What We Talk about When We Talk about Blazars

Frontiers in Astronomy and Space Sciences

Foschini, Luigi¹ 

[1] INAF – Osservatorio Astronomico di Brera, Lecco, Italy

关键词: relativistic jet;    Blazar;    quasar;    BL Lac object;    Narrow-Line Seyfert 1 Galaxy;    black hole;    neutron star;   

DOI  :  10.3389/fspas.2017.00006

学科分类：空间科学

来源: Frontiers

【 摘 要 】

After the discovery of powerful relativistic jets from Narrow-Line Seyfert 1 Galaxies, and the understanding of their similarity with those of blazars, a problem of terminology was born. The word blazar is today associated to BL Lac Objects and Flat-Spectrum Radio Quasars, which are somehow different from Narrow-Line Seyfert 1 Galaxies. Using the same word for all the three classes of AGN could drive either toward some misunderstanding, or to the oversight of some important characteristics. I review the main characteristics of these sources, and finally I propose a new scheme of classification.

【 授权许可】

CC BY