SHADES paper VII (b)
... and the probability that a galaxy at z will act as a lens • Differences due to cosmology are much bigger than differences due to lens model uncertainty • Plot shows normalized p(zL) but in principle the absolutes give even stronger constraints on cosmology ...
... and the probability that a galaxy at z will act as a lens • Differences due to cosmology are much bigger than differences due to lens model uncertainty • Plot shows normalized p(zL) but in principle the absolutes give even stronger constraints on cosmology ...
Let there be an astronomical body i that is an aggregate of a very
... arbitrarily large scales then the cosmological principle, which stipulates that the universe is homogeneous on the largest scales, may require modification [3]. It is important to note, however, that a fractal distribution of galaxies is not necessarily inconsistent with the cosmological principle i ...
... arbitrarily large scales then the cosmological principle, which stipulates that the universe is homogeneous on the largest scales, may require modification [3]. It is important to note, however, that a fractal distribution of galaxies is not necessarily inconsistent with the cosmological principle i ...
1 Dark matter and dark energy comprise over 90% of the Universe
... ± km s-1 Mpc-1 (Hinshaw et al. 2008). These cosmological observations mean the Universe is flat, with Ω0 = 1. Other evidence of dark matter is exhibited in galaxy clusters such as Abell 2029 (see Figures 1 and 2) which are surrounded by x-ray emitting gas in excess of a million degrees. The luminous ...
... ± km s-1 Mpc-1 (Hinshaw et al. 2008). These cosmological observations mean the Universe is flat, with Ω0 = 1. Other evidence of dark matter is exhibited in galaxy clusters such as Abell 2029 (see Figures 1 and 2) which are surrounded by x-ray emitting gas in excess of a million degrees. The luminous ...
ppt - RESCEU
... Primordial Gaussianity No strong constraints yet due to small sample size (But SDSS LRG sample & future deep redshift surveys) ...
... Primordial Gaussianity No strong constraints yet due to small sample size (But SDSS LRG sample & future deep redshift surveys) ...
Origin of the Chemical Elements
... certain moment fluctuations with a wavelength bigger than the horizon were ‗felt‘ as constant fields and did not influence anymore the gravitational evolution of the matter and radiation at smaller length scale. The inflationary period in the evolution of the Universe ended at about 10−32 s after th ...
... certain moment fluctuations with a wavelength bigger than the horizon were ‗felt‘ as constant fields and did not influence anymore the gravitational evolution of the matter and radiation at smaller length scale. The inflationary period in the evolution of the Universe ended at about 10−32 s after th ...
Thermal history of the universe with dark energy
... From the ground constructed by so many researchers over the years and from the speculations of other many on the unsolved mysteries of the cosmos, we can approximate our universe with various models that reproduce with more or less precision the observational data we were able to collect so far. In ...
... From the ground constructed by so many researchers over the years and from the speculations of other many on the unsolved mysteries of the cosmos, we can approximate our universe with various models that reproduce with more or less precision the observational data we were able to collect so far. In ...
Dark Stars: Dark Matter annihilation can power the first stars
... from extended adiabatic contraction • Previously we thought dark matter runs out in a million years with 800 M¤ stars: end up with a donut, i.e., big spherical halo of dark matter with hole in the middle • But, triaxial haloes have all kinds of orbits (box orbits, chaotic orbits) so that much mor ...
... from extended adiabatic contraction • Previously we thought dark matter runs out in a million years with 800 M¤ stars: end up with a donut, i.e., big spherical halo of dark matter with hole in the middle • But, triaxial haloes have all kinds of orbits (box orbits, chaotic orbits) so that much mor ...
The Square Kilometre Array Fact sheet for journalists
... The SKA will look back to the Dark Ages, a time before theUniverse lit up, to discover how the earliest black holes and stars were formed. [ What generates the giant magnetic fields in space? ...
... The SKA will look back to the Dark Ages, a time before theUniverse lit up, to discover how the earliest black holes and stars were formed. [ What generates the giant magnetic fields in space? ...
Document
... is the Square Kilometre Array (SKA). It will be an array telescope with a collecting area of 106 m2 operating in the wavelength range from 3 cm to 40 m. However, among all new instrumentation projects, the most promising tool for making significant progress in this field is undoubtedly the James Web ...
... is the Square Kilometre Array (SKA). It will be an array telescope with a collecting area of 106 m2 operating in the wavelength range from 3 cm to 40 m. However, among all new instrumentation projects, the most promising tool for making significant progress in this field is undoubtedly the James Web ...
Word - The Open University
... reduced. This has important implications for the ways in which the four fundamental interactions manifest themselves at different epochs. The four fundamental interactions, that is electromagnetic interaction, weak interaction, strong interaction and gravitational interaction, have very different st ...
... reduced. This has important implications for the ways in which the four fundamental interactions manifest themselves at different epochs. The four fundamental interactions, that is electromagnetic interaction, weak interaction, strong interaction and gravitational interaction, have very different st ...
Georges Lemaître, The beginning of the world from
... and, since Lemaître was also fascinated by the brand new theory of quantum mechanics, one should not forget to mention (f) L’indétermination de la loi de Coulomb3 [8] in the August 8 issue of the Annales de la Société Scientifique de Bruxelles, in which he applied Heisenberg’s uncertainty principle ...
... and, since Lemaître was also fascinated by the brand new theory of quantum mechanics, one should not forget to mention (f) L’indétermination de la loi de Coulomb3 [8] in the August 8 issue of the Annales de la Société Scientifique de Bruxelles, in which he applied Heisenberg’s uncertainty principle ...
Colour and Luminosity Trends from the 6dFGS
... 2MASS affords digital (as opposed to photographic) photometry over the wide sky areas now spanned by redshift surveys ...
... 2MASS affords digital (as opposed to photographic) photometry over the wide sky areas now spanned by redshift surveys ...
Why do we Still Believe in Newton`s Law? Facts, Myths and Methods
... encountered observational problems even in the solar system [4] now. The experimental situation motivates to try an overview on all possible and available tests of gravity.2 Due to the amount of material, I must refer to other review articles where appropriate. The experimental and observational evi ...
... encountered observational problems even in the solar system [4] now. The experimental situation motivates to try an overview on all possible and available tests of gravity.2 Due to the amount of material, I must refer to other review articles where appropriate. The experimental and observational evi ...
Laser Interferometer Space Antenna “Listening to the Universe with
... LISA is expected to detect signals from merging supermassive black holes, compact stellar objects spiraling into supermassive black holes in galactic nuclei, thousands of close binaries of compact objects in the Milky Way and possibly backgrounds of cosmological origin. AAPT Workshop, Jan 2007 ...
... LISA is expected to detect signals from merging supermassive black holes, compact stellar objects spiraling into supermassive black holes in galactic nuclei, thousands of close binaries of compact objects in the Milky Way and possibly backgrounds of cosmological origin. AAPT Workshop, Jan 2007 ...
Media Alert A new spin on star-forming galaxies
... The research team—a collaboration between ICRAR and Swinburne University of Technology—focused on a few rare galaxies, known as the DYNAMO galaxies. They still look clumpy even though they’re seen “only” 500 million years in the past. Dr Obreschkow said looking at galaxies 500 million years ago was ...
... The research team—a collaboration between ICRAR and Swinburne University of Technology—focused on a few rare galaxies, known as the DYNAMO galaxies. They still look clumpy even though they’re seen “only” 500 million years in the past. Dr Obreschkow said looking at galaxies 500 million years ago was ...
D ASTROPHYSICS
... much less gas and dust than spiral galaxies; they are thought to have been formed from collisions between spiral galaxies. Irregular galaxies are shapeless and may have been stretched by the presence of other massive galaxies – the Milky Way appears to be having this effect on ...
... much less gas and dust than spiral galaxies; they are thought to have been formed from collisions between spiral galaxies. Irregular galaxies are shapeless and may have been stretched by the presence of other massive galaxies – the Milky Way appears to be having this effect on ...
1 A CLOSED NON-COLLAPSING 3-D UNIVERSE PREDICTING A
... has been created. Thus the creation (cosmogony) and following expansion (cosmology) of the 4-D ball (or “4-D core”) has to do with non-3-D spatial entities independent of resulting processes inside our 3-D universe. Indeed, the gravitational constant G, the speed of light C, and Planck’s constant h ...
... has been created. Thus the creation (cosmogony) and following expansion (cosmology) of the 4-D ball (or “4-D core”) has to do with non-3-D spatial entities independent of resulting processes inside our 3-D universe. Indeed, the gravitational constant G, the speed of light C, and Planck’s constant h ...
Life, the Universe, and almost Everything: Signs of Cosmic Design?
... see how far one might really get. Thus the explanandum now is the big bang and its (causal) connections to the present/observable universe. And the question is which explanans might suffice: which fundamental laws (e.g. of M-theory, supersymmetric grand unified theories, general relativity, etc.), f ...
... see how far one might really get. Thus the explanandum now is the big bang and its (causal) connections to the present/observable universe. And the question is which explanans might suffice: which fundamental laws (e.g. of M-theory, supersymmetric grand unified theories, general relativity, etc.), f ...
Kosovichev - Physics - New Jersey Institute of Technology
... Evaluate various Hertzsprung-Russell diagrams for different types of star clusters. Analyze the evolution of binary star systems. Describe Einstein’s model of the universe (both the special relativity and the general relativity theories). Describe the properties of the Milky Way galaxy. Analyze othe ...
... Evaluate various Hertzsprung-Russell diagrams for different types of star clusters. Analyze the evolution of binary star systems. Describe Einstein’s model of the universe (both the special relativity and the general relativity theories). Describe the properties of the Milky Way galaxy. Analyze othe ...
The Dark Matter Problem
... Original MOND: Phenomenological extension of Newtonian gravity → No predictions for e.g. gravitational lensing or cosmic expansion Solved by Bekenstein (2004)! Fails to explain the dynamics of galaxy clusters – some dark matter is still required Fails to explain difference between systems of similar ...
... Original MOND: Phenomenological extension of Newtonian gravity → No predictions for e.g. gravitational lensing or cosmic expansion Solved by Bekenstein (2004)! Fails to explain the dynamics of galaxy clusters – some dark matter is still required Fails to explain difference between systems of similar ...
File
... * Scientists are using a variety of methods to search for life beyond Earth. Discuss the problems involved in using these methods. ...
... * Scientists are using a variety of methods to search for life beyond Earth. Discuss the problems involved in using these methods. ...
Big Bang
The Big Bang theory is the prevailing cosmological model for the universe from the earliest known periods through its subsequent large-scale evolution. The model accounts for the fact that the universe expanded from a very high density and high temperature state, and offers a comprehensive explanation for a broad range of observed phenomena, including the abundance of light elements, the cosmic microwave background, large scale structure, and Hubble's Law. If the known laws of physics are extrapolated beyond where they are valid, there is a singularity. Modern measurements place this moment at approximately 13.8 billion years ago, which is thus considered the age of the universe. After the initial expansion, the universe cooled sufficiently to allow the formation of subatomic particles, and later simple atoms. Giant clouds of these primordial elements later coalesced through gravity to form stars and galaxies.Since Georges Lemaître first noted, in 1927, that an expanding universe might be traced back in time to an originating single point, scientists have built on his idea of cosmic expansion. While the scientific community was once divided between supporters of two different expanding universe theories, the Big Bang and the Steady State theory, accumulated empirical evidence provides strong support for the former. In 1929, from analysis of galactic redshifts, Edwin Hubble concluded that galaxies are drifting apart, important observational evidence consistent with the hypothesis of an expanding universe. In 1965, the cosmic microwave background radiation was discovered, which was crucial evidence in favor of the Big Bang model, since that theory predicted the existence of background radiation throughout the universe before it was discovered. More recently, measurements of the redshifts of supernovae indicate that the expansion of the universe is accelerating, an observation attributed to dark energy's existence. The known physical laws of nature can be used to calculate the characteristics of the universe in detail back in time to an initial state of extreme density and temperature.