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PH607lec12
PH607lec12

- EPJ Web of Conferences
- EPJ Web of Conferences

Physical Geology - Perry Local Schools
Physical Geology - Perry Local Schools

... Force is a vector quantity, having both magnitude and direction. The unit of force is a Newton. One Newton of net force will cause a 1 kg object to experience an acceleration of 1 m/s2. Gravitational force (weight) can be calculated from mass, but all other forces will only be quantified through for ...
b) How to Create Large Disks despite Major Mergers
b) How to Create Large Disks despite Major Mergers

... with the existence of disks • Filamentary gas accretion leads to the building of disks at higher z than predicted by standard models ...
ies la arboleda – centro tic - plurilingüe
ies la arboleda – centro tic - plurilingüe

... * Wall-e is in a bit of a mess. He does not know the correct order of these sentences. Can you help him The correct order should be: (A)- The universe was contained in a single point in space. All of the matter and energy of space was then contained at this point. What existed prior to this event is ...
UniverseofGalaxies
UniverseofGalaxies

... discovers the periodluminosity relation for Cepheid variable stars. ...
presentation (PPT format)
presentation (PPT format)

... the Hubble speed is much greater than any intrinsic motions that the galaxies might have • The value of H0? Depends on the determination of the distance (vary depending on the technique between 40100km/s/Mpc) • Because the value of H0 is somewhat uncertain usually • We express the distance in terms ...
Rebuts to the Bridgman Rebuttal
Rebuts to the Bridgman Rebuttal

... quantum effects. It is named after the physicist Stephen Hawking who provided the theoretical argument for its existence in 1974, and sometimes also after the physicist Jacob Bekenstein who predicted that black holes should have a finite, non-zero temperature and entropy. Hawking’s work followed his ...
Integrated Science Concepts COS 2010 2011
Integrated Science Concepts COS 2010 2011

... Friction and normal forces are introduced conceptually at this level. Friction is a force between two surfaces that opposes sliding. Equations of static and kinetic friction will be introduced. A normal force exists between two solid objects when their surfaces are pressed together due to other forc ...
Introduction
Introduction

... Fig. 1.1 compares images of two well-known elliptical galaxies. These galaxies have similar apparent luminosities and angular sizes; one is a little more elongated than the other, but otherwise there seems not much difference between them. Fig. 1.2, a comparison taking relative distance into account ...
PH607 – Galaxies
PH607 – Galaxies

... gas are seen as shadows against background X-ray emission. Gamma rays 1: photon energies greater than 300 MeV. At these extreme energies, most of the celestial gamma rays originate in collisions of cosmic rays with hydrogen nuclei in interstellar clouds. ...
talk
talk

Vasiliki Pavlidou - Center for Particle and Gravitational Astrophysics
Vasiliki Pavlidou - Center for Particle and Gravitational Astrophysics

... nearby transient (merger between compact objects ?)  GLAST detects it as a very bright transient gamma-ray source.  Follow up with Cherenkov detectors - high angular resolution.  LIGO detects gravitational wave emission; nature of progenitor known at high confidence A success story  Low-energy m ...
2P24.pdf
2P24.pdf

... to study their properties with spatial resolution. This data, in combination with optical and near-infrared imaging will be used to separate the regions where there is active star formation from the zones where the older underlying population dominates the luminosity. Maps of the extinction and meta ...
Teaching Text Structure with Understanding the Scale of the Universe
Teaching Text Structure with Understanding the Scale of the Universe

... development of scientsits' expanding ideas of the vastness of space. One technique for investigating other galaxies was to measure stars' brightness to determine distances in space. Another very important tool was the use of the Hubble Telescope in space for clearer photos of other galaxies deep in ...
Galaxies
Galaxies

the Full Chapter 6 -
the Full Chapter 6 -

Science Says: What Scientific Evidence Can Say About the
Science Says: What Scientific Evidence Can Say About the

... Throughout history, a debate over the origin of the universe has occurred between theists and naturalists. This has taken the form of religious arguments, philosophical hypotheses, and even scientific abstracts. Since the middle of the 19 th century, however, it appeared the naturalist side was "win ...
Galaxies - science9atsouthcarletonhs
Galaxies - science9atsouthcarletonhs

... generally follows the light profile of the galaxies' bulges. Because of their ill-defined spiral arms, if they are inclined face-on it is often difficult to distinguish between them and elliptical galaxies. ...
Lecture-25 Notes - Georgia Southern University Astrophysics
Lecture-25 Notes - Georgia Southern University Astrophysics

... This is because it took ~8-min for the light you see to travel to from the sun.! Another example: Your Aunt Gladys in Sydney, Australia sends you a post-card! every day telling you about the weather there. Each one takes a week to reach you.! So when you read about the sunny weather on Bondi Beach y ...
Document
Document

... in SNRs, GMCs, Galactic Plane/Bulge, Nearby galaxies, Nearby Clusters  Separation of electron contribution (brems. and IC) and proton contribution (pi-0) is important. Association of SNRs, history of the galaxy or the cluster  Even in galactic level, the total energy of cosmic-ray is non-negligibl ...
Document
Document

... As the light travels from its source to us, it feels the effect of the expanding universe and its wavelength is stretched (redshifted). This stretching is larger the longer the photon needs to travel and the amount of stretching is therefore an accurate measurement of the distance (redshift) to the ...
Section 4 Formation of the Universe Chapter 19
Section 4 Formation of the Universe Chapter 19

... universe began with a tremendous explosion is called the big bang theory. • Cosmic Background Radiation In 1964, two scientists using a huge antenna accidentally found radiation coming from all directions in space. One explanation for this radiation is that it is cosmic background radiation left ove ...
main characteristics of the emission from elliptical galaxies
main characteristics of the emission from elliptical galaxies

Tests of Alternative Theories of Gravity
Tests of Alternative Theories of Gravity

... Mercury perihelion shift ...
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Lambda-CDM model



The ΛCDM (Lambda cold dark matter) or Lambda-CDM model is a parametrization of the Big Bang cosmological model in which the universe contains a cosmological constant, denoted by Lambda (Greek Λ), associated with dark energy, and cold dark matter (abbreviated CDM). It is frequently referred to as the standard model of Big Bang cosmology, because it is the simplest model that provides a reasonably good account of the following properties of the cosmos: the existence and structure of the cosmic microwave background the large-scale structure in the distribution of galaxies the abundances of hydrogen (including deuterium), helium, and lithium the accelerating expansion of the universe observed in the light from distant galaxies and supernovaeThe model assumes that general relativity is the correct theory of gravity on cosmological scales.It emerged in the late 1990s as a concordance cosmology, after a period of time when disparate observed properties of the universe appeared mutually inconsistent, and there was no consensus on the makeup of the energy density of the universe.The ΛCDM model can be extended by adding cosmological inflation, quintessence and other elements that are current areas of speculation and research in cosmology.Some alternative models challenge the assumptions of the ΛCDM model. Examples of these are modified Newtonian dynamics, modified gravity and theories of large-scale variations in the matter density of the universe.
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