# What we talk about when we talk about blazars?

## TL;DR

This paper reviews the characteristics of different AGN classes with relativistic jets and proposes a new classification scheme to clarify terminology and distinctions among them.

## Contribution

It introduces a novel classification scheme for AGN with jets, addressing terminology issues and highlighting differences among related galaxy types.

## Key findings

- Narrow-Line Seyfert 1 Galaxies share jet properties with blazars
- Current terminology may cause misunderstandings among AGN classes
- A new classification scheme is proposed to better distinguish these sources

## Abstract

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.