Fr.: étoile Of?p
A → massive star spectrum whose principal defining characteristics is the presence of C III 4647, 4650, 4651 emission lines with strength comparable to that of N III 4634, 4640, 4642. This category was introduced by Walborn (1972) to describe two well-known peculiar stars, HD 108 and HD 148937. → Of star
→ Of star; the question mark was intended to denote doubt that these stars are normal Of supergiants; p for "peculiar."
dur az, bar, jodâ, ...
(adverb & preposition) From a place or position; at a distance in space or time. So as to be separated from support.
M.E., from O.E. of "away, away from;" cf. Du. af "off, down," Ger. ab "off, from, down;" PIE *apo- "off, away," → apo-.
Away from a place.
→ off; cognate with Av. and O.Pers. apā "away from, from," as below.
Ap-, from apâ-, from Av. and O.Pers. apā "away from, from;" cf. Skt. apa "away, off;" L. ab- "from, away;" Hittite appa; Gothic af-; Ger. ab-; E. of, as above; PIE base *apo- "off, away"
off-axis optical system
râžmân-e nurik-e ap-âsé
Fr.: système optique hors axe
Of computers, operating independently of, or disconnected from, an associated computer.
Fr.: observation hors source
An observation when the telescope is pointed away from the source in order to measure the sky background contribution.
1) Cause to feel upset, annoyed, or resentful.
M.E. offenden, from O.Fr. ofendre "transgress, antagonize," and directly from L. offendere "to hit, strike against," figuratively "to stumble, commit a fault, displease," from assimilated form of ob "in front of against" + -fendere "to strike, push," from PIE root *gwhen- "to strike, kill;" cf. Av. -γna- "slaying," → murder.
Âfandidan, from âfand "strife, war," probably from Proto-Iranian *â-fanda-, from prefix *â- + *fanda-, from *fan- "to move;" cf. Yazghulami fin-/fud "to descend, come down," fəndan- "to bring down;" Roshani sifan-, Bartangi sifân- "to rise;" Skt. phan- "to jump" (Cheung 2007).
A person who commits an illegal act; a person or thing that does something wrong or causes problems (OxfordDictionaries.com).
1) A breach of a law or rule; an illegal act.
M.E. offence, offense, from O.Fr. ofense and directly from L. offensa "an offense, affront, crime," literally "a striking against," noun use of fem. p.p. of offendere, → offend.
1) âfandgar; 2) âfandgari
Fr.: offensif; offensive
1) Causing resentful displeasure; highly irritating, angering, or annoying.
1) A shift in the pointing position of a telescope with respect to a
Ap-, → off-; + neh present stem of nehâdan "to place, put; to set" Mid.Pers. nihâtan; Av. ni- "down; below; into," → ni-, + dā- "to put; to establish; to give," dadāiti "he gives;" cf. Skt. dadāti "he gives;" Gk. didomi "I give;" L. do "I give;" PIE base *do- "to give."
Fr.: guidage décalé
Guiding an astronomical exposure on a star, when the object of interest is nearby, but invisible.
Fr.: étoile Ofpe/WN9
A small class of evolved → massive stars showing spectral properties intermediate between those of → Of star and → WN Wolf-Rayet stars. Several of them have been found to possess non-spherical nitrogen-rich circumstellar nebulae. Ofpe/WN9 stars are considered to be transition objects between Of and W-R stars. This type of stars was first identified by Walborn (1982), who introduced the classification Ofpe/WN9, indicating that the stars could not be classified solely as Of stars, nor as WNL stars. Ofpe/WN9 stars have been found in the → Milky Way, the → Large Magellanic Cloud, → M31, and M33. Currently 10 Ofpe/WN9 stars are known in the LMC. Observational evidence suggests a close relationship between the class of → LBVs and the Ofpe/WN9 stars. A notable example is the prototype Ofpe/WN9 star R127 in the LMC that became an LBV on a time-scale of the order of a year. The possibility of such a relationship has been explored by Smith et al. (1994), who proposed that some LBVs show spectral morphologies that make them appear as an extension of the WN sequence toward later spectral types. Hence, they reclassified Ofpe/WN9 stars as WN10-11.
Ofpe, from → Of star; p for "peculiar;" e refers to the presence of other emission lines in addition to the Of ones, mainly H and He I, although also Si III. This peculiar class in the LMC was first described by Walborn (1977, ApJ 215, 53), where he called them "O Iafpe extr" based on the most similar Galactic objects known at that time. Subsequently Walborn (1983, ApJ 256, 452) and Bohannan & Walborn (1989, PASP 101, 520) suggested an extension of the WN sequence and/or transition between Of and WN. This nomenclature Ofpe/WN9 has been rather widely adopted. Later on, Smith et al. (1994) broke the Ofpe/WN9 and related Galactic types into WN10-11 subtypes to include this group of emission line stars.
Many times; frequently; in many cases.
M.E. oftin, from O.E. oft "often, frequently," akin to cognates: O.Frisian ofta, Danish ofte, O.H.G. ofto, Ger. oft, of unknown origin.
1) A Hydroxyl radical formed by abstraction of a hydrogen atom from water.
From → hydro- + ox(y)- a combining form meaning "sharp, acute, pointed, acid," used in the formation of compound words, from Gk, oxys "sharp, keen, acid" + -yl a suffix used in the names of chemical radicals, from Fr. -yle, from Gk. hyle "matter, substance."
Fr.: OH 231.8+4.2
Fr.: raie de OH
Emission or absorption lines on an electromagnetic spectrum generated by hydroxyl, → OH molecules. At present, four principal lines are known in the radio domain at frequencies of 1612, 1665, 1667, and 1720 MHz, or wavelengths of approximately 18 centimeters.
Fr.: maser OH
A → maser phenomenon created by → OH molecules with characteristic → OH lines. OH masers are detected toward a variety of astronomical environments, including massive star formation regions and evolved late-type stars.
xan-e OH (hidroksil)
Fr.: source OH
An astronomical source emitting microwave radiation characteristic of the hydroxyl OH molecule, especially one showing a maser effect. OH sources are found in molecular clouds in interstellar medium and in the cool envelopes of evolved stars.
OH, chemical compound hydroxyl; → source.
Fr.: étoile OH/IR
An evolved Mira-type star which is associated with strong OH maser and strong infrared (IR) emission from the surrounding shell of warm gas and dust.