{ "id": "1705.10166", "version": "v1", "published": "2017-05-29T13:13:19.000Z", "updated": "2017-05-29T13:13:19.000Z", "title": "What we talk about when we talk about blazars?", "authors": [ "Luigi Foschini" ], "comment": "21 pages, 4 figures. Proceedings of the Conference \"Quasars at All Cosmic Epochs\" (Padova, Italy, April 2-7, 2017). Submitted to Frontiers in Astronomy and Space Science (Special Issue)", "categories": [ "astro-ph.HE", "astro-ph.GA" ], "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.", "revisions": [ { "version": "v1", "updated": "2017-05-29T13:13:19.000Z" } ], "analyses": { "keywords": [ "narrow-line seyfert", "bl lac objects", "flat-spectrum radio quasars", "word blazar", "powerful relativistic jets" ], "tags": [ "conference paper" ], "note": { "typesetting": "TeX", "pages": 21, "language": "en", "license": "arXiv", "status": "editable" } } }