Astrophysics (index)about

LINER

(low-ionization nuclear emission-line region)
(galaxy nucleus emitting spectral lines for ionized and neutral atoms)

A LINER (for low-ionization nuclear emission-line region) refers to a galaxy nucleus with certain emission lines, and such a galaxy is called a LINER galaxy. Emission lines include neutral oxygen, singly-ionized oxygen, nitrogen, and sodium, but no more than weak lines on singly-ionized helium or doubly ionized oxygen or nitrogen.

LINER galaxies are common and often other than grand design spiral galaxies. More than one theory exists to explain the underlying cause:


(galaxies,galaxy nucleus,ionization)
http://en.wikipedia.org/wiki/Low-ionization nuclear emission-line region

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