An Etymological Dictionary of Astronomy and Astrophysics

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Number of Results: 2 Search : BLR

broad-line radio galaxy (BLRG)

رادیو‌کهکشان ِ پهن-خط

radio kahkašân-e pahn-xatt

Fr.: galaxie radio à raies larges

A radio galaxy that shows broad optical emission lines. → broad-line region.

→ broad; → line; → radio galaxy.

broad-line region (BLR)

ناحیه‌ی ِ پهن-خط

nâhiye-ye pahn-xatt

Fr.: région à raies larges

The inner region of a → quasar or an → active galactic nucleus exhibiting broad → spectral lines which indicate ionized matter moving with speeds in excess of 10,000 km sec^-1, probably due to the presence of an → accretion disk surrounding a → supermassive black hole. Also called Type I AGN. See also → obscuring torus.

→ broad; → line; → region.

An Etymological Dictionary of Astronomy and Astrophysics
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