Demographics and physics of active supermassive black holes

2016 年度 実績報告書

• 研究課題/領域番号: 26800098
• 研究機関: 国立天文台
• 研究代表者: SCHULZE ANDREAS 国立天文台, 光赤外研究部, 特別客員研究員 (60721842)
• 研究期間 (年度): 2014-04-01 – 2017-03-31
• キーワード: AGN evolution / supermassive black holes / quasars

研究実績の概要

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.

研究成果

• [国際共同研究] MPE, Garching/AIP, Potsdam/MPIA, Heidelberg(Germany)
  • 国名: ドイツ
  • 外国機関名: MPE, Garching/AIP, Potsdam/MPIA, Heidelberg
  • 他の機関数: 1
• [国際共同研究] Durham University(英国)
  • 国名: 英国
  • 外国機関名: Durham University
• [国際共同研究] NAOC, Beijing(China)
  • 国名: 中国
  • 外国機関名: NAOC, Beijing
• [国際共同研究] University of Texas at Austin, Austin/Penn State University, State College(米国)
  • 国名: 米国
  • 外国機関名: University of Texas at Austin, Austin/Penn State University, State College
• [国際共同研究] CEFCA, Teruel(Spain)
  • 国名: スペイン
  • 外国機関名: CEFCA, Teruel
• [雑誌論文] Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs). II. Discovery of 32 Quasars and Luminous Galaxies at 5.7 < z < 6.8 (2017)
  • 著者名/発表者名: Matsuoka, Yoshiki; Onoue, Masafusa; Kashikawa, Nobunari; Iwasawa, Kazushi; Strauss, Michael A.; Nagao, Tohru; Imanishi, Masatoshi; Lee, Chien-Hsiu et al. (incl. Schulze, A.)
  • 雑誌名: PASJ (HSC special issue), submitted, arXiv:1704.05854 巻: 印刷中 ページ: -
• [雑誌論文] The Quasar Luminosity Function at Redshift 4 with Hyper Suprime-Cam Wide Survey (2017)
  • 著者名/発表者名: Akiyama, Masayuki; He, Wanqiu; Ikeda, Hiroyuki; Niida, Mana; Nagao, Tohru et al. (incl. Schulze, A.)
  • 雑誌名: PASJ (HSC special issue), submitted, arXiv:1704.05996 巻: 印刷中 ページ: -
• [雑誌論文] Clustering of quasars in a wide luminosity range at redshift 4 with Subaru Hyper Suprime-Cam wide field imaging (2017)
  • 著者名/発表者名: He, Wanqiu; Akiyama, Masayuki et al. (incl. Schulze, A.)
  • 雑誌名: PASJ (HSC special issue), submitted, arXiv:1704.08461 巻: 印刷中 ページ: -
• [雑誌論文] X-ray constraints on the fraction of obscured AGN at high accretion luminosities (2017)
  • 著者名/発表者名: 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
  • 雑誌名: MNRAS accepted, arXiv:1704.08296 巻: 印刷中 ページ: -
• [雑誌論文] Observational constraints on the specific accretion-rate distribution of X-ray selected AGN (2017)
  • 著者名/発表者名: A. Georgakakis, J. Aird, A. Schulze, T. Dwelly, M. Salvato, K. Nandra, A. Merloni, D. P. Schneider
  • 雑誌名: MNRAS submitted, arXiv:1705.01133 巻: 印刷中 ページ: -
• [雑誌論文] A new quadruple gravitational lens from the Hyper Suprime-Cam Survey: the puzzle of HSC J115252+004733 (2016)
  • 著者名/発表者名: 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.
  • 雑誌名: Monthly Notices of the Royal Astronomical Society 巻: 465 ページ: 2411-2419
  • DOI: 10.1093/mnras/stw2924
  • 査読あり / 国際共著 / 謝辞記載あり
• [学会発表] New constraints on the black hole spin in radio-loud quasars (2017)
  • 著者名/発表者名: Andreas Schulze
  • 学会等名: SHAO Seminar
  • 発表場所: SHAO, Shanghai, China
  • 年月日: 2017-03-10
  • 国際学会
• [学会発表] New constraints on the black hole spin in radio-loud quasars (2017)
  • 著者名/発表者名: Andreas Schulze
  • 学会等名: KIAA Lunch talk
  • 発表場所: KIAA, Beijing, China
  • 年月日: 2017-03-08
  • 国際学会
• [学会発表] Tracing the growth of supermassive black holes over cosmic time (2017)
  • 著者名/発表者名: Andreas Schulze
  • 学会等名: NAOC Seminar
  • 発表場所: NAOC, Beijing, China
  • 年月日: 2017-03-07
  • 国際学会
• [学会発表] Supermassive black hole growth and black hole-galaxy co-evolution (2017)
  • 著者名/発表者名: Andreas Schulze
  • 学会等名: IoA Seminar
  • 発表場所: Institute of Astronomy, University of Tokyo, Tokyo, Japan
  • 年月日: 2017-01-26
• [学会発表] Supermassive black hole growth and black hole-galaxy co-evolution (2016)
  • 著者名/発表者名: Andreas Schulze
  • 学会等名: ASIAA Colloquium
  • 発表場所: ASIAA, Taipei, Taiwan
  • 年月日: 2016-12-07
  • 国際学会
• [学会発表] The HETDEX survey and the growth history of black holes (2016)
  • 著者名/発表者名: Andreas Schulze
  • 学会等名: CEFCA Colloquium
  • 発表場所: CEFCA, Teruel, Spain
  • 年月日: 2016-09-12
  • 国際学会 / 招待講演
• [学会発表] Insight into the fueling and feedback of AGN through their mass functions and accretion rate distribution functions (2016)
  • 著者名/発表者名: Andreas Schulze
  • 学会等名: "Crossing the Rubicon: The fate of gas flows in galaxies"
  • 発表場所: Santarcangelo di Romagna, Italy
  • 年月日: 2016-09-05 – 2016-09-09
  • 国際学会
• [学会発表] Evolution of the stellar mass function and specific accretion rate distribution function of X-ray AGN in COSMOS (2016)
  • 著者名/発表者名: Andreas Schulze
  • 学会等名: "Active Galactic Nuclei: what's in a name?"
  • 発表場所: ESO, Garching, Germany
  • 年月日: 2016-06-27 – 2016-07-01
  • 国際学会
• [学会発表] The evolution of the mass functions of active supermassive black holes and their host galaxies out to z~2 (2016)
  • 著者名/発表者名: Andreas Schulze
  • 学会等名: BOSS Lunch Talk
  • 発表場所: LBNL, Berkeley, USA
  • 年月日: 2016-05-04
  • 国際学会
• [学会発表] The evolution of the mass functions of active supermassive black holes and their host galaxies out to z~2 (2016)
  • 著者名/発表者名: Andreas Schulze
  • 学会等名: ISAS Astrophysics Colloquium
  • 発表場所: ISAS/JAXA, Sagamihara, Japan
  • 年月日: 2016-04-21
  • 招待講演