This is the Title - Astronomy at Swarthmore College
... where they have burnt their hydrogen core. The resulting gravitational collapse provides the densities necessary to begin helium burning. The star begins to accumulate a carbon and oxygen core with helium and then hydrogen in shells around the core. Helium burning occurs in short phases when conditi ...
... where they have burnt their hydrogen core. The resulting gravitational collapse provides the densities necessary to begin helium burning. The star begins to accumulate a carbon and oxygen core with helium and then hydrogen in shells around the core. Helium burning occurs in short phases when conditi ...
jbrown_keck - Astronomy at Swarthmore College
... where they have burnt their hydrogen core. The resulting gravitational collapse provides the densities necessary to begin helium burning. The star begins to accumulate a carbon and oxygen core with helium and then hydrogen in shells around the core. Helium burning occurs in short phases when conditi ...
... where they have burnt their hydrogen core. The resulting gravitational collapse provides the densities necessary to begin helium burning. The star begins to accumulate a carbon and oxygen core with helium and then hydrogen in shells around the core. Helium burning occurs in short phases when conditi ...
10-18-2015
... light years and 93 billion light years diameter. Thus Hubble Volume is thus almost the same as Observable Universe & these two terms are often used interchangeably ...
... light years and 93 billion light years diameter. Thus Hubble Volume is thus almost the same as Observable Universe & these two terms are often used interchangeably ...
Fluorine abundances in dwarf stars of the solar neighbourhood⋆
... F abundances for a sample of giants in the Large Magellanic Cloud and in the globular cluster ω Cen. They found that the abundance ratio of F/O declines as the oxygen abundance decreases. They therefore suggested that the observed low values of F/O exclude AGB synthesis as the dominant source of flu ...
... F abundances for a sample of giants in the Large Magellanic Cloud and in the globular cluster ω Cen. They found that the abundance ratio of F/O declines as the oxygen abundance decreases. They therefore suggested that the observed low values of F/O exclude AGB synthesis as the dominant source of flu ...
- California State University
... composition of how the elements formed, specifically light elements. The idea behind nucleosynthesis is that the light elements, such as hydrogen, were formed when the Universe cooled from an initially hotter, denser radiation at temperatures that would not allow the binding energies of atom formati ...
... composition of how the elements formed, specifically light elements. The idea behind nucleosynthesis is that the light elements, such as hydrogen, were formed when the Universe cooled from an initially hotter, denser radiation at temperatures that would not allow the binding energies of atom formati ...
Multiple sources or late injection of short-lived r
... early solar system (ESS) conclusively showed that these nuclides cannot simply be derived from galactic chemical evolution (GCE) if synthesized in a unique stellar environment. It was thus suggested that two different types of stars were responsible for the production of light and heavy r-nuclides. H ...
... early solar system (ESS) conclusively showed that these nuclides cannot simply be derived from galactic chemical evolution (GCE) if synthesized in a unique stellar environment. It was thus suggested that two different types of stars were responsible for the production of light and heavy r-nuclides. H ...
**** 1 - Asiaa
... constant with time, we can adopt the Local bulgeblack hole mass relation to high-z Universe. 2. At z > 10, quasar density is expected to decrease significantly, and GRBs are good candidate radio ...
... constant with time, we can adopt the Local bulgeblack hole mass relation to high-z Universe. 2. At z > 10, quasar density is expected to decrease significantly, and GRBs are good candidate radio ...
Test 4 Review
... weightless. Einstein says these are equivalent. So in freefall, light and ball also travel in straight lines. 3. Now imagine two people in freefall on Earth, passing a ball back and forth. From their perspective, they pass it in a straight line. From a stationary perspective, it follows a curved pat ...
... weightless. Einstein says these are equivalent. So in freefall, light and ball also travel in straight lines. 3. Now imagine two people in freefall on Earth, passing a ball back and forth. From their perspective, they pass it in a straight line. From a stationary perspective, it follows a curved pat ...
ASTROPHYSICS AND COSMOLOGY
... In this paper, we study the model of a homogeneous and isotropic Universe with non-zero cosmological constant filled with a perfect gas of low-velocity cosmic strings. Throughout the paper, we will refer to this model as the ΛCS model. It is shown that pressure-free matter can obtain the properties ...
... In this paper, we study the model of a homogeneous and isotropic Universe with non-zero cosmological constant filled with a perfect gas of low-velocity cosmic strings. Throughout the paper, we will refer to this model as the ΛCS model. It is shown that pressure-free matter can obtain the properties ...
Nuclear Astrophysics
... For temperatures T < 100 MK, the beta decay lifetimes of 13N and 15O are much shorter compared to the lifetimes of 12C and 14N to destruction by protons. In other words, as soon as a 12C + p (or 14N + p) reaction creates 13N (15O) , the newly produced 13N (15O) basically decay before the next new 1 ...
... For temperatures T < 100 MK, the beta decay lifetimes of 13N and 15O are much shorter compared to the lifetimes of 12C and 14N to destruction by protons. In other words, as soon as a 12C + p (or 14N + p) reaction creates 13N (15O) , the newly produced 13N (15O) basically decay before the next new 1 ...
The Evolution of the Universe - Western Washington University
... extreme that matter as we know it today did not exist. During the early part of its existence, after one times ten to the minus 12th of a second, our universe was so small and dense that light and matter intertwined; space was hot, dark, and ionized—filled with a plasma of charged particles. By the ...
... extreme that matter as we know it today did not exist. During the early part of its existence, after one times ten to the minus 12th of a second, our universe was so small and dense that light and matter intertwined; space was hot, dark, and ionized—filled with a plasma of charged particles. By the ...
Anthropic Principle, Cosmomicrophysics and Biosphere
... Be the way it is reasonable to note that the formation of the planet Earth and its biosphere took place 4.5 · 109 and 4 · 109 years ago, correspondingly. This formation occurred after the beginning of the Universe spread acceleration, 5 milliards years ago, when the Universe enters into a new phase ...
... Be the way it is reasonable to note that the formation of the planet Earth and its biosphere took place 4.5 · 109 and 4 · 109 years ago, correspondingly. This formation occurred after the beginning of the Universe spread acceleration, 5 milliards years ago, when the Universe enters into a new phase ...
The Origin of Matter-Antimatter Asymmetry Ning Bao Prashant Saraswat
... Evidence for Matter/Antimatter Asymmetry Obviously in our local area of the Universe (solar system, Milky Way) consists of matter. Can’t tell if distant galaxies consist of matter or antimatter– spectra etc. all the same. Universe could consist of domains of matter and antimatter, with net baryon ...
... Evidence for Matter/Antimatter Asymmetry Obviously in our local area of the Universe (solar system, Milky Way) consists of matter. Can’t tell if distant galaxies consist of matter or antimatter– spectra etc. all the same. Universe could consist of domains of matter and antimatter, with net baryon ...
Type II supernovae (Inma Dominguez)
... At central He exhaustion, He burning moves to a shell just outside the CO core The following evolution is characterized by the development of a convective He-burning shell limited by the CO core and by the H-burning shell. The chemical composition of this shell, that will be active till the collapse ...
... At central He exhaustion, He burning moves to a shell just outside the CO core The following evolution is characterized by the development of a convective He-burning shell limited by the CO core and by the H-burning shell. The chemical composition of this shell, that will be active till the collapse ...
Document
... implying that all mass eigenstates are limited, meaning active neutrinos cannot be the dark matter. This is independently confirmed by the cosmology limits. Both results had important contributions from theory. • New limits on diffuse SN neutrino flux. Astrophysical uncertainties are now reduced to ...
... implying that all mass eigenstates are limited, meaning active neutrinos cannot be the dark matter. This is independently confirmed by the cosmology limits. Both results had important contributions from theory. • New limits on diffuse SN neutrino flux. Astrophysical uncertainties are now reduced to ...
Chapter 2
... • Energy from Big Bang transformed into matter (more details of this matter/energy relationship in Chapter 21). • Fusing of fundamental/subatomic particles (protons/neutrons) created atomic nuclei. ...
... • Energy from Big Bang transformed into matter (more details of this matter/energy relationship in Chapter 21). • Fusing of fundamental/subatomic particles (protons/neutrons) created atomic nuclei. ...
Paper
... cosmology. According to the new theory, most of the inner halo dark matter of galaxies consists of planetary mass objects that formed soon after the plasma to neutral gas transition 300,000 years after the Big Bang. These objects are termed primordial fog particles (PFPs) and provide an explanation ...
... cosmology. According to the new theory, most of the inner halo dark matter of galaxies consists of planetary mass objects that formed soon after the plasma to neutral gas transition 300,000 years after the Big Bang. These objects are termed primordial fog particles (PFPs) and provide an explanation ...
Computational Capacity of the Universe
... size. The well-established inflationary scenario will be used to investigate computation in the first fraction of a second [12]. For the sake of compactness, the effects of possible extra dimensions, pre-big-bang physics, sub-Planck scale physics, etc., will not be considered here. In other words, w ...
... size. The well-established inflationary scenario will be used to investigate computation in the first fraction of a second [12]. For the sake of compactness, the effects of possible extra dimensions, pre-big-bang physics, sub-Planck scale physics, etc., will not be considered here. In other words, w ...
In 1929, the astronomer Edwin Hubble observed that the light from
... The observations made by Hubble support the idea that the Universe is expanding. This means that galaxies are continually moving away from each other and from the Earth. Figure 2 shows a student using a balloon to model the idea of an expanding Universe. Some dots, which represent galaxies, were ma ...
... The observations made by Hubble support the idea that the Universe is expanding. This means that galaxies are continually moving away from each other and from the Earth. Figure 2 shows a student using a balloon to model the idea of an expanding Universe. Some dots, which represent galaxies, were ma ...
attached file
... Baryonic matter: this is "ordinary matter" composed primarily of protons, neutrons and electrons. This form of matter has essentially no pressure of cosmological importance. Dark matter: this generally refers to "exotic" non-baryonic matter that interacts only weakly with ordinary matter. While no s ...
... Baryonic matter: this is "ordinary matter" composed primarily of protons, neutrons and electrons. This form of matter has essentially no pressure of cosmological importance. Dark matter: this generally refers to "exotic" non-baryonic matter that interacts only weakly with ordinary matter. While no s ...
Matter and antimatter in the same universe?
... should the universe be made only of matter? In fact, if the matter-antimatter symmetry were perfect, there should be in principle antigalaxies. But now, if we accept, following experimental suggestions, that there was an instant of creation, why did not matter and antimatter annihilate immediately a ...
... should the universe be made only of matter? In fact, if the matter-antimatter symmetry were perfect, there should be in principle antigalaxies. But now, if we accept, following experimental suggestions, that there was an instant of creation, why did not matter and antimatter annihilate immediately a ...
Sample pages 1 PDF
... Mersini-Houghton proposed a model of entangled universes, under which they predict two huge voids, not just one (Frankel 2011). One of them has been found by WMAP data, and new data is expected to reveal a second similar void. The recently launched Planck satellite by the European Space Agency, whos ...
... Mersini-Houghton proposed a model of entangled universes, under which they predict two huge voids, not just one (Frankel 2011). One of them has been found by WMAP data, and new data is expected to reveal a second similar void. The recently launched Planck satellite by the European Space Agency, whos ...
Document
... Prior to the Big Bang neither time nor space existed. The Big Bang occurred 13.7 billion years ago, creating spacetime. At the start, the Universe had zero size and was infinitely hot. After 1 second, the temperature of the Universe was 10 billion degrees During the first three minutes, hydrogen (75 ...
... Prior to the Big Bang neither time nor space existed. The Big Bang occurred 13.7 billion years ago, creating spacetime. At the start, the Universe had zero size and was infinitely hot. After 1 second, the temperature of the Universe was 10 billion degrees During the first three minutes, hydrogen (75 ...
slides
... Can we see all of the Milky way galaxy from the Earth? What is the reason we see Milky way as a luminous cloud? What is most distant object in the universe can be seen with the unaided eye? What are the dark areas in the Milky way, devoid of any stars? What are the Magellanic clouds? Are they visibl ...
... Can we see all of the Milky way galaxy from the Earth? What is the reason we see Milky way as a luminous cloud? What is most distant object in the universe can be seen with the unaided eye? What are the dark areas in the Milky way, devoid of any stars? What are the Magellanic clouds? Are they visibl ...
The Big Bang and Stellar Evolution
... 5 - There is no way to expand it. How can you expand what isn’t there? Even if that magical vacuum could somehow be pulled together by gravity, what would then cause the pile of emptiness to push outward? The “gravity” which brought it together would keep it from expanding. 6 - Nothingness cannot pr ...
... 5 - There is no way to expand it. How can you expand what isn’t there? Even if that magical vacuum could somehow be pulled together by gravity, what would then cause the pile of emptiness to push outward? The “gravity” which brought it together would keep it from expanding. 6 - Nothingness cannot pr ...