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Baryon acoustic oscillations

Index Baryon acoustic oscillations

In cosmology, baryon acoustic oscillations (BAO) are regular, periodic fluctuations in the density of the visible baryonic matter (normal matter) of the universe. [1]

65 relations: Academic Press, Accelerating expansion of the universe, Angular diameter distance, Apache Point Observatory, Astronomical spectroscopy, Astronomical survey, Astrophysics and Space Science, Baryon, Big Bang, BINGO (telescope), Chi-squared test, Chronology of the universe, Comoving and proper distances, Correlation function (astronomy), Cosmic distance ladder, Cosmic microwave background, Cosmic time, Cosmological constant, Cosmology, Dark energy, Dark matter, Decoupling (cosmology), Electron, Equation of state (cosmology), Euclid (spacecraft), Expansion of the universe, Free streaming, Friedmann equations, Galaxy, General relativity, Gravitational constant, Gravity, Hubble's law, Hydrogen atom, International Journal of Modern Physics, Lambda-CDM model, Light-year, Mean free path, Monthly Notices of the Royal Astronomical Society, New Mexico, Observable universe, Optical telescope, Oscillation, Photometric system, Photon, Physics Letters, Plasma (physics), Pressure, Princeton University Press, Redshift, ..., Research in Astronomy and Astrophysics, Scale factor (cosmology), Shape of the universe, Shaw Prize, Sloan Digital Sky Survey, Sound, Speed of light, Standard ruler, Statistics, Subtended angle, Supernova, The Astrophysical Journal, Thomson scattering, WiggleZ Dark Energy Survey, Wilkinson Microwave Anisotropy Probe. Expand index (15 more) »

Academic Press

Academic Press is an academic book publisher.

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Accelerating expansion of the universe

The accelerating expansion of the universe is the observation that the universe appears to be expanding at an increasing rate, so that the velocity at which a distant galaxy is receding from the observer is continuously increasing with time.

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Angular diameter distance

The angular diameter distance is a distance measure used in astronomy.

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Apache Point Observatory

The Apache Point Observatory (APO; obs. code: 705) is an astronomical observatory located in the Sacramento Mountains in Sunspot, New Mexico, United States, approximately south of Cloudcroft.

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Astronomical spectroscopy

Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light and radio, which radiates from stars and other celestial objects.

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Astronomical survey

An astronomical survey is a general map or image of a region of the sky which lacks a specific observational target.

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Astrophysics and Space Science

Astrophysics and Space Science is a bimonthly peer-reviewed scientific journal covering astronomy, astrophysics, and space science and astrophysical aspects of astrobiology.

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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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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.

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BINGO (telescope)

BINGO (BAO Integrated Neutral Gas Observations) is a proposed telescope that will observe redshifted Hydrogen line emission by intensity mapping to measure dark energy.

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Chi-squared test

A chi-squared test, also written as test, is any statistical hypothesis test where the sampling distribution of the test statistic is a chi-squared distribution when the null hypothesis is true.

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Chronology of the universe

The chronology of the universe describes the history and future of the universe according to Big Bang cosmology.

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Comoving and proper distances

In standard cosmology, comoving distance and proper distance are two closely related distance measures used by cosmologists to define distances between objects.

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Correlation function (astronomy)

In astronomy, a correlation function describes the distribution of galaxies in the universe.

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Cosmic distance ladder

The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects.

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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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Cosmic time

Cosmic time (also known as time since the big bang) is the time coordinate commonly used in the Big Bang models of physical cosmology.

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Cosmological constant

In cosmology, the cosmological constant (usually denoted by the Greek capital letter lambda: Λ) is the value of the energy density of the vacuum of space.

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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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Dark energy

In physical cosmology and astronomy, dark energy is an unknown form of energy which is hypothesized to permeate all of space, tending to accelerate the expansion of the universe.

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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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Decoupling (cosmology)

In cosmology, decoupling refers to a period in the development of the universe when different types of particles fall out of thermal equilibrium with each other.

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Electron

The electron is a subatomic particle, symbol or, whose electric charge is negative one elementary charge.

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Equation of state (cosmology)

In cosmology, the equation of state of a perfect fluid is characterized by a dimensionless number w, equal to the ratio of its pressure p to its energy density \rho: It is closely related to the thermodynamic equation of state and ideal gas law.

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Euclid (spacecraft)

Euclid is a visible to near-infrared space telescope currently under development by the European Space Agency (ESA) and Euclid Consortium.

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Expansion of the universe

The expansion of the universe is the increase of the distance between two distant parts of the universe with time.

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Free streaming

In astronomy, a free streaming particle, often a photon, is one that propagates through a medium without scattering.

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Friedmann equations

The Friedmann equations are a set of equations in physical cosmology that govern the expansion of space in homogeneous and isotropic models of the universe within the context of general relativity.

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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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General relativity

General relativity (GR, also known as the general theory of relativity or GTR) is the geometric theory of gravitation published by Albert Einstein in 1915 and the current description of gravitation in modern physics.

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Gravitational constant

The gravitational constant (also known as the "universal gravitational constant", the "Newtonian constant of gravitation", or the "Cavendish gravitational constant"), denoted by the letter, is an empirical physical constant involved in the calculation of gravitational effects in Sir Isaac Newton's law of universal gravitation and in Albert Einstein's general theory of relativity.

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Gravity

Gravity, or gravitation, is a natural phenomenon by which all things with mass or energy—including planets, stars, galaxies, and even light—are brought toward (or gravitate toward) one another.

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Hubble's law

Hubble's law is the name for the observation in physical cosmology that.

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Hydrogen atom

A hydrogen atom is an atom of the chemical element hydrogen.

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International Journal of Modern Physics

The International Journal of Modern Physics is a series of Physics journals published by World Scientific.

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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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Light-year

The light-year is a unit of length used to express astronomical distances and measures about 9.5 trillion kilometres or 5.9 trillion miles.

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Mean free path

In physics, the mean free path is the average distance traveled by a moving particle (such as an atom, a molecule, a photon) between successive impacts (collisions), which modify its direction or energy or other particle properties.

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Monthly Notices of the Royal Astronomical Society

Monthly Notices of the Royal Astronomical Society (MNRAS) is a peer-reviewed scientific journal covering research in astronomy and astrophysics.

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New Mexico

New Mexico (Nuevo México, Yootó Hahoodzo) is a state in the Southwestern Region of the United States of America.

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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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Optical telescope

An optical telescope is a telescope that gathers and focuses light, mainly from the visible part of the electromagnetic spectrum, to create a magnified image for direct view, or to make a photograph, or to collect data through electronic image sensors.

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Oscillation

Oscillation is the repetitive variation, typically in time, of some measure about a central value (often a point of equilibrium) or between two or more different states.

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Photometric system

In astronomy, a photometric system is a set of well-defined passbands (or filters), with a known sensitivity to incident radiation.

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Photon

The photon is a type of elementary particle, the quantum of the electromagnetic field including electromagnetic radiation such as light, and the force carrier for the electromagnetic force (even when static via virtual particles).

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Physics Letters

Physics Letters was a scientific journal published from 1962 to 1966, when it split in two series now published by Elsevier.

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Plasma (physics)

Plasma (Henry George Liddell, Robert Scott, A Greek English Lexicon, on Perseus) is one of the four fundamental states of matter, and was first described by chemist Irving Langmuir in the 1920s.

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Pressure

Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.

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Princeton University Press

Princeton University Press is an independent publisher with close connections to Princeton University.

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Redshift

In physics, redshift happens when light or other electromagnetic radiation from an object is increased in wavelength, or shifted to the red end of the spectrum.

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Research in Astronomy and Astrophysics

Research in Astronomy and Astrophysics is a monthly peer-reviewed scientific journal covering all branches of astronomy and astrophysics.

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Scale factor (cosmology)

The relative expansion of the universe is parametrized by a dimensionless scale factor a. Also known as the cosmic scale factor or sometimes the Robertson–Walker scale factor, this is a key parameter of the Friedmann equations.

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Shape of the universe

The shape of the universe is the local and global geometry of the universe.

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Shaw Prize

The Shaw Prize is an annual award first presented by the Shaw Prize Foundation in 2004.

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Sloan Digital Sky Survey

The Sloan Digital Sky Survey or SDSS is a major multi-spectral imaging and spectroscopic redshift survey using a dedicated 2.5-m wide-angle optical telescope at Apache Point Observatory in New Mexico, United States.

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Sound

In physics, sound is a vibration that typically propagates as an audible wave of pressure, through a transmission medium such as a gas, liquid or solid.

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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 ruler

A standard ruler is an astronomical object for which the actual physical size is known.

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Statistics

Statistics is a branch of mathematics dealing with the collection, analysis, interpretation, presentation, and organization of data.

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Subtended angle

In geometry, an angle subtended by an arc, line segment, or other curve is one whose two rays pass through the endpoints of the arc.

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Supernova

A supernova (plural: supernovae or supernovas, abbreviations: SN and SNe) is a transient astronomical event that occurs during the last stellar evolutionary stages of a star's life, either a massive star or a white dwarf, whose destruction is marked by one final, titanic explosion.

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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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Thomson scattering

Thomson scattering is the elastic scattering of electromagnetic radiation by a free charged particle, as described by classical electromagnetism.

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WiggleZ Dark Energy Survey

The WiggleZ Dark Energy Survey was a large-scale astronomical redshift survey carried out on the 3.9 metre Anglo-Australian Telescope (AAT) at the Siding Spring Observatory, New South Wales between August 2006 and January 2011.

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Wilkinson Microwave Anisotropy Probe

The Wilkinson Microwave Anisotropy Probe (WMAP), originally known as the Microwave Anisotropy Probe (MAP), was a spacecraft operating from 2001 to 2010 which measured temperature differences across the sky in the cosmic microwave background (CMB) – the radiant heat remaining from the Big Bang.

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Redirects here:

Acoustic oscillations, Baryon Acoustic Oscillations, Baryon acoustic oscillation.

References

[1] https://en.wikipedia.org/wiki/Baryon_acoustic_oscillations

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