cloud of interstellar gas. The contraction of the cloud released g ...
... equilibrium with energy generated by nuclear fusion, the energy-generation mechanism of gravitational contraction was important in the distant past and will be important again in the distant future. Our Sun was born from a collapsing cloud of interstellar gas. The contraction of the cloud released g ...
HEPAP Subpanel
... • Cosmic rays create background events that mask the critical events being searched for. – It takes two miles of rock to absorb the most energetic of the muons created by cosmic ray protons striking the earth's atmosphere – At such great depths, the only backgrounds are made by neutrinos (which easi ...
... • Cosmic rays create background events that mask the critical events being searched for. – It takes two miles of rock to absorb the most energetic of the muons created by cosmic ray protons striking the earth's atmosphere – At such great depths, the only backgrounds are made by neutrinos (which easi ...
Lecture 12: Accretion
... There are several ways that accretion can occur in binary systems: If one star is filling its Roche lobe, then matter can stream through the L1 point and be captured by the companion: Roche-lobe overflow Even if the stars are not close enough for Roche-lobe overflow to occur, mass from a strong stel ...
... There are several ways that accretion can occur in binary systems: If one star is filling its Roche lobe, then matter can stream through the L1 point and be captured by the companion: Roche-lobe overflow Even if the stars are not close enough for Roche-lobe overflow to occur, mass from a strong stel ...
In Pursuit of the Least Luminous Galaxies
... as uniform as possible to the faintest limits. For example– Well defined: to compare observations of the MW dwarf population with models requires a detailed, quantitative description of the current census. Quantitative assessments of the detectability of MW dwarfs in recent survey data, plus an assu ...
... as uniform as possible to the faintest limits. For example– Well defined: to compare observations of the MW dwarf population with models requires a detailed, quantitative description of the current census. Quantitative assessments of the detectability of MW dwarfs in recent survey data, plus an assu ...
Pre-main sequence evolution
... • qualitatively, a steep temperature gradient evolves when nuclear reactions start in solar-type stars ⇒ in low-mass stars, a steep dT/dR does not develop, and the radiative core defining the Henyey track cannot form ⇒ the core remains convective at all times! ...
... • qualitatively, a steep temperature gradient evolves when nuclear reactions start in solar-type stars ⇒ in low-mass stars, a steep dT/dR does not develop, and the radiative core defining the Henyey track cannot form ⇒ the core remains convective at all times! ...
Galactic Evolution of Silicon Isotopes: Applications to
... We calculate and discuss the chemical evolution of the isotopic silicon abundances in the interstellar medium (ISM) at distances and times appropriate to the birth of the solar system. This has several objectives, some of which are related to anomalous silicon isotope ratios within presolar grains e ...
... We calculate and discuss the chemical evolution of the isotopic silicon abundances in the interstellar medium (ISM) at distances and times appropriate to the birth of the solar system. This has several objectives, some of which are related to anomalous silicon isotope ratios within presolar grains e ...
Looking for Magnetic Monopoles AT The Large Hadron Collider
... o not allow for a full detection of photons. Therefore in orderbackground to obtain Eγ 1 TeV. timation of the observable cross section we take region the right-angle crossHence the required selec ltiply it by 4π. This differential cross section is thus the smallest possible. of the photon pairs pro ...
... o not allow for a full detection of photons. Therefore in orderbackground to obtain Eγ 1 TeV. timation of the observable cross section we take region the right-angle crossHence the required selec ltiply it by 4π. This differential cross section is thus the smallest possible. of the photon pairs pro ...
The two components of the evolved massive binary LZ Cephei
... but studies of young open clusters indicate that it can easily reach 60% (e.g. Sana et al. 2008). The effects of binarity on stellar evolution depend not only on the properties of the components, but also on the mass ratio, the separation, and the eccentricity. Consequently, their study is complex, r ...
... but studies of young open clusters indicate that it can easily reach 60% (e.g. Sana et al. 2008). The effects of binarity on stellar evolution depend not only on the properties of the components, but also on the mass ratio, the separation, and the eccentricity. Consequently, their study is complex, r ...
Galactic Evolution of Silicon Isotopes: Application to Presolar SiC
... carbonaceous meteorites, has opened unique views on stellar nucleosynthesis, star-formation processes, local mixing processes in the interstellar medium (henceforth ISM), and chemical evolution (Clayton 1982). The most clearcut cases involve grains possessing such large isotopic anomalies that they ...
... carbonaceous meteorites, has opened unique views on stellar nucleosynthesis, star-formation processes, local mixing processes in the interstellar medium (henceforth ISM), and chemical evolution (Clayton 1982). The most clearcut cases involve grains possessing such large isotopic anomalies that they ...
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.