Plasmoid-induced-reconnection and fractal reconnection Kazunari Shibata and Syuniti Tanuma
... In this section, we examine the physical mechanism of the plasmoid-induced-reconnection in more detail. We consider a situation where reconnection has just begun and a plasmoid, with a length L p and a width W p , has just started to form. The reconnection generates a jet (with the Alfvén speed V A ...
... In this section, we examine the physical mechanism of the plasmoid-induced-reconnection in more detail. We consider a situation where reconnection has just begun and a plasmoid, with a length L p and a width W p , has just started to form. The reconnection generates a jet (with the Alfvén speed V A ...
Chapter 21 A Family of Planets
... 7HY 'ROUP THE )NNER 0LANETS 4OGETHER 4HE INNER SOLAR SYSTEM INCLUDES THE ONLY PLANET KNOWN TO SUPPORT LIFE %ARTH AND THREE OTHER PLANETS 4HESE FOUR INNER PLANETS ARE CALLED TERRESTRIAL PLANETS BECAUSE THEY ALL HAVE A CHEMICAL MAKEUP SIMILAR TO THAT OF %ARTH 4HE TERRESTRIAL PLANETS ARE MUCH ...
... 7HY 'ROUP THE )NNER 0LANETS 4OGETHER 4HE INNER SOLAR SYSTEM INCLUDES THE ONLY PLANET KNOWN TO SUPPORT LIFE %ARTH AND THREE OTHER PLANETS 4HESE FOUR INNER PLANETS ARE CALLED TERRESTRIAL PLANETS BECAUSE THEY ALL HAVE A CHEMICAL MAKEUP SIMILAR TO THAT OF %ARTH 4HE TERRESTRIAL PLANETS ARE MUCH ...
Numerical simulations of wind–equatorial gas
... for tens of years. It is impossible to know the exact mass-loss history and mass-loss rate that led to the formation of the WBE. Considering that our goals are (a) to show that the interaction of the primary wind with the WBE cannot be neglected, and (b) to show that this interaction can in principl ...
... for tens of years. It is impossible to know the exact mass-loss history and mass-loss rate that led to the formation of the WBE. Considering that our goals are (a) to show that the interaction of the primary wind with the WBE cannot be neglected, and (b) to show that this interaction can in principl ...
Professor Comet: March, 2017
... current orbits are influenced by the strong gravitational field of Jupiter which can adjust all or most of the orbital parameters of these bodies are their farthest positions of influence from the Sun’s gravity. It is likely that all of these objects where broken off from the larger icy – rock bodie ...
... current orbits are influenced by the strong gravitational field of Jupiter which can adjust all or most of the orbital parameters of these bodies are their farthest positions of influence from the Sun’s gravity. It is likely that all of these objects where broken off from the larger icy – rock bodie ...
dynamical history of the asteroid belt and implications for terrestrial
... I am thankful for all the people in my life who have helped, guided, and encouraged me throughout the years. First I thank my graduate advisor, Renu Malhotra. I owe much to her sage advice and wisdom over the years that I’ve worked with her. I thank Bob Strom for his spirit and continued dedication ...
... I am thankful for all the people in my life who have helped, guided, and encouraged me throughout the years. First I thank my graduate advisor, Renu Malhotra. I owe much to her sage advice and wisdom over the years that I’ve worked with her. I thank Bob Strom for his spirit and continued dedication ...
Leaky Stars: Pulsations, Waves, and Turbulence in Stellar Winds
... Diagram • The Sun: coronal heating & fast solar wind • Hot stars (O, B, W-R): pulsations & radiation-driving • Cool stars (T Tau, Mira): chromospheric flows? Steven R. Cranmer & many others ...
... Diagram • The Sun: coronal heating & fast solar wind • Hot stars (O, B, W-R): pulsations & radiation-driving • Cool stars (T Tau, Mira): chromospheric flows? Steven R. Cranmer & many others ...
Etymology - Link Observatory
... The streams of dust and gas each form their own distinct tail, pointing in slightly different directions. The tail of dust is left behind in the comet's orbit in such a manner that it often forms a curved tail called the type II or dust tail. At the same time, the ion or type I tail, made of gases, ...
... The streams of dust and gas each form their own distinct tail, pointing in slightly different directions. The tail of dust is left behind in the comet's orbit in such a manner that it often forms a curved tail called the type II or dust tail. At the same time, the ion or type I tail, made of gases, ...
Simulating the outer layers of Procyon A: a comparison with the Sun
... part of the SAL is in an optically thin region, the photons can more readily carry away excess internal energy from the temperature fluctuations, than they can in optically thick regions. As it loses its excess internal energy at a greater rate compared with its surroundings, the fluctuation is said ...
... part of the SAL is in an optically thin region, the photons can more readily carry away excess internal energy from the temperature fluctuations, than they can in optically thick regions. As it loses its excess internal energy at a greater rate compared with its surroundings, the fluctuation is said ...
Presentation in PDF format.
... What could have led to these ideas? Seneca (c.4 BC – 65 AD) gives some insight. Referring to the ‘difference’ between us Romans and Etruscans, he remarks, “. . . We believe that lightning is caused by clouds colliding, whereas they believe that clouds collide in order to create lightning. Since they ...
... What could have led to these ideas? Seneca (c.4 BC – 65 AD) gives some insight. Referring to the ‘difference’ between us Romans and Etruscans, he remarks, “. . . We believe that lightning is caused by clouds colliding, whereas they believe that clouds collide in order to create lightning. Since they ...
Stonehenge: An Introduction to the concept of the Heaven`s Hinge
... Today, a discovery mission is in progress to send the rover, ‘Curiosity’, to the planet Mars. Similarly, our ancestors must have considered the whimsies of the Sun and Moon worthy of curiosity: These objects seem to move within the heavenly firmament, yet are seemingly not committed to a fixed posit ...
... Today, a discovery mission is in progress to send the rover, ‘Curiosity’, to the planet Mars. Similarly, our ancestors must have considered the whimsies of the Sun and Moon worthy of curiosity: These objects seem to move within the heavenly firmament, yet are seemingly not committed to a fixed posit ...
Estimation of picked-up lunar ions for future compositional remote SIMS
... spacecraft such as Apollo in the early days of space exploration, few clear detections of Moon-originating atoms and ions were obtained because the instruments were constrained by contamination and outgassing around them (e.g., Hodges et al., 1972; Hodges, 1975). The UV spectrometer on board Apollo ...
... spacecraft such as Apollo in the early days of space exploration, few clear detections of Moon-originating atoms and ions were obtained because the instruments were constrained by contamination and outgassing around them (e.g., Hodges et al., 1972; Hodges, 1975). The UV spectrometer on board Apollo ...
The Plasma Physics Processes that Drive Ring Current
... of the universe by volume (>99.9%) is comprised of plasma, which is an electrically neutral, highly ionized gas composed of roughly equal numbers of ions and electrons. As humans venture away from the neutral surface of the Earth, we are immersed in a highly dynamic and complex environment filled wi ...
... of the universe by volume (>99.9%) is comprised of plasma, which is an electrically neutral, highly ionized gas composed of roughly equal numbers of ions and electrons. As humans venture away from the neutral surface of the Earth, we are immersed in a highly dynamic and complex environment filled wi ...
Venus express: Highlights of the nominal mission - HAL
... The Venus Express spacecraft design is based on the successful Mars Express bus—a 600 kg 3-axis stabilized platform with two body-fixed telecommunication antennas (Fig. 1). The spacecraft is described in detail by Svedhem et al. (2007a, 2008). Most of the subsystems and payloads are mounted on its w ...
... The Venus Express spacecraft design is based on the successful Mars Express bus—a 600 kg 3-axis stabilized platform with two body-fixed telecommunication antennas (Fig. 1). The spacecraft is described in detail by Svedhem et al. (2007a, 2008). Most of the subsystems and payloads are mounted on its w ...
PPT
... • Originally thought to be a dirty ice ball – Observations of Tempel 1 show surprisingly small amounts of water ice (in blue in the picture) • Icy dirt ball? PTYS/ASTR 206 ...
... • Originally thought to be a dirty ice ball – Observations of Tempel 1 show surprisingly small amounts of water ice (in blue in the picture) • Icy dirt ball? PTYS/ASTR 206 ...
YEAR - University of Maryland Astronomy
... The Dynamic Moon: What we've Learned from the Apollo Missions Clouds of Gas Between the Stars Sunspots on the Rise The Dusty Origins of Stars Astronomy's Practical Side: Where on Earth am I? Observing Planetary Nebulae with HST Discovery of Anti-Particles at the Center of our Milky Way Galaxy Hubble ...
... The Dynamic Moon: What we've Learned from the Apollo Missions Clouds of Gas Between the Stars Sunspots on the Rise The Dusty Origins of Stars Astronomy's Practical Side: Where on Earth am I? Observing Planetary Nebulae with HST Discovery of Anti-Particles at the Center of our Milky Way Galaxy Hubble ...
Simulating the outer layers of Procyon A: a comparison with the Sun
... (hereafter SAL) between the atmosphere and deep convection. It is in the SAL region that the p-modes are believed to be excited by stochastic processes. In the next section, we describe briefly the starting model and the procedure followed in carrying out the 3D numerical simulation. Section 3 discu ...
... (hereafter SAL) between the atmosphere and deep convection. It is in the SAL region that the p-modes are believed to be excited by stochastic processes. In the next section, we describe briefly the starting model and the procedure followed in carrying out the 3D numerical simulation. Section 3 discu ...
Comet Facts, Myths, and Legends
... Comet Swift-Tuttle 1982 This comet was first seen in July 1862 by American astronomers Lewis Swift and Horace Tuttle. As Comet Swift-Tuttle moves closer to the Sun every 120 years, it leaves behind a trail of dust debris that provides the ingredients for a spectacular fireworks display seen in July ...
... Comet Swift-Tuttle 1982 This comet was first seen in July 1862 by American astronomers Lewis Swift and Horace Tuttle. As Comet Swift-Tuttle moves closer to the Sun every 120 years, it leaves behind a trail of dust debris that provides the ingredients for a spectacular fireworks display seen in July ...
Neptune and Triton_ Essential pieces of the Solar System puzzle
... Jupiter, Saturn, and Uranus, and additionally forms a subgroup with Uranus called the “ice giants”, because both planets are primarily composed of “ices” (volatile elements heavier than hydrogen and helium). However, there are fundamental and important differences between the Uranus and Neptune plan ...
... Jupiter, Saturn, and Uranus, and additionally forms a subgroup with Uranus called the “ice giants”, because both planets are primarily composed of “ices” (volatile elements heavier than hydrogen and helium). However, there are fundamental and important differences between the Uranus and Neptune plan ...
Chaos in the Solar System
... so far, chaotic orbits result from overlapping resonances. Perhaps the clearest examples are found in the asteroid belt. Overlapping resonances account for its Kirkwood gaps and were used to predict and find evidence for very narrow gaps in the outer belt. Further afield, about one new “short-period ...
... so far, chaotic orbits result from overlapping resonances. Perhaps the clearest examples are found in the asteroid belt. Overlapping resonances account for its Kirkwood gaps and were used to predict and find evidence for very narrow gaps in the outer belt. Further afield, about one new “short-period ...
Multi-dimensional models of circumstellar shells around evolved
... Hertzsprung-Russell diagram to become a WR star (e.g. Langer et al. 1994). This transition causes a radical change in the wind parameters (Lamers & Cassinelli 1999, and references therein). During the giant phase, the wind is relatively slow (10−200 km s−1 ), due to the low escape velocity. The WR s ...
... Hertzsprung-Russell diagram to become a WR star (e.g. Langer et al. 1994). This transition causes a radical change in the wind parameters (Lamers & Cassinelli 1999, and references therein). During the giant phase, the wind is relatively slow (10−200 km s−1 ), due to the low escape velocity. The WR s ...
Pulsed high-energy γ-rays from thermal populations in the current
... The idea that high-energy pulsations might come from current sheets near or outside the light cylinder is not new. Lyubarskii (1996) predicted that particles accelerated through reconnection close to the light cylinder might emit gamma-rays through the synchrotron process. Lyubarskii’s emission site ...
... The idea that high-energy pulsations might come from current sheets near or outside the light cylinder is not new. Lyubarskii (1996) predicted that particles accelerated through reconnection close to the light cylinder might emit gamma-rays through the synchrotron process. Lyubarskii’s emission site ...
Master`s Thesis
... observations provided by GBM and BAT instruments on board Fermi[7] and Swift[18] satellites respectively. Moreover, the performance on stellar flares detection of an optimal detection algorithm called SISTED (Sunlit Ionosphere Sudden TEC Enhancement Detector[8]), which shares the same physical funda ...
... observations provided by GBM and BAT instruments on board Fermi[7] and Swift[18] satellites respectively. Moreover, the performance on stellar flares detection of an optimal detection algorithm called SISTED (Sunlit Ionosphere Sudden TEC Enhancement Detector[8]), which shares the same physical funda ...
shock structures and momentum transfer in herbig
... fields also influence the physics at the shock by redirecting the highestenergy ions back into the preshock gas. This process is thought to generate cosmic rays, and it may produce a precursor that heats the preshock gas, but this effect has not been explored in any detail for HH objects. Finally, s ...
... fields also influence the physics at the shock by redirecting the highestenergy ions back into the preshock gas. This process is thought to generate cosmic rays, and it may produce a precursor that heats the preshock gas, but this effect has not been explored in any detail for HH objects. Finally, s ...
master thesis
... consists of a series of parallel electrodes equally spaced and connected to an alternating current source that generates an electromagnetic wave, in movement, thus repelling the particles. The goal of this project is to determine the best configuration of the EDS so as to maximize the performance of ...
... consists of a series of parallel electrodes equally spaced and connected to an alternating current source that generates an electromagnetic wave, in movement, thus repelling the particles. The goal of this project is to determine the best configuration of the EDS so as to maximize the performance of ...
Construction and Operation of an Axion Helioscope
... trapped in the SN core has been estimated by Turner (1988). The uncertainty in this range is rather severe, perhaps as much as an order of magnitude on either end of the window. This means that the actually excluded regime may be much smaller than stated in Eq. (9). Also, however, the regime where a ...
... trapped in the SN core has been estimated by Turner (1988). The uncertainty in this range is rather severe, perhaps as much as an order of magnitude on either end of the window. This means that the actually excluded regime may be much smaller than stated in Eq. (9). Also, however, the regime where a ...
Heliosphere
The heliosphere is the bubble-like region of space dominated by the Sun, which extends far beyond the orbit of Pluto. Plasma ""blown"" out from the Sun, known as the solar wind, creates and maintains this bubble against the outside pressure of the interstellar medium, the hydrogen and helium gas that permeates the Milky Way Galaxy. The solar wind flows outward from the Sun until encountering the termination shock, where motion slows abruptly. The Voyager spacecraft have actively explored the outer reaches of the heliosphere, passing through the shock and entering the heliosheath, a transitional region which is in turn bounded by the outermost edge of the heliosphere, called the heliopause. The overall shape of the heliosphere is controlled by the interstellar medium, through which it is traveling, as well as the Sun, and does not appear to be perfectly spherical. The limited data available and unexplored nature of these structures have resulted in many theories.On September 12, 2013, NASA announced that Voyager 1 had exited the heliosphere on August 25, 2012, when it measured a sudden increase in plasma density of about forty times. Because the heliopause marks one boundary between the Sun's solar wind and the rest of the galaxy, a spacecraft such as Voyager 1 which has departed the heliosphere can be said to have reached interstellar space.