Measuring black hole masses in X-ray bright galactic nuclei

Yi, Insu; Boughn, Stephen P.
April 2000
AIP Conference Proceedings;2000, Vol. 510 Issue 1, p435
Academic Journal
X-ray and radio emission from X-ray bright galactic nuclei such as LINERS and low luminosity Seyferts is likely to arise from hot two-temperature, advection-dominated accretion flows. The observed hard X-ray and high frequency radio luminosities could be used to estimate the central supermassive black hole masses, which has been tested in some cases with available mass estimates. Large scale and small scale jet activities appear to be an emission process additional to the accretion flow itself for which the critically rotating black hole spin is likely to be responsible. Detection of X-ray bright, low luminosity galactic nuclei in the gamma-ray range could further test the ADAF models of such sources. © 2000 American Institute of Physics.


Related Articles

  • High-redshift active galactic nuclei and H I reionisation: limits from the unresolved X-ray background. Haardt, Francesco; Salvaterra, Ruben // Astronomy & Astrophysics / Astronomie et Astrophysique;Mar2015, Vol. 575, p1 

    The rapidly declining population of bright quasars at z ≳ 3 appears to make an increasingly smaller contribution to the ionising background at the H I Lyman limit. It is thererfore generally thought that massive stars in (pre-)Galactic systems may provide the additional ionising flux...

  • Infrared observations of eight X-ray sources from Galactic plane surveys. Revnivtsev, M.; Kniazev, A.; Karasev, D.; Berdnikov, L.; Barway, S. // Astronomy Letters;Aug2013, Vol. 39 Issue 8, p523 

    Increasing the identification completeness of sources from new X-ray sky surveys is a necessary condition for further works on analyzing the formation and long-term evolution of star systems in our Galaxy. Infrared observations of several sources selected from Galactic plane surveys as...

  • Multi-Band Spectral Properties of Fermi Blazars. Dai, Benzhong; Yan, Dahai // Journal of Astrophysics & Astronomy;Mar-Jun2011, Vol. 32 Issue 1/2, p113 

    The multi-band data covering optical, X-ray and γ-ray energy regions of 130 Fermi blazars in the First LAT AGN Catalog (1LAC) were collected to investigate the broadband spectral properties. The composite spectral indices show that HBLs have convex optical-to-X-ray continua and concave...

  • Clustering of X-Ray-Selected AGN. Cappelluti, N.; Allevato, V.; Finoguenov, A. // Advances in Astronomy;2012, p1 

    The study of the angular and spatial structure of the X-ray sky has been under investigation since the times of the Einstein Xray Observatory. This topic has fascinated more than two generations of scientists and slowly unveiled an unexpected scenario regarding the consequences of the angular...

  • The Cosmic History of Black Hole Growth from DeepMultiwavelength Surveys. Treister, Ezequiel; Megan Urry, C. // Advances in Astronomy;2012, p1 

    Significant progress has been made in the last few years on understanding how supermassive black holes form and grow. In this paper, we begin by reviewing the spectral signatures of active galactic nuclei (AGN) ranging from radio to hard X-ray wavelengths. We then describe the most commonly used...

  • Uncovering local absorbed active galactic nuclei with swift and Suzaku. Winter, Lisa M. // AIP Conference Proceedings;3/30/2012, Vol. 1427 Issue 1, p185 

    Detection of absorbed active galactic nuclei and their properties remains an elusive and important problem in understanding the evolution and activation of black holes. With the very hard X-ray survey conducted by Swift's Burst Alert Telescope - the first all-sky survey in 30 years - we are...

  • Probing relativistic astrophysics around SMBHs: The Suzaku AGN spin survey. Reynolds, C. S.; Brenneman, L. W.; Lohfink, A. M.; Trippe, M. L.; Miller, J. M.; Reis, R. C.; Nowak, M. A.; Fabian, A. C. // AIP Conference Proceedings;3/30/2012, Vol. 1427 Issue 1, p157 

    In addition to providing vital clues as to the formation and evolution of black holes, the spin of black holes may be an important energy source in the Universe. Over the past couple of years, tremendous progress has been made in the realm of observational measurements of spin. In particular,...

  • Faint high-redshift AGN in the Chandra deep field south: the evolution of the AGN luminosity function and black hole demography. Fiore, F.; Puccetti, S.; Grazian, A.; Menci, N.; Shankar, F.; Santini, P.; Piconcelli, E.; Koekemoer, A.M.; Fontana, A.; Boutsia, K.; Castellano, M.; Lamastra, A.; Malacaria, C.; Feruglio, C.; Mathur, S.; Miller, N.; Pannella, M. // Astronomy & Astrophysics / Astronomie et Astrophysique;Jan2012, Vol. 537, p1 

    Context. We present detection and analysis of faint X-ray sources in the Chandra deep field south (CDFS) using the 4 Ms Chandra observation. Aims. We place constraints on active galactic nuclei (AGN) luminosity functions at z = 3-7, its cosmological evolution, and highredshift black hole and AGN...

  • AGN X-ray absorption vs. optical classification: Hints from the XRB models. Gilli, R.; Risaliti, G.; Salvati, M. // AIP Conference Proceedings;2001, Vol. 599 Issue 1, p626 

    We present a synthesis model of the cosmic X-ray background (XRB) with Active Galactic Nuclei (AGNs) where the evolution of absorbed AGNs is assumed to be faster than that of unabsorbed AGNs and to stop at a lower redshift. The model provides a good description of the XRB spectrum over the...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics