Fr.: lobe d'antenne
A three-dimensional section of the → radiation pattern ofa directional antenna, bounded by one or more cones of nulls or by regions of diminished irradiance.
Fr.: globe céleste
A small globe representing the celestial sphere, on which the apparent positions of the stars are indicated.
double-lobed radio source
xan-e râdioyi bâ lap-e dotâyi
Fr.: radio source à double lobe
A → galaxy that emits radio energy from two regions located on opposite sides of the galaxy.
A spherical body; sphere.
M.E. globe, from M.Fr. globe, from L. globus "round body, ball, sphere," cognate with Pers. guy, see below.
Guy "ball, sphere," variants golulé, gullé, goruk, gulu, gudé; cf. Skt. guda- "ball, mouthful, lump, tumour," Pali gula- "ball," Gk. gloutos "rump," L. glomus "ball," globus "globe," Ger. Kugel, E. clot; PIE *gel- "to make into a ball."
General: A roundish projection that is part of a larger structure.
From M.L. lobus, from L.L. lobus "hull, husk, pod," from Gk. lobos "lobe of the ear, vegetable pod," probably related to leberis "husk of fruits;" from PIE base *lep- "to peel, flay."
Lap "lobe," variants lâp, lâb "piece, big piece, big cut," lappé "split pea; any of the two parts of a timber split through the length," maybe cognate with Gk. lobos, as above. Alternatively, related to Pers. las "loose," PIE *leu- "to loosen, divide, cut apart" (cf. Gk. lyein "to loosen, untie, slacken," lysus "a loosening;" L. luere "to loose, release;" → analysis).
Fr.: fonction de lobe
The configuration of the response lobes of a radiotelescope.
kuasâr-e lap ciré
Fr.: quasar à lobes dominants
A → radio-loud quasar in which the lobes dominate the whole emission. It has been conjectured that this phenomenon is an → orientation effect. If the → jet is close to the plane of the sky, the lobes will dominate. See also → core-dominated quasar.
Fr.: lobe principal
The lobe in the reception pattern of a radio telescope that includes the region of the maximum received power. Also called major lobe and main beam.
Fr.: lobe radio
An extended region of diffuse radio emission, often dumbbell shaped, that surrounds a radio galaxy.
Fr.: lobe de Roche
The region around a star in a → binary system within which orbiting material is gravitationally bound to that star. The point at which the Roche lobes of the two stars touch is called the → inner Lagrangian point. → equipotential surface.
Roche lobe overflow (RLOF)
sarriz-e lap-e Roche
Fr.: débordement du lobe de Roche
A process in a → binary system when a star fills its → Roche lobe, often by becoming a → giant or → supergiant during the later stages of → stellar evolution. When the star expands, any material that passes beyond the Roche lobe will flow onto the binary → companion, often by way of an → accretion disk. This occurs through the → inner Lagrangian point where the gravity of the two stars cancels. The RLOF is responsible for a number of phenomena including → cataclysmic variables, → Type Ia supernovae, and many → X-ray binary systems.
Fr.: lobe secondaire
1) In → radio astronomy,
smaller amounts of gain found either side of the main lobe.