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Blazar

A blazar.
Umjetnički prikaz blazara.

Blazar je aktivna galaktička jezgra (AGN) sa relativističkim mlazom (mlazom koji se sastoji od jonizovane materije koji putuje skoro brzinom svjetlosti ) koji je usmjeren prema Zemlji. Relativističko zračenje elektromagnetne radijacije iz mlaza čini blazare mnogo svjetlijim nego što bi to bilo ako bi mlaz bio usmjeren u pravcu udaljenom od Zemlje. [1] Blazari su moćni izvori emisije u elektromagnetnom spektru i posmatrani su kao izvori fotona gama zračenja visoke energije. Blazari su veoma promjenjljivi izvori, koji često prolaze kroz brze i dramatične fluktuacije osvjetljenosti u kratkim vremenskim intervalima (sati do nekoliko dana). Neki blazarski mlazovi pokazuju očigledno superluminalno kretanje , što je još jedna posljedica materijala u mlazu koji putuje prema posmatraču skoro brzinom svjetlosti.

Sloan Digital Sky Survey slika blazara Markariana 501 , koji ilustrira sjajnu jezgru i eliptičnu galaksiju.

Napomene

[uredi | uredi izvor]
  1. ^ Urry, C. M.; Padovani, P. (1995). "Unified Schemes for Radio-Loud Active Galactic Nuclei". Publications of the Astronomical Society of the Pacific. 107: 803. arXiv:astro-ph/9506063. Bibcode:1995PASP..107..803U. doi:10.1086/133630.

Vanjski linkovi

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Blazar
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