Fr.: objet amplificateur
barâxt-e mazdâhik, ~ riyâzi
Fr.: objet mathématique
An → abstract object dealt with in mathematics that has a definition, obeys certain properties, and can be the target of certain operations. It is often built out of other, already defined objects. Some examples are → numbers, → functions, → triangles, martices (→ matrix), → groups, and entities such as → vector spaces, and → infinite series.
Fr.: objet de Messier
Fr.: objet de Minkowski
A peculiar blue object near the → elliptical galaxy NGC 541 in the → galaxy cluster Abell 194. According to several pieces of evidence, the → starburst in Minkowski's object was triggered by the → radio jet emerging from the → nucleus of the nearby → active galaxy NGC 541. This is similar to the jet-induced → star formation associated with → Centaurus A, and the radio-aligned star forming regions in powerful radio galaxies at → high redshift. Absorption and emission line measurements and broadband → SED fitting, give an age of around 7.5 Myr for Minkowski's object.
Minkowski, R., 1958, PASP, 70, 143; → object.
Fr.: spectroscopie multi-objets
A technique of spectroscopy using fiber optics whereby several objects distributed over the field of view can be observed simultaneously.
near-Earth object (NEO)
An → asteroid, → comet, or large → meteoroid whose orbit brings it exceptionally close to the Earth, and which may therefore pose a collision danger. Most such objects are in orbits around the Sun with → perihelion distance less than 1.3 → astronomical units. See also → near-Earth asteroid.
1, 2, 3, 4, 5, 6) barâxt; 7) kondâr
1) General: Anything that is visible or tangible.
From M.L. objectum "thing thrown down or put before" (the mind or sight), neutral of objectus, p.p. of obicere "to present, oppose, cast in the way of," from ob "against" + jacere "to throw," from PIE base *ye- "to do" (cf. Gk. iemi, ienai "to send, throw," Hitt. ijami "I make").
Barâxt "thing drawn against, before" from bar- + âxt.
The prefix bar- "on; upon; against;
before; at; in," from Mid.Pers. abar, O.Pers.
upariy "above; over, upon, according to," Av. upairi "above, over"
(upairi.zəma- "located above the earth"), cf. Gk. hyper- "over, above,"
L. super-, O.H.G. ubir "over;" PIE base *uper "over".
The lens or lenses in the object end of the body tube of a microscope, by means of which the rays coming from the object examined are brought to a focus. Same as → objective. An old term for the objective lens of a refracting telescope.
Barâxti, from barâxt→ object + -i adj. suffix.
Fr.: langue objet
Any language described by a → metalanguage. For example, the sentence "In Persian, the word setâré means "star" " is part of a metalanguage (here, English), and the language described (namely Persian) is an object language. Metalanguage and object language may be identical.
Fr.: espace objet
Fr.: programme orienté objet
In computer science a programming technique that uses → objects and their interactions to design applications and programs.
Barnâme-sâzi, → programming; barâxt, → object; gerâ agent adj. of gerâyidan "to incline toward; to intend; to make for." The stem gerâ may be a variant of Mod.Pers. kil "bent, inclined" (k/g and l/r interchanges), from PIE base *klei- "to lean, incline," cognate with L. clinare "to bend" (E. declination, inclination, etc.), Gk. klinein "to cause to slope, slant, incline," Skt. sri- "to lean," O.Pers. θray-, Av. sray- "to lean," P.Gmc. *khlinen (Ger. lehnen, E. lean).
1, 2, 3) barâxti; 4) kondâri
1a) Of or pertaining to something that can exist independent of thought or
perception as part of reality. Opposite of → subjective.
Adjective of → object.
A diffraction grating placed over the aperture of a telescope in order to produce spectra of all the objects in the field of view.
A dispersing prism placed in front of a telescope objective to produce spectra of all luminous objects in the field of view.
Fr.: probabilité objective
A probability determined by the long-term frequency of an event; in contrast to subjective probability.
Fr.: objet quasi-stellaire
Initial name of → quasars.
Fr.: objet réel
In an optical system, a collection of points which actually serves as a source of light rays.
Fr.: objet rétrograde
An object which has a retrograde orbit around its primary.
Sakurai's Object (V4334 Sgr)
Fr.: objet de Sakurai
A → post-asymptotic giant branch star that in 1995 underwent sudden re-brightening due to a → helium shell flash, or → very late thermal pulse (VLTP), before embarking on a → white dwarf cooling track. Such an outburst is very rare, and in this case it is the first seen in modern times. Stellar outbursts observed in 1670 (nova CK Vul) and 1918 (nova V605 Aql) may have been caused by the same phenomenon. Since 1995, Sakurai's Object has undergone observable changes on time-scales of weeks to months. Several phases of dust production followed the outburst, with a deep optical minimum beginning in early 1999, such that any changes in the central star have since been inferred from radio and infrared observations. Subsequent observations and modeling have revealed much about the dust shell formation and the outer regions of the ejecta. This object is also the central star of an extended very faint planetary nebula (→ CSPN), confirming that the latest large mass ejection during the planetary nebula phase occurred several thousands years ago (see, e.g. H. L. Worters et al. 2009, MNRAS 393, 108 and references therein).
Named after Yukio Sakurai, a Japanese amateur astronomer, who serendipitously discovered it on February 20, 1996, when searching for comets; → object.