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55 relations: Alex Szalay, Andromeda Galaxy, Axion, Baryon, Black hole, Bulge (astronomy), Cambridge University Press, Cosmic microwave background, Cosmology, Cuspy halo problem, DAMA/LIBRA, DAMA/NaI, Dark matter, Dwarf galaxy, Dwarf galaxy problem, Electromagnetic radiation, Fuzzy cold dark matter, Galaxy, Galaxy cluster, Galaxy merger, George Blumenthal, Gravitational lens, Hot dark matter, J. Richard Bond, Jim Peebles, Joel Primack, John Kormendy, Lambda-CDM model, Martin Rees, Massive compact halo object, Meta-cold dark matter, Michael Turner (cosmologist), Milky Way, Modified Newtonian dynamics, Neutron star, Observable universe, Particle accelerator, Particle Dark Matter, Particle horizon, Physical cosmology, Physics, Planet, Quantum chromodynamics, Sandra Faber, Self-interacting dark matter, Speed of light, Standard Model, Star, Strong CP problem, Supercluster, ..., The Astrophysical Journal, Universe, Warm dark matter, Weakly interacting massive particles, White dwarf. Expand index (5 more) »
Alex Szalay
Alex Szalay is a Bloomberg Distinguished Professor of Physics and Astronomy and Computer Science at the Johns Hopkins University School of Arts and Sciences and Whiting School of Engineering.
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Andromeda Galaxy
The Andromeda Galaxy, also known as Messier 31, M31, or NGC 224, is a spiral galaxy approximately 780 kiloparsecs (2.5 million light-years) from Earth, and the nearest major galaxy to the Milky Way.
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Axion
The axion is a hypothetical elementary particle postulated by the Peccei–Quinn theory in 1977 to resolve the strong CP problem in quantum chromodynamics (QCD).
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Baryon
A baryon is a composite subatomic particle made up of three quarks (a triquark, as distinct from mesons, which are composed of one quark and one antiquark).
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Black hole
A black hole is a region of spacetime exhibiting such strong gravitational effects that nothing—not even particles and electromagnetic radiation such as light—can escape from inside it.
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Bulge (astronomy)
In astronomy, a bulge is a tightly packed group of stars within a larger formation.
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Cambridge University Press
Cambridge University Press (CUP) is the publishing business of the University of Cambridge.
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Cosmic microwave background
The cosmic microwave background (CMB, CMBR) is electromagnetic radiation as a remnant from an early stage of the universe in Big Bang cosmology.
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Cosmology
Cosmology (from the Greek κόσμος, kosmos "world" and -λογία, -logia "study of") is the study of the origin, evolution, and eventual fate of the universe.
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Cuspy halo problem
The cuspy halo problem (also known as the core-cusp problem) refers to a discrepancy between the inferred dark matter density profiles of low-mass galaxies and the density profiles predicted by cosmological N-body simulations.
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DAMA/LIBRA
The DAMA/LIBRA experiment is a particle detector experiment designed to detect dark matter using the direct detection approach, by using a matrix of NaI(Tl) scintillation detectors to detect dark matter particles in the galactic halo.
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DAMA/NaI
The DAMA/NaI experiment investigated the presence of dark matter particles in the galactic halo by exploiting the model-independent annual modulation signature.
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Dark matter
Dark matter is a theorized form of matter that is thought to account for approximately 80% of the matter in the universe, and about a quarter of its total energy density.
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Dwarf galaxy
A dwarf galaxy is a small galaxy composed of about 100 million up to several billion stars, a small number compared to the Milky Way's 200–400 billion stars.
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Dwarf galaxy problem
The dwarf galaxy problem, also known as the missing satellites problem, arises from numerical cosmological simulations that predict the evolution of the distribution of matter in the universe.
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Electromagnetic radiation
In physics, electromagnetic radiation (EM radiation or EMR) refers to the waves (or their quanta, photons) of the electromagnetic field, propagating (radiating) through space-time, carrying electromagnetic radiant energy.
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Fuzzy cold dark matter
Fuzzy cold dark matter is a hypothetical form of cold dark matter proposed to solve the cuspy halo problem.
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Galaxy
A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter.
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Galaxy cluster
A galaxy cluster, or cluster of galaxies, is a structure that consists of anywhere from hundreds to thousands of galaxies that are bound together by gravity with typical masses ranging from 1014–1015 solar masses.
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Galaxy merger
Galaxy mergers can occur when two (or more) galaxies collide.
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George Blumenthal
George R. Blumenthal (born 1945) is an American astrophysicist, astronomer, professor, and academic administrator.
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Gravitational lens
A gravitational lens is a distribution of matter (such as a cluster of galaxies) between a distant light source and an observer, that is capable of bending the light from the source as the light travels towards the observer.
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Hot dark matter
Hot dark matter (HDM) is a theoretical form of dark matter which consists of particles that travel with ultrarelativistic velocities.
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J. Richard Bond
John Richard "Dick" Bond (born 1950 in Toronto, Ontario) is a Canadian astrophysicist and cosmologist.
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Jim Peebles
Phillip James Edwin Peebles (born 1935) is a Canadian-American physicist and theoretical cosmologist who is currently the Albert Einstein Professor Emeritus of Science at Princeton University.
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Joel Primack
Joel R. Primack (born July 14, 1945) is a professor of physics and astrophysics at the University of California, Santa Cruz and is a member of the Santa Cruz Institute for Particle Physics.
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John Kormendy
John Kormendy is an American astronomer, currently the Curtis T. Vaughn, Jr.
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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).
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Martin Rees
Martin John Rees, Baron Rees of Ludlow, One or more of the preceding sentences incorporates text from the royalsociety.org website where: (born 23 June 1942) is a British cosmologist and astrophysicist.
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Massive compact halo object
A massive astrophysical compact halo object (MACHO) is any kind of astronomical body that might explain the apparent presence of dark matter in galaxy halos.
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Meta-cold dark matter
Meta-cold dark matter, also known as mCDM, is a form of cold dark matter proposed to solve the cuspy halo problem.
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Michael Turner (cosmologist)
Michael S. Turner is a theoretical cosmologist, who coined the term dark energy in 1998.
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Milky Way
The Milky Way is the galaxy that contains our Solar System.
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Modified Newtonian dynamics
Modified Newtonian dynamics (MOND) is a theory that proposes a modification of Newton's laws to account for observed properties of galaxies.
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Neutron star
A neutron star is the collapsed core of a large star which before collapse had a total of between 10 and 29 solar masses.
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Observable universe
The observable universe is a spherical region of the Universe comprising all matter that can be observed from Earth at the present time, because electromagnetic radiation from these objects has had time to reach Earth since the beginning of the cosmological expansion.
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Particle accelerator
A particle accelerator is a machine that uses electromagnetic fields to propel charged particles to nearly light speed and to contain them in well-defined beams.
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Particle Dark Matter
Particle Dark Matter: Observations, Models and Searches (2010) is an edited volume that describes the theoretical and experimental aspects of the dark matter problem from particle physics, astrophysics, and cosmological perspectives.
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Particle horizon
The particle horizon (also called the cosmological horizon, the comoving horizon (in Dodelson's text), or the cosmic light horizon) is the maximum distance from which particles could have traveled to the observer in the age of the universe.
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Physical cosmology
Physical cosmology is the study of the largest-scale structures and dynamics of the Universe and is concerned with fundamental questions about its origin, structure, evolution, and ultimate fate.
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Physics
Physics (from knowledge of nature, from φύσις phýsis "nature") is the natural science that studies matterAt the start of The Feynman Lectures on Physics, Richard Feynman offers the atomic hypothesis as the single most prolific scientific concept: "If, in some cataclysm, all scientific knowledge were to be destroyed one sentence what statement would contain the most information in the fewest words? I believe it is that all things are made up of atoms – little particles that move around in perpetual motion, attracting each other when they are a little distance apart, but repelling upon being squeezed into one another..." and its motion and behavior through space and time and that studies the related entities of energy and force."Physical science is that department of knowledge which relates to the order of nature, or, in other words, to the regular succession of events." Physics is one of the most fundamental scientific disciplines, and its main goal is to understand how the universe behaves."Physics is one of the most fundamental of the sciences. Scientists of all disciplines use the ideas of physics, including chemists who study the structure of molecules, paleontologists who try to reconstruct how dinosaurs walked, and climatologists who study how human activities affect the atmosphere and oceans. Physics is also the foundation of all engineering and technology. No engineer could design a flat-screen TV, an interplanetary spacecraft, or even a better mousetrap without first understanding the basic laws of physics. (...) You will come to see physics as a towering achievement of the human intellect in its quest to understand our world and ourselves."Physics is an experimental science. Physicists observe the phenomena of nature and try to find patterns that relate these phenomena.""Physics is the study of your world and the world and universe around you." Physics is one of the oldest academic disciplines and, through its inclusion of astronomy, perhaps the oldest. Over the last two millennia, physics, chemistry, biology, and certain branches of mathematics were a part of natural philosophy, but during the scientific revolution in the 17th century, these natural sciences emerged as unique research endeavors in their own right. Physics intersects with many interdisciplinary areas of research, such as biophysics and quantum chemistry, and the boundaries of physics are not rigidly defined. New ideas in physics often explain the fundamental mechanisms studied by other sciences and suggest new avenues of research in academic disciplines such as mathematics and philosophy. Advances in physics often enable advances in new technologies. For example, advances in the understanding of electromagnetism and nuclear physics led directly to the development of new products that have dramatically transformed modern-day society, such as television, computers, domestic appliances, and nuclear weapons; advances in thermodynamics led to the development of industrialization; and advances in mechanics inspired the development of calculus.
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Planet
A planet is an astronomical body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals.
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Quantum chromodynamics
In theoretical physics, quantum chromodynamics (QCD) is the theory of the strong interaction between quarks and gluons, the fundamental particles that make up composite hadrons such as the proton, neutron and pion.
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Sandra Faber
Sandra Moore Faber (born December 28, 1944) is an astrophysicist known for her research on the evolution of galaxies.
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Self-interacting dark matter
In astrophysics, self-interacting dark matter (SIDM) is a hypothetical form of dark matter consisting of particles with strong self-interactions.
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Speed of light
The speed of light in vacuum, commonly denoted, is a universal physical constant important in many areas of physics.
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Standard Model
The Standard Model of particle physics is the theory describing three of the four known fundamental forces (the electromagnetic, weak, and strong interactions, and not including the gravitational force) in the universe, as well as classifying all known elementary particles.
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Star
A star is type of astronomical object consisting of a luminous spheroid of plasma held together by its own gravity.
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Strong CP problem
In particle physics, the strong CP problem is the puzzling question of why quantum chromodynamics (QCD) does not seem to break CP-symmetry.
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Supercluster
A supercluster is a large group of smaller galaxy clusters or galaxy groups; it is among the largest-known structures of the cosmos.
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The Astrophysical Journal
The Astrophysical Journal, often abbreviated ApJ (pronounced "ap jay") in references and speech, is a peer-reviewed scientific journal of astrophysics and astronomy, established in 1895 by American astronomers George Ellery Hale and James Edward Keeler.
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Universe
The Universe is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy.
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Warm dark matter
Warm dark matter (WDM) is a hypothesized form of dark matter that has properties intermediate between those of hot dark matter and cold dark matter, causing structure formation to occur bottom-up from above their free-streaming scale, and top-down below their free streaming scale.
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Weakly interacting massive particles
Weakly interacting massive particles (WIMPs) are hypothetical particles that are thought to constitute dark matter.
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White dwarf
A white dwarf, also called a degenerate dwarf, is a stellar core remnant composed mostly of electron-degenerate matter.
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References
[1] https://en.wikipedia.org/wiki/Cold_dark_matter
