Document
... • Olbers’ paradox asks why the night sky is dark, when every line of sight must eventually fall on a star. Which of the following reasons would best explain the darkness at night? It is because the universe is: a. b. c. d. e. ...
... • Olbers’ paradox asks why the night sky is dark, when every line of sight must eventually fall on a star. Which of the following reasons would best explain the darkness at night? It is because the universe is: a. b. c. d. e. ...
PPT
... Start and End of Inflation (See Scientific American, Jan. 1999 for articles on the difference between getting stuck for a while in a false vacuum and gradually rolling out of a false vacuum.) The frozen symmetrical field has, at least for a while, a fixed density- driving inflation. • In this scena ...
... Start and End of Inflation (See Scientific American, Jan. 1999 for articles on the difference between getting stuck for a while in a false vacuum and gradually rolling out of a false vacuum.) The frozen symmetrical field has, at least for a while, a fixed density- driving inflation. • In this scena ...
The First Three Minutes of Creation
... information, to a vastly larger scale than the actual horizon when this begins. By the time inflation comes to an end and the horizon returns to its normal extent determined by time elapsed since the Big Bang, there is more matter than we even see today in our current horizon that has entered brief ...
... information, to a vastly larger scale than the actual horizon when this begins. By the time inflation comes to an end and the horizon returns to its normal extent determined by time elapsed since the Big Bang, there is more matter than we even see today in our current horizon that has entered brief ...
PowerPoint Presentation - The Origin of the Universe
... – Dark Energy has precisely the same effect as Einstein’s cosmological constant – So, he was probably right all along! ...
... – Dark Energy has precisely the same effect as Einstein’s cosmological constant – So, he was probably right all along! ...
PPT Slides
... – 73% mysterious “dark energy” (we’re not even sure of the physics of this substance!) detected by its repulsive gravity causing the cosmic expansion to accelerate ...
... – 73% mysterious “dark energy” (we’re not even sure of the physics of this substance!) detected by its repulsive gravity causing the cosmic expansion to accelerate ...
ASTRONOMY 5
... really not points but rather tiny “strings” that exist and vibrate in a higherdimensional space “rolled up” inside the Planck length. These extra ...
... really not points but rather tiny “strings” that exist and vibrate in a higherdimensional space “rolled up” inside the Planck length. These extra ...
George`s slides
... mass of par5cles, which dominate that epoch: the Universe as the ul5mate accelerator? • As the energies increase, different physical regimes and different fundamental interac5ons come into play • The closer we get to the Big Bang (i.e., further away from the experimentally probed regime), the l ...
... mass of par5cles, which dominate that epoch: the Universe as the ul5mate accelerator? • As the energies increase, different physical regimes and different fundamental interac5ons come into play • The closer we get to the Big Bang (i.e., further away from the experimentally probed regime), the l ...
Chapter26
... the two particles cancel and the mass of the particles is entirely converted to energy. antimatter — The type of matter that annihilates ordinary matter on contact. For every particle here is a corresponding antimatter particle. For example, the antimatter counterpart of the proton is the antiproton ...
... the two particles cancel and the mass of the particles is entirely converted to energy. antimatter — The type of matter that annihilates ordinary matter on contact. For every particle here is a corresponding antimatter particle. For example, the antimatter counterpart of the proton is the antiproton ...
talk29102009
... The theory of Cosmic Horizons is not in disagreement with the existence of a nonzero cosmological constant ...
... The theory of Cosmic Horizons is not in disagreement with the existence of a nonzero cosmological constant ...
HYM-flation: Yang-Mills cosmology with Horndeski coupling
... This second (marked by minus) solution acts as ‘inflationary attractor’, since it is valid until the Hubble parameter is approximately constant. Strictly speaking this is not an attractor of the dynamical system, but it is a regime which is met for a wide variety of integral curves starting within t ...
... This second (marked by minus) solution acts as ‘inflationary attractor’, since it is valid until the Hubble parameter is approximately constant. Strictly speaking this is not an attractor of the dynamical system, but it is a regime which is met for a wide variety of integral curves starting within t ...
The Early Universe PowerPoint
... • One possible cause – Rapid inflation very shortly after the Big Bang ...
... • One possible cause – Rapid inflation very shortly after the Big Bang ...
chapter23 - Empyrean Quest Publishers
... 1) Where does structure come from? 2) Why is the overall distribution of matter so uniform? 3) Why is the density of the universe so close to the critical density? An early episode of rapid inflation can solve all three mysteries! ...
... 1) Where does structure come from? 2) Why is the overall distribution of matter so uniform? 3) Why is the density of the universe so close to the critical density? An early episode of rapid inflation can solve all three mysteries! ...
GE: Friday morning *Cosmology and general relativity: the evolution
... of an evolution of the universe from a hot big bang to the present day has offered a series of unifications of ever more fundamental physics with cosmological models and predictions; ...
... of an evolution of the universe from a hot big bang to the present day has offered a series of unifications of ever more fundamental physics with cosmological models and predictions; ...
The Universe - UMass Astronomy
... bends the space-time, pretty much like a Black Hole bends the space around itself. • The geometry of the Universe determines its fate: • a closed Universe will at some point reverse its expansion into a contraction, and proceed towards a Big Crunch • a flat or open Universe will expand forever. ...
... bends the space-time, pretty much like a Black Hole bends the space around itself. • The geometry of the Universe determines its fate: • a closed Universe will at some point reverse its expansion into a contraction, and proceed towards a Big Crunch • a flat or open Universe will expand forever. ...
Goodbye Big Bang, hello black hole? A new theory of the
... "For all physicists know, dragons could have come flying out of the singularity," stated Niayesh This is what the physicists propose: Afshordi, an astrophysicist with the Perimeter Institute for Theoretical Physics in Canada who coThe model they constructed has the threeauthored the new study. dimen ...
... "For all physicists know, dragons could have come flying out of the singularity," stated Niayesh This is what the physicists propose: Afshordi, an astrophysicist with the Perimeter Institute for Theoretical Physics in Canada who coThe model they constructed has the threeauthored the new study. dimen ...
Institute`s Colloquium, by invitation - ICE-CSIC
... On the BGV Theorem: Introduction • Inflationary cosmological models are generically eternal in their future evolution [1981-83: Guth, Linde, Albrecht, Steinhardt, Vilenkin] • In inflation one cannot in principle conclude for any future time that the whole Universe will reach thermal equilibrium • ...
... On the BGV Theorem: Introduction • Inflationary cosmological models are generically eternal in their future evolution [1981-83: Guth, Linde, Albrecht, Steinhardt, Vilenkin] • In inflation one cannot in principle conclude for any future time that the whole Universe will reach thermal equilibrium • ...
The Universe had (probably) an origin: on the theorem of Borde
... On the BGV Theorem: Introduction • Inflationary cosmological models are generically eternal in their future evolution [1981-83: Guth, Linde, Albrecht, Steinhardt, Vilenkin] • In inflation one cannot in principle conclude for any future time that the whole Universe will reach thermal equilibrium • ...
... On the BGV Theorem: Introduction • Inflationary cosmological models are generically eternal in their future evolution [1981-83: Guth, Linde, Albrecht, Steinhardt, Vilenkin] • In inflation one cannot in principle conclude for any future time that the whole Universe will reach thermal equilibrium • ...
origins powerpoint
... • Remember Einstein’s famous equation? • E=MC2 • Energy (E) can be converted into matter (M) • All of the matter in the universe now was once a tremendous amount of energy! ...
... • Remember Einstein’s famous equation? • E=MC2 • Energy (E) can be converted into matter (M) • All of the matter in the universe now was once a tremendous amount of energy! ...
LAST YEAR`S EXAM
... Describe two of the main problems with Big Bang cosmology that are solved by cosmological inflation. Describe the concept of inflation and how it solves these two problems. (5 marks) Assuming that the field or particle which gives rise to inflation can be expressed mathematically as an effective cos ...
... Describe two of the main problems with Big Bang cosmology that are solved by cosmological inflation. Describe the concept of inflation and how it solves these two problems. (5 marks) Assuming that the field or particle which gives rise to inflation can be expressed mathematically as an effective cos ...
Age, Evolution, and Size of the Cosmos
... traditional answer: there was no time speculative ideas: Big Bounce • Big Bang is one of the greatest challenges in physics ...
... traditional answer: there was no time speculative ideas: Big Bounce • Big Bang is one of the greatest challenges in physics ...
Our Incredible Universe
... forces that created the universe. These forces actually created space and time along with all that we see around us today. During a tiny fraction of the first second, the universe went through a short period of rapidly accelerating faster-than-light expansion called “inflation.” This initial expansi ...
... forces that created the universe. These forces actually created space and time along with all that we see around us today. During a tiny fraction of the first second, the universe went through a short period of rapidly accelerating faster-than-light expansion called “inflation.” This initial expansi ...
85 nucleosynthesis26 - Boston University Physics
... between 1 and 3 minutes, temperature high enough to fuse n + p → d, then d + t → He t=tritium=3H not too high to dissociate weakly-bound d 2.2 MeV binding energy nor to destroy very stable 4He (=α) 24 MeV binding energy at t = 1 min, Big Bang predicts protons:neutrons = 7:1 after 3 minutes, universe ...
... between 1 and 3 minutes, temperature high enough to fuse n + p → d, then d + t → He t=tritium=3H not too high to dissociate weakly-bound d 2.2 MeV binding energy nor to destroy very stable 4He (=α) 24 MeV binding energy at t = 1 min, Big Bang predicts protons:neutrons = 7:1 after 3 minutes, universe ...
Early Universe : 2015 Open Note Test
... 45 g∗ T . Consider the case of (spin 2) gravitons, which decouple at T ≈ 10 GeV. Assume a hot bing bang model without inflation, so that at T > 1019 GeV the gravitons and other particles were in thermal equilibrium. (a) Describe in your own words what it means for a particle to decouple, and qualita ...
... 45 g∗ T . Consider the case of (spin 2) gravitons, which decouple at T ≈ 10 GeV. Assume a hot bing bang model without inflation, so that at T > 1019 GeV the gravitons and other particles were in thermal equilibrium. (a) Describe in your own words what it means for a particle to decouple, and qualita ...
Exploring the Early Universe - Solar Physics and Space Weather
... Inflation Theory: the flatness problem •In order for space to be flat as it is today, the mass density must have been exactly equal to critical density right after the Big Bang •If mass density were slightly smaller than the critical density, the universe would have expanded so rapidly that matter ...
... Inflation Theory: the flatness problem •In order for space to be flat as it is today, the mass density must have been exactly equal to critical density right after the Big Bang •If mass density were slightly smaller than the critical density, the universe would have expanded so rapidly that matter ...
Inflation (cosmology)
In physical cosmology, cosmic inflation, cosmological inflation, or just inflation is the exponential expansion of space in the early universe. The inflationary epoch lasted from 10−36 seconds after the Big Bang to sometime between 10−33 and 10−32 seconds. Following the inflationary period, the Universe continues to expand, but at a less rapid rate.The inflationary hypothesis was developed in the early 1980s. It explains the origin of the large-scale structure of the cosmos. Quantum fluctuations in the microscopic inflationary region, magnified to cosmic size, become the seeds for the growth of structure in the Universe (see galaxy formation and evolution and structure formation). Many physicists also believe that inflation explains why the Universe appears to be the same in all directions (isotropic), why the cosmic microwave background radiation is distributed evenly, why the Universe is flat, and why no magnetic monopoles have been observed.While the detailed particle physics mechanism responsible for inflation is not known, the basic picture makes a number of predictions that have been confirmed by observation. The hypothetical field thought to be responsible for inflation is called the inflaton.In 2002, three of the original architects of the theory were recognized for their major contributions; physicists Alan Guth of M.I.T., Andrei Linde of Stanford and Paul Steinhardt of Princeton shared the prestigious Dirac Prize ""for development of the concept of inflation in cosmology"".