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2016 Fiscal Year Annual Research Report

Demographics and physics of active supermassive black holes

Research Project

Project/Area Number 26800098
Research InstitutionNational Astronomical Observatory of Japan

Principal Investigator

SCHULZE ANDREAS  国立天文台, 光赤外研究部, 特別客員研究員 (60721842)

Project Period (FY) 2014-04-01 – 2017-03-31
KeywordsAGN evolution / supermassive black holes / quasars
Outline of Annual Research Achievements

I have carried out a study to understand the origin of radio-loudness of quasars and AGN. Understanding why some AGN are radio-loud, thus have strong relativistic jets, remains one of the fundamental unsolved questions in the AGN field. Based on a statistical analysis of a large sample from the Sloan Digital Sky Survey (SDSS) we have found evidence that radio-loud quasars have as a population on average a higher black hole spin than radio-quiet quasars. This provides observational support for the theoretical idea that high black hole spin is an essential factor to generate relativistic jets. The paper on this is finished and close to submission.
I started a project to determine the active black hole mass function at redshift z~4 combining samples from SDSS and COSMOS. This extends my previous work at z~1.5 to higher redshifts, beyond the peak of AGN activity and provides new constraints on AGN evolution. We obtained preliminary results on the mass function and a more refined analysis and discussion is ongoing.
I developed and tested an AGN classification pipeline for the large spectroscopic data set provided by HETDEX and successfully applied it to current commissioning data. This pipeline will be essential to identify AGN within the HETDEX data once the survey is fully running and will enable various HETDEX AGN science cases.
I carried out a preliminary analysis for data from the Atacama Large Millimeter/submillimeter Array (ALMA) Cycle 3 to study the fuelling mechanism of supermassive black holes. A more detailed analysis of the data is ongoing.

  • Research Products

    (21 results)

All 2017 2016 Other

All Int'l Joint Research (5 results) Journal Article (6 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Acknowledgement Compliant: 1 results) Presentation (10 results) (of which Int'l Joint Research: 8 results,  Invited: 2 results)

  • [Int'l Joint Research] MPE, Garching/AIP, Potsdam/MPIA, Heidelberg(Germany)

    • Country Name
      Germany
    • Counterpart Institution
      MPE, Garching/AIP, Potsdam/MPIA, Heidelberg
    • # of Other Institutions
      1
  • [Int'l Joint Research] Durham University(英国)

    • Country Name
      UNITED KINGDOM
    • Counterpart Institution
      Durham University
  • [Int'l Joint Research] NAOC, Beijing(China)

    • Country Name
      China
    • Counterpart Institution
      NAOC, Beijing
  • [Int'l Joint Research] University of Texas at Austin, Austin/Penn State University, State College(米国)

    • Country Name
      U.S.A.
    • Counterpart Institution
      University of Texas at Austin, Austin/Penn State University, State College
  • [Int'l Joint Research] CEFCA, Teruel(Spain)

    • Country Name
      Spain
    • Counterpart Institution
      CEFCA, Teruel
  • [Journal Article] Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs). II. Discovery of 32 Quasars and Luminous Galaxies at 5.7 < z < 6.82017

    • Author(s)
      Matsuoka, Yoshiki; Onoue, Masafusa; Kashikawa, Nobunari; Iwasawa, Kazushi; Strauss, Michael A.; Nagao, Tohru; Imanishi, Masatoshi; Lee, Chien-Hsiu et al. (incl. Schulze, A.)
    • Journal Title

      PASJ (HSC special issue), submitted, arXiv:1704.05854

      Volume: 印刷中 Pages: -

  • [Journal Article] The Quasar Luminosity Function at Redshift 4 with Hyper Suprime-Cam Wide Survey2017

    • Author(s)
      Akiyama, Masayuki; He, Wanqiu; Ikeda, Hiroyuki; Niida, Mana; Nagao, Tohru et al. (incl. Schulze, A.)
    • Journal Title

      PASJ (HSC special issue), submitted, arXiv:1704.05996

      Volume: 印刷中 Pages: -

  • [Journal Article] Clustering of quasars in a wide luminosity range at redshift 4 with Subaru Hyper Suprime-Cam wide field imaging2017

    • Author(s)
      He, Wanqiu; Akiyama, Masayuki et al. (incl. Schulze, A.)
    • Journal Title

      PASJ (HSC special issue), submitted, arXiv:1704.08461

      Volume: 印刷中 Pages: -

  • [Journal Article] X-ray constraints on the fraction of obscured AGN at high accretion luminosities2017

    • Author(s)
      A. Georgakakis, M. Salvato, Z. Liu, J. Buchner, W. N. Brandt, T. Tasnim Ananna, A. Schulze, Yue Shen, S. LaMassa, K. Nandra, A. Merloni, I. D. McGreer
    • Journal Title

      MNRAS accepted, arXiv:1704.08296

      Volume: 印刷中 Pages: -

  • [Journal Article] Observational constraints on the specific accretion-rate distribution of X-ray selected AGN2017

    • Author(s)
      A. Georgakakis, J. Aird, A. Schulze, T. Dwelly, M. Salvato, K. Nandra, A. Merloni, D. P. Schneider
    • Journal Title

      MNRAS submitted, arXiv:1705.01133

      Volume: 印刷中 Pages: -

  • [Journal Article] A new quadruple gravitational lens from the Hyper Suprime-Cam Survey: the puzzle of HSC J115252+0047332016

    • Author(s)
      More, Anupreeta; Lee, Chien-Hsiu; Oguri, Masamune; Ono, Yoshiaki; Suyu, Sherry H.; Chan, James H. H.; Silverman, John D.; More, Surhud; Schulze, Andreas; Komiyama, Yutaka; Matsuoka, Yoshiki; Miyazaki, Satoshi; Nagao, Tohru; Ouchi, Masami; Tait, Philip J.; Tanaka, Manobu M.; Tanaka, Masayuki; Usuda, T.; Yasuda, N.
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 465 Pages: 2411-2419

    • DOI

      10.1093/mnras/stw2924

    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Presentation] New constraints on the black hole spin in radio-loud quasars2017

    • Author(s)
      Andreas Schulze
    • Organizer
      SHAO Seminar
    • Place of Presentation
      SHAO, Shanghai, China
    • Year and Date
      2017-03-10
    • Int'l Joint Research
  • [Presentation] New constraints on the black hole spin in radio-loud quasars2017

    • Author(s)
      Andreas Schulze
    • Organizer
      KIAA Lunch talk
    • Place of Presentation
      KIAA, Beijing, China
    • Year and Date
      2017-03-08
    • Int'l Joint Research
  • [Presentation] Tracing the growth of supermassive black holes over cosmic time2017

    • Author(s)
      Andreas Schulze
    • Organizer
      NAOC Seminar
    • Place of Presentation
      NAOC, Beijing, China
    • Year and Date
      2017-03-07
    • Int'l Joint Research
  • [Presentation] Supermassive black hole growth and black hole-galaxy co-evolution2017

    • Author(s)
      Andreas Schulze
    • Organizer
      IoA Seminar
    • Place of Presentation
      Institute of Astronomy, University of Tokyo, Tokyo, Japan
    • Year and Date
      2017-01-26
  • [Presentation] Supermassive black hole growth and black hole-galaxy co-evolution2016

    • Author(s)
      Andreas Schulze
    • Organizer
      ASIAA Colloquium
    • Place of Presentation
      ASIAA, Taipei, Taiwan
    • Year and Date
      2016-12-07
    • Int'l Joint Research
  • [Presentation] The HETDEX survey and the growth history of black holes2016

    • Author(s)
      Andreas Schulze
    • Organizer
      CEFCA Colloquium
    • Place of Presentation
      CEFCA, Teruel, Spain
    • Year and Date
      2016-09-12
    • Int'l Joint Research / Invited
  • [Presentation] Insight into the fueling and feedback of AGN through their mass functions and accretion rate distribution functions2016

    • Author(s)
      Andreas Schulze
    • Organizer
      "Crossing the Rubicon: The fate of gas flows in galaxies"
    • Place of Presentation
      Santarcangelo di Romagna, Italy
    • Year and Date
      2016-09-05 – 2016-09-09
    • Int'l Joint Research
  • [Presentation] Evolution of the stellar mass function and specific accretion rate distribution function of X-ray AGN in COSMOS2016

    • Author(s)
      Andreas Schulze
    • Organizer
      "Active Galactic Nuclei: what's in a name?"
    • Place of Presentation
      ESO, Garching, Germany
    • Year and Date
      2016-06-27 – 2016-07-01
    • Int'l Joint Research
  • [Presentation] The evolution of the mass functions of active supermassive black holes and their host galaxies out to z~22016

    • Author(s)
      Andreas Schulze
    • Organizer
      BOSS Lunch Talk
    • Place of Presentation
      LBNL, Berkeley, USA
    • Year and Date
      2016-05-04
    • Int'l Joint Research
  • [Presentation] The evolution of the mass functions of active supermassive black holes and their host galaxies out to z~22016

    • Author(s)
      Andreas Schulze
    • Organizer
      ISAS Astrophysics Colloquium
    • Place of Presentation
      ISAS/JAXA, Sagamihara, Japan
    • Year and Date
      2016-04-21
    • Invited

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Published: 2018-01-16   Modified: 2022-02-16  

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