11. Dead Stars
... The core collapses by roughly a factor of 1000, so it spins about 10002 = 106 times more often. Final rotation period is a few hundredth’s of a second! ...
... The core collapses by roughly a factor of 1000, so it spins about 10002 = 106 times more often. Final rotation period is a few hundredth’s of a second! ...
Star-Gas-Star Cycle Powerpoint
... neutrons travelling at the speed of light. They can penetrate the Earth’s atmosphere and reach the surface. You are struck by about one per second, on the average. While flying in an airplane, you are struck by more. Cosmic rays tend to channel along the magnetic field lines at the North and South P ...
... neutrons travelling at the speed of light. They can penetrate the Earth’s atmosphere and reach the surface. You are struck by about one per second, on the average. While flying in an airplane, you are struck by more. Cosmic rays tend to channel along the magnetic field lines at the North and South P ...
black hole
... This figure illustrates the lighthouse effect responsible. Strong jets of matter are emitted at the magnetic poles, as that is where they can escape. If the rotation axis is not the same as the magnetic axis, the two beams will ...
... This figure illustrates the lighthouse effect responsible. Strong jets of matter are emitted at the magnetic poles, as that is where they can escape. If the rotation axis is not the same as the magnetic axis, the two beams will ...
PowerPoint Presentation - Brighter Than a Trillion Suns
... out as a very relativistic jet (~100) • This makes it look even brighter if jet points at us, but still involves great powers, since many are very distant ...
... out as a very relativistic jet (~100) • This makes it look even brighter if jet points at us, but still involves great powers, since many are very distant ...
Supercritical clouds
... • No way of initiating collapse if supporting magnetic flux is frozen-in. • Solution: only (molecular) ions are tied to field lines. • Ambipolar diffusion: field lines can slip through the neutrals, allowing supercritical cores to form. • Long diffusion timescale means inefficient star formation. ...
... • No way of initiating collapse if supporting magnetic flux is frozen-in. • Solution: only (molecular) ions are tied to field lines. • Ambipolar diffusion: field lines can slip through the neutrals, allowing supercritical cores to form. • Long diffusion timescale means inefficient star formation. ...
SPC Teachers Problems - University of Oxford
... preparation I obtain quite distinct values. The relative difference, amounting to about 1/1000 part, is small in itself, but it lies entirely outside the errors of experiment, and can only be attributed to a variation in the character of the gas. In the first method the oxygen of atmospheric air is ...
... preparation I obtain quite distinct values. The relative difference, amounting to about 1/1000 part, is small in itself, but it lies entirely outside the errors of experiment, and can only be attributed to a variation in the character of the gas. In the first method the oxygen of atmospheric air is ...
Problem set #2: AY 254C (Spring 2014) Due March 3, 2014
... temperatures and densities at which the heating due to nuclear burning outpaces the rate at which the heat can be radiated away; the result is then a runaway thermonuclear explosion that appears to us as a Type-I x-ray burst. The purpose of this problem is to work through some of the relevant physic ...
... temperatures and densities at which the heating due to nuclear burning outpaces the rate at which the heat can be radiated away; the result is then a runaway thermonuclear explosion that appears to us as a Type-I x-ray burst. The purpose of this problem is to work through some of the relevant physic ...
Ω spin axis R
... 1. A classical model for the hydrogen atom consists of an electron in a planar orbit around a fixed proton. By calculating the total radiated power, show that this classical model is unstable. More specifically, using a dipole approximation, calculate the fractional loss of energy per cycle, and thu ...
... 1. A classical model for the hydrogen atom consists of an electron in a planar orbit around a fixed proton. By calculating the total radiated power, show that this classical model is unstable. More specifically, using a dipole approximation, calculate the fractional loss of energy per cycle, and thu ...
Spring Physics of Astronomy– Quiz on Ch
... The X rays arrive after about 8 minutes, while the CME material arrives after a few days. The disturbances upon the Earth from these outbursts occur almost simultaneously, about 8 minutes after the flare because the CME material travels almost at the speed of light. ...
... The X rays arrive after about 8 minutes, while the CME material arrives after a few days. The disturbances upon the Earth from these outbursts occur almost simultaneously, about 8 minutes after the flare because the CME material travels almost at the speed of light. ...
Life of a star
... opposed by a pressure which no longer depends on gas temperature, but on its density. In astrophysics bodies of this kind are called compact objects and the matter of which they are made of is called degenerate matter. In order to explain this behaviour we must go from the extremely huge field to th ...
... opposed by a pressure which no longer depends on gas temperature, but on its density. In astrophysics bodies of this kind are called compact objects and the matter of which they are made of is called degenerate matter. In order to explain this behaviour we must go from the extremely huge field to th ...
Chapter20
... the class. A couple of important points can be made using the model. First, careful timing, which the class can help with, shows that the air table is slowing its rotation, increasing the period of time between pulses. This is due to energy losses just as for a real pulsar. Second, if the classroom ...
... the class. A couple of important points can be made using the model. First, careful timing, which the class can help with, shows that the air table is slowing its rotation, increasing the period of time between pulses. This is due to energy losses just as for a real pulsar. Second, if the classroom ...
IMSC 10
... The sun is a source of energy for all life on Earth. Mercury looks like our moon and has an atmosphere. Planet Venus has a thick toxic atmosphere. Earth completes one revolution around the sun in 365 days. Mars has volcanoes at each of its poles. Jupiter is one of the smallest planets in our solar s ...
... The sun is a source of energy for all life on Earth. Mercury looks like our moon and has an atmosphere. Planet Venus has a thick toxic atmosphere. Earth completes one revolution around the sun in 365 days. Mars has volcanoes at each of its poles. Jupiter is one of the smallest planets in our solar s ...
Cosmic Objects – Cosmology – Study Guide
... 3. Comet rock and ice on high elliptical orbit around Sun; forms a tail when close to Sun 4. Asteroid rock and metal orbiting the Sun 5. Oort Cloud spheroidal cloud of ice and rock surrounding the solar system, > 100 AU Phenomena 1. Gamma Ray Burst most powerful explosion in the universe 2. Black Ho ...
... 3. Comet rock and ice on high elliptical orbit around Sun; forms a tail when close to Sun 4. Asteroid rock and metal orbiting the Sun 5. Oort Cloud spheroidal cloud of ice and rock surrounding the solar system, > 100 AU Phenomena 1. Gamma Ray Burst most powerful explosion in the universe 2. Black Ho ...
Physics and Star Wars
The space opera interstellar epic Star Wars uses science and technology in its settings and storylines, although its main focus is not necessarily on science. The series has showcased many technological concepts, both in the movies and in the Expanded Universe of novels and comics. The Star Wars movies primary aim is to deliver drama, philosophy, political science and less on scientific knowledge. Many of the on-screen technologies created or borrowed for the Star Wars universe were used mainly as plot devices or as aesthetic elements, and not as elements of the story in their own right.The iconic status that Star Wars has gained in popular culture allows it to be used as an accessible introduction to real scientific concepts. Many of the features or technologies used in the Star Wars universe are not yet considered possible. However their concepts are still probable.