2016 Fiscal Year Annual Research Report
Demographics and physics of active supermassive black holes
| Project/Area Number |
26800098
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| Research Institution | National Astronomical Observatory of Japan |
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Principal Investigator |
SCHULZE ANDREAS 国立天文台, 光赤外研究部, 特別客員研究員 (60721842)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | AGN evolution / supermassive black holes / quasars |
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| 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.
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[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.)
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Journal Title
PASJ (HSC special issue), submitted, arXiv:1704.05854
Volume: 印刷中
Pages: -
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[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
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Journal Title
MNRAS accepted, arXiv:1704.08296
Volume: 印刷中
Pages: -
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[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.
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Journal Title
Monthly Notices of the Royal Astronomical Society
Volume: 465
Pages: 2411-2419
DOI
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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