Neutron Stars & Black Holes
... Neutron-Star Binaries In 1992, a pulsar was discovered whose period had unexpected, but very regular, variations. These variations were thought to be consistent with a planet, which must have been picked up by the neutron star, not the progenitor star: ...
... Neutron-Star Binaries In 1992, a pulsar was discovered whose period had unexpected, but very regular, variations. These variations were thought to be consistent with a planet, which must have been picked up by the neutron star, not the progenitor star: ...
EXTREME NEUTRON STARS Christopher Thompson Canadian Institute for Theoretical Astrophysics University of Toronto
... Bursting Soft Gamma Repeaters (earthquakes; solar flares) Something’s Creeping: SGR 1806-20 (continuous coverage 40 days 1983) many bursts ...
... Bursting Soft Gamma Repeaters (earthquakes; solar flares) Something’s Creeping: SGR 1806-20 (continuous coverage 40 days 1983) many bursts ...
How are galaxies classified
... A: If the star is massive enough, the collapse of the star will trigger a violent explosion known as a supernova. A: Supernovas are very bright and can cause a brief (few months) burst of radiation that can outshine an entire galaxy. A: During this explosion, a supernova can give off as much energy ...
... A: If the star is massive enough, the collapse of the star will trigger a violent explosion known as a supernova. A: Supernovas are very bright and can cause a brief (few months) burst of radiation that can outshine an entire galaxy. A: During this explosion, a supernova can give off as much energy ...
Today`s outline
... Question #1: Heavier nuclei have higher electric charge than lighter nuclei, therefore fusing them together requires higher temperatures in order to overcome the stronger electromagnetic repulsion. Question #2: The creation of a new core burning phase inside a star proceeds through the following eve ...
... Question #1: Heavier nuclei have higher electric charge than lighter nuclei, therefore fusing them together requires higher temperatures in order to overcome the stronger electromagnetic repulsion. Question #2: The creation of a new core burning phase inside a star proceeds through the following eve ...
Basic Constituents of the Visible and Invisible Matter
... milli meter) at relativistic energies. Thanks to the high resolution silicon detectors available now, one can identify these particles before they decay. On the other hand the W and Z bosons, being very heavy, decay practically at the instant of their creation. Nontheless they can be recognised by t ...
... milli meter) at relativistic energies. Thanks to the high resolution silicon detectors available now, one can identify these particles before they decay. On the other hand the W and Z bosons, being very heavy, decay practically at the instant of their creation. Nontheless they can be recognised by t ...
Trends in Nuclear Astrophysics
... The s-process abundances itself also contain important information about the astrophysical environment. Neutron capture reactions in the main s-process are mostly in steady flow such that Y < σv > is constant (with Y being the produced s-process abundance of an isotope along the reaction path, and < ...
... The s-process abundances itself also contain important information about the astrophysical environment. Neutron capture reactions in the main s-process are mostly in steady flow such that Y < σv > is constant (with Y being the produced s-process abundance of an isotope along the reaction path, and < ...
AY2 - Overview of the Universe
... A) Without more information, it is impossible to know how fast you would see a light beam from Earth coming toward you. If it happens that you are going fast enough so that the light can't catch you, then people on Earth would find you to be going faster than light. B) An imaginary spaceship can go ...
... A) Without more information, it is impossible to know how fast you would see a light beam from Earth coming toward you. If it happens that you are going fast enough so that the light can't catch you, then people on Earth would find you to be going faster than light. B) An imaginary spaceship can go ...
Redshift takes us from 2-D to 3-D
... But then the past shouldn’t look different than the present (on average) 3) The Universe was hot and opaque in the distant past. This is proven by the thermal cosmic background radiation. Only if all space were opaque would all space be filled with thermal photons (and their current temperature is r ...
... But then the past shouldn’t look different than the present (on average) 3) The Universe was hot and opaque in the distant past. This is proven by the thermal cosmic background radiation. Only if all space were opaque would all space be filled with thermal photons (and their current temperature is r ...
Astronomy 104: Stellar Astronomy
... core contracts (slowly at first) and heats up and heats up and heats up... •But this time, heating up can’t trigger new fusion process → core collapses under gravity... ...
... core contracts (slowly at first) and heats up and heats up and heats up... •But this time, heating up can’t trigger new fusion process → core collapses under gravity... ...
Neutrinos and Supernovae
... The incredibly high densities achieved in the stellar core create an exotic form of matter called a degenerate Fermi gas, in which the laws of quantum mechanics hold sway on a macroscopic scale. This gas forms from a set of identical fermions—particles with half-integer intrinsic spin values, such a ...
... The incredibly high densities achieved in the stellar core create an exotic form of matter called a degenerate Fermi gas, in which the laws of quantum mechanics hold sway on a macroscopic scale. This gas forms from a set of identical fermions—particles with half-integer intrinsic spin values, such a ...
Microsoft Word - LifeCycleInteractive
... has contracted. That means that density has increased, and the atoms are closer 4 Core together. If theContracts atoms are closer together, then their atomic collisions should: 5 Supernova 19. The atomic collisions have indicating that theC temperatureStar has:D Star A increased, Star B Star Star E ...
... has contracted. That means that density has increased, and the atoms are closer 4 Core together. If theContracts atoms are closer together, then their atomic collisions should: 5 Supernova 19. The atomic collisions have indicating that theC temperatureStar has:D Star A increased, Star B Star Star E ...
HIERARCHICAL GALAXY ASSEMBLY AND ITS MANIFESTATIONS
... not originating from direct cooling of gas, which turns into stars The formation mechanism is going to be imprinted in the bulge distribution. The distribution of bulge types seem to indicate that secular and classical channels are well separated. ...
... not originating from direct cooling of gas, which turns into stars The formation mechanism is going to be imprinted in the bulge distribution. The distribution of bulge types seem to indicate that secular and classical channels are well separated. ...
Life Histories Of Some Stars
... In this activity, you can see that the very massive stars live much shorted “lives” compared to the smaller, less massive stars. Why is that? Large stars, like all stars, form inside giant gaseous nebulae. An example of such a nebula is the Great Nebula in Orion (see photo). Inside nebulae, particle ...
... In this activity, you can see that the very massive stars live much shorted “lives” compared to the smaller, less massive stars. Why is that? Large stars, like all stars, form inside giant gaseous nebulae. An example of such a nebula is the Great Nebula in Orion (see photo). Inside nebulae, particle ...
Life Histories Stars
... In this activity, you can see that the very massive stars live much shorted “lives” compared to the smaller, less massive stars. Why is that? Large stars, like all stars, form inside giant gaseous nebulae. An example of such a nebula is the Great Nebula in Orion (see photo). Inside nebulae, particle ...
... In this activity, you can see that the very massive stars live much shorted “lives” compared to the smaller, less massive stars. Why is that? Large stars, like all stars, form inside giant gaseous nebulae. An example of such a nebula is the Great Nebula in Orion (see photo). Inside nebulae, particle ...
1 Charge, neutron, and weak size of the atomic nucleus G. Hagen1
... ! ≈ −0.99, is much larger than that of the proton, !! ≈ 0.07, a measurement of the parity violating asymmetry Apv (ref. 12) offers an opportunity to probe the neutron distribution. Regardless of the probe used, direct measurements of neutron distributions in nuclei are extremely difficult. For this ...
... ! ≈ −0.99, is much larger than that of the proton, !! ≈ 0.07, a measurement of the parity violating asymmetry Apv (ref. 12) offers an opportunity to probe the neutron distribution. Regardless of the probe used, direct measurements of neutron distributions in nuclei are extremely difficult. For this ...
Nuclear and Thermal Physics
... characteristic of nuclei having a large proportion of neutrons (neutron changes to proton). + emission is characteristic of nuclei having a large proportion of protons. The ejected electrons come from the nucleus rather than from the electron cloud, and yet do not exist as electrons while in the n ...
... characteristic of nuclei having a large proportion of neutrons (neutron changes to proton). + emission is characteristic of nuclei having a large proportion of protons. The ejected electrons come from the nucleus rather than from the electron cloud, and yet do not exist as electrons while in the n ...
Life Histories Of Some Stars
... In this activity, you can see that the very massive stars live much shorted “lives” compared to the smaller, less massive stars. Why is that? Large stars, like all stars, form inside giant gaseous nebulae. An example of such a nebula is the Great Nebula in Orion (see photo). Inside nebulae, particle ...
... In this activity, you can see that the very massive stars live much shorted “lives” compared to the smaller, less massive stars. Why is that? Large stars, like all stars, form inside giant gaseous nebulae. An example of such a nebula is the Great Nebula in Orion (see photo). Inside nebulae, particle ...
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.