powerpoint version
... When the core diameter reaches the Schwarzschild radius (9 km for a 3 solar mass remnant) nothing, not even light, can escape. ...
... When the core diameter reaches the Schwarzschild radius (9 km for a 3 solar mass remnant) nothing, not even light, can escape. ...
PowerPoint Presentation - Research in observational
... On to He fusion • Bottleneck: there are no stable elements of mass number 5 or 8, so He + p, or He + He, likely to happen in an H and He-rich environment, end up in products that vanish immediately. • As the Tc rises 8Be, although unstable, can be formed at a rate high enough to result in a non zer ...
... On to He fusion • Bottleneck: there are no stable elements of mass number 5 or 8, so He + p, or He + He, likely to happen in an H and He-rich environment, end up in products that vanish immediately. • As the Tc rises 8Be, although unstable, can be formed at a rate high enough to result in a non zer ...
April 15th
... • Type Ia supernovas make excellent standard candles because they have identical maximum luminosities • Their collapse and explosion occur the same way each time ...
... • Type Ia supernovas make excellent standard candles because they have identical maximum luminosities • Their collapse and explosion occur the same way each time ...
What is a Star? - Lisle CUSD 202
... can also form when binary stars (two stars revolving around each other) get too close and one sucks mass from the other until BOOM! ...
... can also form when binary stars (two stars revolving around each other) get too close and one sucks mass from the other until BOOM! ...
Fusion - School
... demonstrate an understanding that the Sun’s energy is generated by nuclear fusion reactions at its core, converting hydrogen into helium ...
... demonstrate an understanding that the Sun’s energy is generated by nuclear fusion reactions at its core, converting hydrogen into helium ...
122final10
... 6. Draw a picture that illustrates the “astrometric” method of detecting an Extra Solar Planet ...
... 6. Draw a picture that illustrates the “astrometric” method of detecting an Extra Solar Planet ...
Document
... In the study of stellar photospheres one refers generally to Hydrogen, as this is the most abundant element. The quantity nZ=N(Z)/N(H) is directly derived by comparing intensities of the lines of element Z with those of Hydrogen. Another commonly used reference species is Sylicon (Si), which account ...
... In the study of stellar photospheres one refers generally to Hydrogen, as this is the most abundant element. The quantity nZ=N(Z)/N(H) is directly derived by comparing intensities of the lines of element Z with those of Hydrogen. Another commonly used reference species is Sylicon (Si), which account ...
Chapter 28 for Chem
... Elements with Z > 83 are always radioactive. In other words, for Po (Polonium, named by Marie Curie for her native Poland) and higher there are NO naturally occurring stable isotopes. Elements with a HIGH atomic number that are unstable usually have too many neutrons. They decay by α decay, prim ...
... Elements with Z > 83 are always radioactive. In other words, for Po (Polonium, named by Marie Curie for her native Poland) and higher there are NO naturally occurring stable isotopes. Elements with a HIGH atomic number that are unstable usually have too many neutrons. They decay by α decay, prim ...
Energy-Problems-Set4
... dating technique not be applied: a wooden box, a gold statue, and some plant seeds? Explain. 2. Some preserved seed were found and their age, through the technique of carbon dating, was determined to be 5000 years old. However, new evidence suggests that the amount of carbon in the air at that time ...
... dating technique not be applied: a wooden box, a gold statue, and some plant seeds? Explain. 2. Some preserved seed were found and their age, through the technique of carbon dating, was determined to be 5000 years old. However, new evidence suggests that the amount of carbon in the air at that time ...
(convective) core of a star
... NSE is established on the timescale of these reaction rates (the slowest reaction) A system will be in NSE if this timescale is shorter than the timescale for the temperature and density being sufficiently high. ...
... NSE is established on the timescale of these reaction rates (the slowest reaction) A system will be in NSE if this timescale is shorter than the timescale for the temperature and density being sufficiently high. ...
SNC1PL The Life Cycle of Stars
... Small sized stars also convert most of their hydrogen fuel to helium at some point in their life. • Since small stars don’t have as much mass, they do not produce the conditions to reignite nuclear fusion. • The hot core remains and the outer layers simply drift away • When the white dwarf star cool ...
... Small sized stars also convert most of their hydrogen fuel to helium at some point in their life. • Since small stars don’t have as much mass, they do not produce the conditions to reignite nuclear fusion. • The hot core remains and the outer layers simply drift away • When the white dwarf star cool ...
Stars with mass less than 0.5 solar masses
... a bow wave that produce condensation among elements which forms new heavier elements. It’s the only way to produce the heavy elements we can find in nature. That’s why we are called sons of stars. ...
... a bow wave that produce condensation among elements which forms new heavier elements. It’s the only way to produce the heavy elements we can find in nature. That’s why we are called sons of stars. ...
Codes of Life
... forming a protostar. • As more material is packed into the protostar, the centre gets hotter and hotter until a nuclear fusion reaction begins. ...
... forming a protostar. • As more material is packed into the protostar, the centre gets hotter and hotter until a nuclear fusion reaction begins. ...
Nuclear Physics and Radioactivity
... atomic mass number (A) - the number of protons and neutrons in the nucleus of an atom. atomic mass unit - the unit of mass equal to 1/12 the mass of a carbon-12 nucleus; the atomic mass rounded to the nearest whole number is called the mass number. atomic number (Z) - the number of protons in the nu ...
... atomic mass number (A) - the number of protons and neutrons in the nucleus of an atom. atomic mass unit - the unit of mass equal to 1/12 the mass of a carbon-12 nucleus; the atomic mass rounded to the nearest whole number is called the mass number. atomic number (Z) - the number of protons in the nu ...
Mr - White Plains Public Schools
... the brighter. This is not always true though. For example, Polaris is the same temperature as our Sun, but is around 4000X brighter. This difference is due to the mass and size of Polaris. All stars fuse Hydrogen into Helium, when enough Hydrogen collects in a “dust” cloud called a nebula. Nuclear F ...
... the brighter. This is not always true though. For example, Polaris is the same temperature as our Sun, but is around 4000X brighter. This difference is due to the mass and size of Polaris. All stars fuse Hydrogen into Helium, when enough Hydrogen collects in a “dust” cloud called a nebula. Nuclear F ...
Neutrinos and Nucleosynthesis
... inwards. This leads to a compression of the core of the massive star up to nuclear densities, during this process a neutron star is formed in the center of the old star. There is also the possibility to produce a black hole in the center, but this case won’t be considered here. During the collapse o ...
... inwards. This leads to a compression of the core of the massive star up to nuclear densities, during this process a neutron star is formed in the center of the old star. There is also the possibility to produce a black hole in the center, but this case won’t be considered here. During the collapse o ...
Self Assessment: Life Cycle of a Star
... b) Hydrogen rich gases from a red giant are pulled onto the surface of a white dwarf in a binary system, and the white dwarf undergoes fusion at its surface, producing enormous amounts of energy in a short burst. c) A star's core depletes its hydrogen fuel, and begins to collapse, radiating heat o ...
... b) Hydrogen rich gases from a red giant are pulled onto the surface of a white dwarf in a binary system, and the white dwarf undergoes fusion at its surface, producing enormous amounts of energy in a short burst. c) A star's core depletes its hydrogen fuel, and begins to collapse, radiating heat o ...
Stellar Physics, VT 2010 Problem Set 2
... Consider the set of equations of stellar structure (Prialnik eqs. 5.1 to 5.4) for a main-sequence star with mass M > M and mean molecular weight µ, where nuclear energy is released mainly by hydrogen burning via the CNO cycle and the energy flux is dominated by radiative transport. Assume an ideal ...
... Consider the set of equations of stellar structure (Prialnik eqs. 5.1 to 5.4) for a main-sequence star with mass M > M and mean molecular weight µ, where nuclear energy is released mainly by hydrogen burning via the CNO cycle and the energy flux is dominated by radiative transport. Assume an ideal ...
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.