Lobes
In radio astronomy, regions of sensitivity in an antenna pattern. Lobes are analogous to fringes in optical astronomy.
Local Arm ...
Tail lobes--the two bundles of nearly-parallel magnetic field lines which stretch into the magnetotail, on opposite sides of the plasma sheet.
Roche lobes An imaginary surface around a star. Each star in a binary system can be pictured as being surrounded by a tear-shaped zone of gravitational influence, the Roche lobe.
Some lobes are swept out into arcs behind the galaxy. This is probably caused by the galaxy moving through the gas around the galaxy.
side lobes in a two-dimensional power diagram (schematic, polar diagram) ...
of signals from one source which can be analyzed by computer. Such an analysis results in a resolution that is considerably better than that of a parabolic dish aerial by itself because of the greater effective diameter. [A84]
Radio Lobes ...
Radio jets and lobes: the existence and structure of radio sources requires some external medium providing a counterpressure, else they would freely expand and become rapidly invisible.
the complete lobe pattern of the antenna and is a function of the wavelength, feed system, and reflector characteristics, and (b) the field radiation pattern which differs primarily from the free-space pattern by the formation of interference lobes ...
The largest radio galaxies have lobes or plumes extending to megaparsec scales, implying a timescale for growth of the order of tens to hundreds of millions of years.
It was found that many such sources possess radio jets that point from the nuclei of the parent galaxies to the radio lobes.
two lobes which together form an irregular and patchy oval...A vacant lane runs between the lobes...and widens to include the central star.
When the emission from the lobes was omitted, what remained was a thermal spectrum, dominated by X-ray lines. This result conflicted with the NEI model of Hughes and Helfand, but was in agreement with Reynold and Chevalier's synchrotron model.
Before a star finishes forming, around a tenth of the matter around it may be ejected by infalling through its accretion disk and then being blown out by bi-polar jets (more NASA photos) to produce two giant lobes of molecular gas, ...
The stuff that is getting spewed will pile up over time, generally into big lobes. A classic view of a radio galaxy shows a double lobe structure.
Its two distinct lobes are about .75 kilometers (.47 miles) across. It has a narrow waist of approximately 100 to 150 meters (330 to 490 feet) in depth.
For the first time, astronomers can track the motions of hundreds of small-scale structures in the lobes which will allow them to characterize precisely how the lobes are evolving.
Radio telescopes show that some radio galaxies, called extended radio galaxies, have lobes of radio emission extending millions of light-years from their nuclei.
The nebula of dust and gas has two nearly symmetric lobes (or cones) of matter that are being ejected from a central star.
These jets would explain several puzzling features along the periphery of the gas lobes.
The team studied the disc of M2-9, a bipolar nebula - a gas cloud with symmetrical lobes - that is concealing a red giant 2,500 times more luminous than the Sun, along with a white dwarf star.
These are elliptical galaxies with nuclear radio emission, often accompanied by single or twin radio lobes (straddling the galaxy) that can be Mpc-sized.
There are usually two large lobes of gas opposite each other outside the quasars, fed by perfectly straight jets up to a million light years in length leading from the core.
The radio images from the VLA FIRST survey had shown one pair of radio-emitting lobes. The VLA's NVSS images showed another, distinct pair of lobes farther from the galaxy.
Recent detailed pictures of radio galaxies, obtained with high resolution radio telescopes such as the VLA, often show a prominent jet of material connecting a bright, compact radio source at the galactic nucleus to the more extended radio lobes ...
Pars intermedia is the boundary between the anterior and posterior lobes of the pituitary. It contains three types of cells - Anterior pituitary basophils, chromophobes, and colloid-filled cysts....
The frontal lobes as critical in long term planing
Neurons and connections between them, the two brain hemispheres, the corpus callosum
The evolution of cities and the history of libraries, books and writing ...
This is a very large and very faint (12 mag.) planetary nebula. Two brighter lobes can be noticed in a 10 inch and larger scopes 2°30' NW of 27 Lyncis (see finder chart below).
Galileo first turned his telescope on Saturn on July 25, 1610 and it looked like three separate objects. His telescope was powerful enough to show the rings but made them appear as lobes on either side of the planet.
The theory that double radio lobes are produced by pairs of jets emitted in opposite directions from the centers of active galaxies.
Double-Line Spectroscopic Binary ...
trefoil: an heraldic ornamental design of three leaves or lobes. It is often used on dials to mark the half and/or quarter hour lines. Sometimes it is simplified to just three dots arranged in a triangle.
contact binary A binary star system in which both stars have expanded to fill their Roche lobes and the surfaces of the two stars merge. The binary system now consists of two nuclear burning stellar cores surrounded by a continuous common envelope.
In the radio-loud objects a contribution from the jet and the lobes it inflates dominates the luminosity of the AGN, at least at radio wavelengths but possibly at some or all others.
double-lobed radio source: A galaxy that emits radio energy from two regions (lobes) located on opposite sides of the galaxy.
Drake equation: A formula for the number of communicative civilizations in our galaxy.
The point at which the Roche lobes of the two stars touch is called the inner Lagrangian or L1 point.
Two lobes of radio emission are fed by jets of energetic particles from the galaxy core. (I thank Philip Blanco for this description. Philip has a web page devoted to Cygnus A. Those interested just set their search engine to 'Cygnus A'.) ...
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112. Double-Exhaust Model
The theory that double radio lobes are produced by pairs of jets emitted in opposite directions from the centers of active galaxies.
The Roche lobes of each component, which in isolation would be spheroidal, are drawn out into cone-like extensions meeting at a point between the two stars known as the Lagrangian point, ...
Common Envelope - A stage in the evolution of a close pair of stars in which matter shed by one of the stars fills the region just outside the Roche lobes of the two stars ...
It contains a reddish emission nebula, a blue reflection nebula, a dark nebula, and an open cluster of stars. The nebula's name means "divided into three lobes.
Any of a class of galaxies whose luminosity is greatest in radio wavelengths. Radio galaxies are usually large elliptical galaxies, with synchrotron radiation emitted from one or more pairs of lobes located on opposite sides of the visible galaxy.
If one of the stars is big enough to transfer mass through the Lagrange point then the system is a semidetached binary. If both stars fill their Roche lobes then the system is known as a contact binary.
It appears to have two lobes, with dimensions km. On Sep. 24, 2004, Toutatis will pass within a scant 0.010360 (4 lunar distances) of (Hudson and Ostro 1995).
Similarly, the outer edge of the A ring, and of the main ring system itself, is in 7:6 resonance with the co-orbital satellites Janus and Epimetheus and is scalloped with seven lobes.
 See also: Light, Field, Energy, Time, Distance
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