Evidence for Higher Black Hole Spin in Radio-loud Quasars

Journal Article · Wed Nov 01 04:00:00 EDT 2017 · Astrophysical Journal

DOI:https://doi.org/10.3847/1538-4357/AA9181· OSTI ID:22875670

Schulze, Andreas ^[1]; Done, Chris ^[2]; Lu, Youjun ^[3]; Zhang, Fupeng ^[4]; Inoue, Yoshiyuki ^[5]

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1. National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588 (Japan)
2. Centre for Extragalactic Astronomy, Department of Physics, University of Durham, South Road, Durham, DH1 3LE (United Kingdom)
3. National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012 (China)
4. School of Physics and Astronomy, Sun Yat-Sen University, Guangzhou 510275 (China)
5. Institute of Space and Astronautical Science JAXA, 3-1-1 Yoshinodai, Chuo-ku, Sagamihara, Kanagawa 252-5210 (Japan)

One of the major unsolved questions concerning the understanding of the active galactic nucleus population is the origin of the dichotomy between radio-quiet and radio-loud quasars. The most promising explanation is provided by the spin paradigm, which suggests that radio-loud quasars have a higher black hole spin. However, the measurement of black hole spin remains extremely challenging. We here aim at comparing the mean radiative efficiencies of carefully matched samples of radio-loud and radio-quiet Sloan Digital Sky Survey (SDSS) quasars at 0.3

• OSTI ID: 22875670
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 1 Vol. 849; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
BLACK HOLES
BOLOMETERS
COMPARATIVE EVALUATIONS
EFFICIENCY
ENERGY SPECTRA
GALAXIES
GALAXY NUCLEI
LUMINOSITY
MASS
QUASARS
RED SHIFT