Flux (or radiant flux), F, is the total amount of energy that crosses a unit area per unit time. Flux is measured in joules per square metre per second (joules/m2/s), or watts per square metre (watts/m2).
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Definition: flux: A measure of the amount of energy given off by an astronomical object over a fixed amount of time and area.
The maximum flux of escape for a species with a given mixing ratio at the .
Flux Transfer Event
A flux transfer event (FTE) occurs when a magnetic portal opens in the Earth's magnetosphere through which high-energy particles flow from the Sun.
FLUX DENSITY - Measure of the flux of radiant energy within a unit interval of frequency (a frequency band with a width of 1 Hz) and is expressed as W/m2Hz.
Flux. The rate of flow of a physical quantitiy through a reference surface.
Flux: The rate of transfer of fluid, particles, or energy across a given surface.
Frequency: Number of wave vibrations per second; 1 Hertz is one cycle per second (e.g., 1420 MHz = 1,420,000,000 vibrations per second).
Flux: The rate of transfer of fluid, particles, or energy across a given surface.
Free-free Emission: The emission of radio waves from interstellar clouds as electrons momentarily bind with ionized atoms, and then move on to other atoms.
flux: A measure of the flow of energy onto or through a surface. Usually applied to light.
focal length: The distance from a lens to the point where it focuses parallel rays of light.
Flux Unit
(a) Unit of flux density. 1 f.u. = 10-26 watts per square meter per hertz (see Jansky).
(b) In radio astronomy energy is usually measured in units of 10-26 W m-2 Hz-1.
Flux Unit [LLM96]
FU Ori Stars or Fuors
A subgroup of T Tau stars with considerable changes in brightness. The post-eruption spectrum is that of a late supergiant. [JJ95]
Full Width at Half-Maximum ...
Io Flux Tube
A tube of magnetic lines and electric currents connecting Io and Jupiter.
Ion ...
Solar flux
Solar flux is a measurement of the intensity of solar radio emissions at a frequency of 2800 MHz made using a radio telescope
Radio telescope ...
Energy Flux - The rate at which a wave carries energy through a given area
Energy Level - Any of the many energy states that an atom may have. Different energy levels correspond to different distances of the electron from the nucleus ...
Flux ropes are thought to play a key role in the production of CMEs, and Lucie Green of University College London says, ...
flux
A measure of the flow of energy out of a surface. Usually applied to light.
focal length ...
Flux and energy spectrum of primary electrons (1 - 13 GeV)
S36
Solar X-rays 1 - 20 Angstroms ...
Flux by Stephen Baxter - Novel
A branch of humanity has been engineered to exist in the curst of a neutron star.
Flux The rate of particle flow over time.
Fusion A type of nuclear reaction in which two atomic nuclei combine to form a heavier nucleus, releasing energy.
A.. B.. C.. D.. E.. F.. G.. H.. I.. J.. K.. L.. M..
Flux
The flow of fluid, particles, or energy through a given area within a certain time. In astronomy, this term is often used to describe the rate at which light flows.
Flux is energy per unit area, so a computation of the total energy given off by a star requires knowing how big the star is (which is why in the above example we said that stars A and B had the same size).
Flux: A flux is the rate at which something is transferred through a surface, like 10 flies per minute through the busted screen door.
flux - (n.)
The amount of something (such as energy) passing through a surface per unit time.
focal length - (n.) ...
The flux density in Jy can be converted to a Magnitude basis, for suitable assumptions about the spectrum. For instance, converting an AB magnitude to a flux-density in microjansky is straightforward: ...
The flux (flow rate) of cosmic rays incident on the Earth's upper atmosphere is modulated (varied) by two processes; the sun's solar wind and the Earth's magnetic field.
The flux of boron-8 neutrinos is highly sensitive to the temperature of the core of the sun, .
Magnetic flux is a measure of flux density (a Gauss is the magnetic flux per square centimeter).
GEGENSCHEIN
Gegenschein (meaning "counterglow") is a very faint glow in the sky that appears exactly opposite to .
V-filter flux for stars
(183K GIF)
This is M67 in Cancer taken on April 25, 1995 at the Physics Department, Brown University, Providence, RI, USA. (Courtesy of Brown University)
(49K GIF) ...
Electron Flux
the rate of flow of electrons through a reference surface. In cgs units, measured in electrons s-1, or simply s-1.
If Iois the flux density of the solar beam just outside the earth's atmosphere, I the flux density measured at the earth's surface with the sun at a zenith distance which implies an optical air mass m , and Im, ...
The mass and flux of dust particles was determined by the dust instrument detector (DID), which detected the high velocity impacts on the protective shield of Giotto.
What is solar flux? Since they are counted when seen, sunspots are a subjective measurement. To have a more objective measurement of the Sun's output, scientists use the 10.7 cm solar flux -- a general measurement of the activity of the Sun. The 10.
Vocabulary
flux Inverse Square Law of Light Brightness
Formulae ...
neutron flux The sum of the distances traveled by all the neutrons in 1 cubic centimeter in 1 second. Normally the figure must be energy qualified, e.g., thermal, intermediate, or fast neutron flux.
In Flux The electromagnetic radiation that streams out of the Sun is a hailstorm of photons. The x-rays are like bowling-ball-size hailstones: potent, but thankfully rare.
The solar wind is a flux of particles, chiefly protons and electrons together with nuclei of heavier elements in smaller numbers, that are accelerated by the high temperatures of the solar corona, or outer region of the Sun, ...
by the sum of the following five components a) Importance of ionizing radiation as indicated by time- associated Short Wave Fade or Sudden Ionospheric Disturbance; (Scale 0-3) b) Importance of H-Alpha flare; (Scale 0-3) c) Magnitude of 10cm flux; ...
The field of view was approximately a cone with a half-angle of 25°, and the flux range of the detector was from 5E4 to 5E9/(sq cm-sec).
Two different surveys at 20 cm (the NVSS and FIRST projects) have been carried out with the VLA, covering most of the accessible sky to flux limits typically a few mJy for point sources.
Flares are usually classified by their associated flux of X rays having wavelengths between one and eight angstroms: Cn, Mn, or Xn for flux greater than 10{sup -6}, 10{sup -5}, and 10{sup -4} watts per square metre (w/m ), respectively, ...
Broadband and frequent x-ray flares and quiescent x-ray flux in both the inner bright stars Aab and Bab pairs as well as the outer pair of flare stars Cab, or YY Geminorum AB, have been repeatedly observed (Güdel et al, 2001; Gotthelf et al, 1994; ...
All scientific knowledge is thus always in a state of flux, for at any time new evidence could be presented/discovered/developed that contradicts a long-held hypothesis. A particularly luminous example is the theory of light.
magnetic fields, the flux of cosmic rays and micrometeorites, and properties of celestial objects that are difficult or impossible to observe from the earth.
Another indicator of the level of solar activity is the flux of radio emission from the Sun at a wavelength of 10.7 cm (2.8 GHz frequency). This flux has been measured daily since 1947.
The amount of magnetic flux that rises up to the Sun's surface varies with time in a cycle called the solar cycle. This cycle lasts 11 years on average. This cycle is sometimes referred to as the sunspot cycle.
During the final destruction of the star in a supernova explosion, a high flux of neutrons is released as iron nuclei are ripped apart.
Calculate the energy flux"that is, the energy received per unit area per unit time"that would be observed at Earth from a 1037-W Seyfert nucleus located at the Galactic center, neglecting the effects of interstellar extinction.
CAPS includes an ion mass spectrometer providing species-resolved measurements of the flux of positive atomic and molecular ions as a function of energy/charge vs aperture entry direction; ...
As Io moves around its orbit in the strong magnetic field of Jupiter and through this plasma torus, a huge electrical current is set up between Io and Jupiter in a cylinder of highly concentrated magnetic flux called the Io Flux Tube.
The difference between element synthesis in red giants and supernovae is that in supernovae the flux of neutrons is greater and it is possible for the atom to capture a second, or third neutron, before it has a chance to beta-decay.
sunspot an area seen as a dark spot on the photosphere of the Sun; sunspots are concentrations of magnetic flux, typically occurring in bipolar clusters or groups; they appear dark because they are cooler than the surrounding photosphere.
A unit used in radio astronomy to indicate the flux density (the rate of flow of radio waves) of electromagnetic radiation received from outer space. A typical radio source has a spectral flux density of roughly 1 Jy.
The jansky (abbreviated Jy) is a unit of radio flux density (the rate of flow of radio waves); 1 Jy = 10-26 watts/m2/Hz. A typical radio source has a spectral flux density of roughly 1 Jy.
bolometric magnitude - A measure of the flux of radiation from a star or other object received just outside the earth's atmosphere, as it would be detected by a device sensitive to all forms of electromagnetic energy.
The Enterprise-D approaches the McAllister C-5-Nebula, a protostellar nebula A protostellar nebula is a type of nebula that contains high levels of particle flux.
That gas is strongly ionised by the central X-ray source: atoms are stripped of some or most of their electrons when illuminated by the powerful flux of X-rays.
An Arc Jet uses an electric arc to heat a controlled mixture of oxygen and nitrogen, which is then accelerated and ejected out of the nozzle at hypersonic speed to simulate the gradient heat flux environment of the re-entry vehicle as it skids and ...
Apparent magnitude is also referred to as flux. It is a measure of how bright a celestial object appears to us. The apparent magnitude of an object depends upon its real brightness and on its distance from us.
This darkening persisted into the 1980's & 1990's along with other changes near Elysium, notably the lightening of the wedge-shaped feature, Trivium Charontis. The entire region near the huge Elysium volcanoes appears to be in a state of flux ...
7 times that of the Sun and reveal that the star is not just sitting there quietly fusing helium into carbon and oxygen, but is in a state of flux, most likely still brightening and swelling with a dead helium core, ...
 See also: Light, Energy, Earth, Time, Field
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