![The fate of black hole singularities and the parameters of the](http://s1.studyres.com/store/data/016234755_1-d1076c234bf6b7f8d88bb5544c127414-300x300.png)
The fate of black hole singularities and the parameters of the
... beginning with an initial value p∗ and letting the system evolve through N generations. Let us define a function B(p) on P that is the expected number of future singularities generated during a lifetime of a universe with parameters5 p. We may observe that, for most p, B(p) is one, but there are sma ...
... beginning with an initial value p∗ and letting the system evolve through N generations. Let us define a function B(p) on P that is the expected number of future singularities generated during a lifetime of a universe with parameters5 p. We may observe that, for most p, B(p) is one, but there are sma ...
Spiral Galaxies - Astronomy Centre
... Early astronomers did not know of the existence of dust which limits our view, and under-estimated the size of our Galaxy as about 6,000 light years across In the mid 1910s Harlow Shapley determined that the Galaxy is over 300,000 light years in size Due to this large size, Shapley believed our Gala ...
... Early astronomers did not know of the existence of dust which limits our view, and under-estimated the size of our Galaxy as about 6,000 light years across In the mid 1910s Harlow Shapley determined that the Galaxy is over 300,000 light years in size Due to this large size, Shapley believed our Gala ...
Document
... 1960 his knowledge had grown sixteenfold, and by the year 2000 it was a hundred times what it had been a century previously. The second part of the twentieth century brought a number of technical innovations, which are still very young but which are taken so much for granted that it is as if they ha ...
... 1960 his knowledge had grown sixteenfold, and by the year 2000 it was a hundred times what it had been a century previously. The second part of the twentieth century brought a number of technical innovations, which are still very young but which are taken so much for granted that it is as if they ha ...
VLBI of Pulsars with VSOP-2
... The local inertial reference frame is also the reference frame of the distant galaxies. This isn’t the case for all model universes that are consistent with General Relativity. Relative rotation of the frames can be measured using pulsar VLBI as an intermediary between the frames. ...
... The local inertial reference frame is also the reference frame of the distant galaxies. This isn’t the case for all model universes that are consistent with General Relativity. Relative rotation of the frames can be measured using pulsar VLBI as an intermediary between the frames. ...
2013. CCAT. All Rights Reserved.
... We are developing X-Spec, a multi-object wide-band direct-detection spectrometer for CCAT. X-Spec is designed for rapid full-band (195-510 GHz), moderate resolution (R~700) spectral surveys of galaxies, measuring the bright atomic fine-structure and molecular rotational transitions which cool the in ...
... We are developing X-Spec, a multi-object wide-band direct-detection spectrometer for CCAT. X-Spec is designed for rapid full-band (195-510 GHz), moderate resolution (R~700) spectral surveys of galaxies, measuring the bright atomic fine-structure and molecular rotational transitions which cool the in ...
arXiv:1505.07406v1 [hep-ph] 27 May 2015
... corresponds to the situation in the early Universe, when the number densities of different particle species, e.g., dark matter (DM) particles and photons, are universally distributed in space. That picture, comfortably accomodated in the ΛCDM cosmology supplemented by the short stage of an inflation ...
... corresponds to the situation in the early Universe, when the number densities of different particle species, e.g., dark matter (DM) particles and photons, are universally distributed in space. That picture, comfortably accomodated in the ΛCDM cosmology supplemented by the short stage of an inflation ...
Gravitational-Wave Astronomy
... the only means of directly observing certain sources, such as binaries of black holes, which are `dark' in the electromagnetic spectrum. Furthermore, the interaction of gravitational waves with matter is extremely weak, which is a great advantage for astronomy. This means that these waves arrive at ...
... the only means of directly observing certain sources, such as binaries of black holes, which are `dark' in the electromagnetic spectrum. Furthermore, the interaction of gravitational waves with matter is extremely weak, which is a great advantage for astronomy. This means that these waves arrive at ...
WHITE DWARFS AS A SOURCE OF CONSTRAINTS ON EXOTIC …
... theories in understanding stellar structure and evolution Stars serves as a source of constraints on non standard ideas Some of these constraints turn out to be more stringent than laboratory ones First idea: weakly interacting particles (axions, Kaluza-Klein gravitons, etc.) produced in hot and ...
... theories in understanding stellar structure and evolution Stars serves as a source of constraints on non standard ideas Some of these constraints turn out to be more stringent than laboratory ones First idea: weakly interacting particles (axions, Kaluza-Klein gravitons, etc.) produced in hot and ...
Galaxy alignment within dark matter halos
... Provide angular distribution information for structure (other than number count/Lumi.F/Mass F or 2PCF): galaxy distribution follows dark matter but with galaxy bias and dependence on galaxy properties Set constrains on structure formation and galaxy formation models Remove contamination on she ...
... Provide angular distribution information for structure (other than number count/Lumi.F/Mass F or 2PCF): galaxy distribution follows dark matter but with galaxy bias and dependence on galaxy properties Set constrains on structure formation and galaxy formation models Remove contamination on she ...
First Light Sources at the End of the Dark Ages: Direct
... emission-line characteristics. The longevity of the emission lines makes their detection and study conventional observations that require a baseline of 2-10 years. These are not target of opportunity observations. Undertaking searches for SNe IIn out to high redshift will reveal the evolving fractio ...
... emission-line characteristics. The longevity of the emission lines makes their detection and study conventional observations that require a baseline of 2-10 years. These are not target of opportunity observations. Undertaking searches for SNe IIn out to high redshift will reveal the evolving fractio ...
Hubble Diagram Instruction Sheet
... The Hubble diagram demonstrated that a galaxy’s redshift increased linearly with its distance from Earth. The farther away a galaxy is, the faster it moves away from us. The simplest explanation for Hubble’s observation was that the entire universe is expanding, just as Einstein's equations predicte ...
... The Hubble diagram demonstrated that a galaxy’s redshift increased linearly with its distance from Earth. The farther away a galaxy is, the faster it moves away from us. The simplest explanation for Hubble’s observation was that the entire universe is expanding, just as Einstein's equations predicte ...
Cold dark matter heats up
... We discussed above how field dwarfs have been fundamental in revealing the apparent over-concentration of dark matter at the centre of halos. Satellite dwarfs, with an order-of-magnitude fewer stars, are potentially powerful probes of the dark matter distribution at the smallest scales56. Various te ...
... We discussed above how field dwarfs have been fundamental in revealing the apparent over-concentration of dark matter at the centre of halos. Satellite dwarfs, with an order-of-magnitude fewer stars, are potentially powerful probes of the dark matter distribution at the smallest scales56. Various te ...
PDF format
... e) False, you would have an equal chance of finding an elliptical galaxy in any environment in the universe. © 2014 Pearson Education, Inc. ...
... e) False, you would have an equal chance of finding an elliptical galaxy in any environment in the universe. © 2014 Pearson Education, Inc. ...
The hot, early universe - Cosmology Block
... 11 B formation through the late-time 11 C decay. (A color version of this figure is available in the online journal.) ...
... 11 B formation through the late-time 11 C decay. (A color version of this figure is available in the online journal.) ...
Summary - X-ray Astronomy Group at ISAS
... I personally believe that we have the technology to make major steps forward As Suzaku has shown even ‘small’ improvements can have major science implications ...
... I personally believe that we have the technology to make major steps forward As Suzaku has shown even ‘small’ improvements can have major science implications ...
San Pedro Mártir observations of microvariability in obscured quasars
... effects would also affect the comparison stars, which we have detected as not variable. Because we observed during dark nights, we can rule out any variation caused by significant change in the background level. We also controlled the airmass of the observations. Since the airmass does not rise abov ...
... effects would also affect the comparison stars, which we have detected as not variable. Because we observed during dark nights, we can rule out any variation caused by significant change in the background level. We also controlled the airmass of the observations. Since the airmass does not rise abov ...
Intelligent Life in the Universe
... Creating Organics is easy Using better knowledge of the primordial ocean and atmosphere. Various energy sources can produce amino acids and nucleotide bases. Energy sources such as: solar UV radiation, lightning, volcanic heat, natural radioactivity, and atmospheric shock waves produced by meteo ...
... Creating Organics is easy Using better knowledge of the primordial ocean and atmosphere. Various energy sources can produce amino acids and nucleotide bases. Energy sources such as: solar UV radiation, lightning, volcanic heat, natural radioactivity, and atmospheric shock waves produced by meteo ...
Chapter 20. Galaxies
... reflects variations in the accretion rate. The time scale for the variations can be as short as minutes, hours, days or months. When variable galaxies on these time scales were first discovered it was hard for people to believe, since no object bigger than a few light minutes could vary on time scal ...
... reflects variations in the accretion rate. The time scale for the variations can be as short as minutes, hours, days or months. When variable galaxies on these time scales were first discovered it was hard for people to believe, since no object bigger than a few light minutes could vary on time scal ...
An analogy
... – more peculiar galaxies are observed: could be due to patchy star formation (younger age) or to interactions being more frequent (denser Universe) – resolution is poor compared to local galaxies and usually limited to a few bandpasses, and not necessarily those observed for nearby galaxies – select ...
... – more peculiar galaxies are observed: could be due to patchy star formation (younger age) or to interactions being more frequent (denser Universe) – resolution is poor compared to local galaxies and usually limited to a few bandpasses, and not necessarily those observed for nearby galaxies – select ...
A History of Astronomy, Astrophysics and Cosmology
... theories incomprehensible to the ordinary man. There were, however, physical arguments against the heliocentric hypothesis according to Aristotelian physics. First, the idea that the Earth rotates about an axis was rejected. If the Earth rotates, then, when an object is thrown up in the air, it shou ...
... theories incomprehensible to the ordinary man. There were, however, physical arguments against the heliocentric hypothesis according to Aristotelian physics. First, the idea that the Earth rotates about an axis was rejected. If the Earth rotates, then, when an object is thrown up in the air, it shou ...
Non-standard cosmology
![](https://commons.wikimedia.org/wiki/Special:FilePath/WMAP2.jpg?width=300)
A non-standard cosmology is any physical cosmological model of the universe that has been, or still is, proposed as an alternative to the Big Bang model of standard physical cosmology. In the history of cosmology, various scientists and researchers have disputed parts or all of the Big Bang due to a rejection or addition of fundamental assumptions needed to develop a theoretical model of the universe. From the 1940s to the 1960s, the astrophysical community was equally divided between supporters of the Big Bang theory and supporters of a rival steady state universe. It was not until advances in observational cosmology in the late 1960s that the Big Bang would eventually become the dominant theory, and today there are few active researchers who dispute it.The term non-standard is applied to any cosmological theory that does not conform to the scientific consensus, but is not used in describing alternative models where no consensus has been reached, and is also used to describe theories that accept a ""big bang"" occurred but differ as to the detailed physics of the origin and evolution of the universe. Because the term depends on the prevailing consensus, the meaning of the term changes over time. For example, hot dark matter would not have been considered non-standard in 1990, but would be in 2010. Conversely, a non-zero cosmological constant resulting in an accelerating universe would have been considered non-standard in 1990, but is part of the standard cosmology in 2010.