An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

A → radio-loud quasar in which the central source is enhanced by → relativistic beaming and characterized by a → flat  → spectrum. It has been conjectured that this phenomenon is an → orientation effect. If a radio-loud quasar is seen along its → jet, it will appear as a core-dominated source. See also → lobe-dominated quasar.

→ core; → dominate; → quasar.

To have control, authority, or influence; to be the most important or conspicuous person or thing.
→ core-dominated quasar, → dominant coefficient, → dominated series, → domination, → lobe-dominated quasar, → matter-dominated Universe, → radiation-dominated Universe.

From L. dominatus, p.p. of dominari "to rule, dominate, govern," from dominus, → domain.

Ciridan, from ciré "dominant; powerful; victorious," Mid.Pers. cêr "victorious, brave," Av. cirya- "able, brave."

A → series if each of its → terms does not exceed, in absolute value, the corresponding term of some convergent numerical series with positive terms.

Dominated, p.p. of → dominate; → series.

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.

→ lobe; → dominate; → quasar.

A Universe in which the matter energy density (Ω_m ≈ 1) provides most of the total energy density. According to the → Big Bang model, in the early history of the → Universe a → radiation-dominated phase preceded the matter-dominated phase. This phase is characterized by R/R₀ ∝ t^2/3, where R is the → cosmic scale factor and t is time.

→ matter; → dominate; → Universe.

An early epoch in the history of the → Universe when the radiation → density parameter was Ω_r≈ 1, while other density parameters had negligible contributions. A radiation-dominated Universe is characterized by R/R₀ ∝ t^1/2, where R is the → cosmic scale factor and t is time. According to the → Big Bang model, the radiation-dominated phase was followed by the → matter-dominated phase.

→ radiation; → dominate; → Universe.