NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-08-22 T20:26:22 PDT
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For refcode 1991AJ....101...71X:
Retrieve 68 NED objects in this reference.
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Copyright by American Astronomical Society. Reproduced by permission
1991AJ....101...71X OBSERVATIONAL DISTINCTION BETWEEN TWO TYPES OF ACTIVE GALACTIC NUCLEI G. Z. XIE, F. K. LIU, B. F. LIU, K. H. LI, AND R. W. Lu Yunnan Observatory, Academia Sinica, Kunming, China J. F. Lu Center for Astrophysics, University of Science and Technology of China, Hefei, China Received 27 September 1989; revised 18 July 1990 ABSTRACT Using three criteria, we discuss the observational distinction between relativistic beaming and pure accretion for 69 active galaxies, including Seyferts, Quasars, and BL Lac objects. The first criterion is whether the inferred efficiency of the conversion of accreted matter into energy is greater than 0.1 or not. The second one is whether the observed flux is larger than the classical Eddington luminosity or not. The third is concerned in the strong coupling of geometrical and physical effects in jets. The result suggests distinguishing active galactic nuclei into two types.
Retrieve 68 NED objects in this reference.
Please click here for ADS abstract

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