Life Cycle of a Star
... The Universe is believed to have been formed from a very dense fireball _____________ of years ago. As the fireball expanded and cooled stars and galaxies formed. The fireball explosion is often called the ___ ________. The explosion threw all the material outwards; that is why scientists believe th ...
... The Universe is believed to have been formed from a very dense fireball _____________ of years ago. As the fireball expanded and cooled stars and galaxies formed. The fireball explosion is often called the ___ ________. The explosion threw all the material outwards; that is why scientists believe th ...
The Lives of Stars
... affecting the fusion temperature and rate in the core. 2) the changing temperature and surface area of the outer layers affecting the fusion temperature and rate in the core. 3) the changing fusion temperature and rate in the core affecting the chemical composition of the outer layers 4) The changin ...
... affecting the fusion temperature and rate in the core. 2) the changing temperature and surface area of the outer layers affecting the fusion temperature and rate in the core. 3) the changing fusion temperature and rate in the core affecting the chemical composition of the outer layers 4) The changin ...
Solutions to Homework #4, AST 203, Spring 2009
... for inappropriately high precision (which usually means more than 2 significant figures in this homework). No more than two points off per problem for overly high precision. Three points off for each arithmetic or algebra error (although if the part of the problem in which this arithmetic error is m ...
... for inappropriately high precision (which usually means more than 2 significant figures in this homework). No more than two points off per problem for overly high precision. Three points off for each arithmetic or algebra error (although if the part of the problem in which this arithmetic error is m ...
GRB Progenitors and their environments
... • Collapsar Models: Can be produced in single and binary stars. Single star models require high rotation with minimal angular momentum loss in winds (perhaps rotationally-induced mixing can help?). Binary systems are used to i) remove the hydrogen envelope without losing angular momentum, ii) spinni ...
... • Collapsar Models: Can be produced in single and binary stars. Single star models require high rotation with minimal angular momentum loss in winds (perhaps rotationally-induced mixing can help?). Binary systems are used to i) remove the hydrogen envelope without losing angular momentum, ii) spinni ...
(Star Stuff) ( 11-9-10)
... Stars like our Sun become Red Giants after they leave the M.S. and eventually White Dwarfs ...
... Stars like our Sun become Red Giants after they leave the M.S. and eventually White Dwarfs ...
Origin_of_Elements in the stars
... The story shifts from the dying core to the star's distended outer layers. The core, their underlying foundation, now has all but imploded. The outer layers of the Sun fall inward toward the core. But the base material ignites on the way in, causing the outer surfaces to bounce and vibrate. Eventual ...
... The story shifts from the dying core to the star's distended outer layers. The core, their underlying foundation, now has all but imploded. The outer layers of the Sun fall inward toward the core. But the base material ignites on the way in, causing the outer surfaces to bounce and vibrate. Eventual ...
black hole
... Gamma Ray Bursts • A long burst is probably caused by the explosion of a very massive star in a hypernova • But the short bursts are still a bit of a mystery. We think that they may be powered by merging neutron stars. • When two neutron stars merge, they create a black hole which starts eating the ...
... Gamma Ray Bursts • A long burst is probably caused by the explosion of a very massive star in a hypernova • But the short bursts are still a bit of a mystery. We think that they may be powered by merging neutron stars. • When two neutron stars merge, they create a black hole which starts eating the ...
Fate of Stars
... unbound “free” electrons for every Fe • Electrons are “degenerate” as so close together. This causes them to provide most of the pressure resisting gravity • Enormous stress. If electrons “give way” leaves “hole” in center of star PHYS 162 ...
... unbound “free” electrons for every Fe • Electrons are “degenerate” as so close together. This causes them to provide most of the pressure resisting gravity • Enormous stress. If electrons “give way” leaves “hole” in center of star PHYS 162 ...
Stars Study Guide KEY
... 2. How is the mass of a star related to how long the star will live? How long the star lasts depends upon how massive it is. The more mass a star has, the faster it burns out. High mass stars die faster; low mass stars live longer lives. 3. Describe the life cycle of a low/medium mass star. (Tell th ...
... 2. How is the mass of a star related to how long the star will live? How long the star lasts depends upon how massive it is. The more mass a star has, the faster it burns out. High mass stars die faster; low mass stars live longer lives. 3. Describe the life cycle of a low/medium mass star. (Tell th ...
Chapter 16 Nuclear Chemistry - An Introduction to Chemistry
... 20. One of the ways that heavy nuclides change to move back into the band of stability is to release two protons and two neutrons in the form of a helium nucleus, called an alpha particle. 22. When a radioactive nuclide has a neutron to proton ratio that is too low, it can move toward stability in o ...
... 20. One of the ways that heavy nuclides change to move back into the band of stability is to release two protons and two neutrons in the form of a helium nucleus, called an alpha particle. 22. When a radioactive nuclide has a neutron to proton ratio that is too low, it can move toward stability in o ...
Life Stages of High
... Role of Mass • A star’s mass determines its entire life story because it determines its core temperature. • High-mass stars have short lives, eventually becoming hot enough to make iron, and end in supernova explosions. • Low-mass stars have long lives, never become hot enough to fuse carbon nuclei ...
... Role of Mass • A star’s mass determines its entire life story because it determines its core temperature. • High-mass stars have short lives, eventually becoming hot enough to make iron, and end in supernova explosions. • Low-mass stars have long lives, never become hot enough to fuse carbon nuclei ...
neutron star.
... The White Dwarf Limit • Quantum mechanics says that electrons must move faster as they are squeezed into a very small space. • As a white dwarf’s mass approaches 1.4MSun, its electrons must move at nearly the speed of light. • Because nothing can move faster than light, a white dwarf cannot be more ...
... The White Dwarf Limit • Quantum mechanics says that electrons must move faster as they are squeezed into a very small space. • As a white dwarf’s mass approaches 1.4MSun, its electrons must move at nearly the speed of light. • Because nothing can move faster than light, a white dwarf cannot be more ...
Star Classification - University of Louisville
... Brown Dwarfs: stars that failed to erupt into regular stars. White Dwarfs: small, dense and failing stars that are running out of fuel Black Dwarfs: dead stars that don't glow Yellow Dwarfs: small, main sequence stars (The Sun is one of the smaller stars that will develop into a white dwarf, exhaust ...
... Brown Dwarfs: stars that failed to erupt into regular stars. White Dwarfs: small, dense and failing stars that are running out of fuel Black Dwarfs: dead stars that don't glow Yellow Dwarfs: small, main sequence stars (The Sun is one of the smaller stars that will develop into a white dwarf, exhaust ...
White Dwarfs - Indiana University
... – model suggests DAs should have a wide range of hydrogen layers, from 10-4 solar masses to 10-13 solar masses of hydrogen – Asteroseismology results suggest all DAs have thick hydrogen layers – The model also predicts trace amounts of H in the hottest DB stars (just at the cool edge of the DB gap) ...
... – model suggests DAs should have a wide range of hydrogen layers, from 10-4 solar masses to 10-13 solar masses of hydrogen – Asteroseismology results suggest all DAs have thick hydrogen layers – The model also predicts trace amounts of H in the hottest DB stars (just at the cool edge of the DB gap) ...
ppt
... Weakly Interacting Massive Particles. Generic name for any particle that has a lot of mass, but interacts weakly with normal matter. Must be massive, to give required mass. Must be weakly interacting, in order to have avoided detection (i.e. cannot absorb or emit E/M radiation). ...
... Weakly Interacting Massive Particles. Generic name for any particle that has a lot of mass, but interacts weakly with normal matter. Must be massive, to give required mass. Must be weakly interacting, in order to have avoided detection (i.e. cannot absorb or emit E/M radiation). ...
Introduction This book will teach you all you need to know about the
... another isotope you could say. So for aluminum 28 as it decays it turns into silicon so an easy way to remember what is turning into what is that aluminum is the parent isotope while silicon is the daughter isotope. Another type of dating is radiometric or carbon-14 dating. This dating is created by ...
... another isotope you could say. So for aluminum 28 as it decays it turns into silicon so an easy way to remember what is turning into what is that aluminum is the parent isotope while silicon is the daughter isotope. Another type of dating is radiometric or carbon-14 dating. This dating is created by ...
The Spatially-Resolved Scaling Law of Star Formation
... 8 MSun, and they end up with masses below 1.4 MSun [the Chandrasekar limit]. Most WDs have ...
... 8 MSun, and they end up with masses below 1.4 MSun [the Chandrasekar limit]. Most WDs have ...
Stellar Structure - Astronomy Centre : Research
... that radius is a black hole, detectable only by its (long-range) gravitational field: no light can escape • Black holes have only mass, angular momentum and charge • (Quantum effects do allow Hawking radiation) ...
... that radius is a black hole, detectable only by its (long-range) gravitational field: no light can escape • Black holes have only mass, angular momentum and charge • (Quantum effects do allow Hawking radiation) ...
Death of High Mass Stars
... • After core has a mass greater than 1.4 M (Chandrasekhar limit) the electron degeneracy is not strong enough. • Electrons are forced to combine with the protons to create neutrons. • Core collapses until pressure from physical force of neutrons bouncing against each other stops it. • Core rebounds ...
... • After core has a mass greater than 1.4 M (Chandrasekhar limit) the electron degeneracy is not strong enough. • Electrons are forced to combine with the protons to create neutrons. • Core collapses until pressure from physical force of neutrons bouncing against each other stops it. • Core rebounds ...
Physics 12
... b. How much force is required to make the 34 μC move as indicated above? 6. An alpha particle (4 x mass of a proton and twice its charge) is travelling at 2.4 x 106 m/s when it is 8.0 m away from a 7.6 x 10-5 C positive charge. What is the alpha particle’s distance of closest approach (how close can ...
... b. How much force is required to make the 34 μC move as indicated above? 6. An alpha particle (4 x mass of a proton and twice its charge) is travelling at 2.4 x 106 m/s when it is 8.0 m away from a 7.6 x 10-5 C positive charge. What is the alpha particle’s distance of closest approach (how close can ...
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.