遠赤外線・サブミリ波スペクトル観測で暴く、塵に隠された銀河化学進化

2015 Fiscal Year Annual Research Report

• Project/Area Number: 25707010
• Research Institution: Ehime University
• Principal Investigator: 長尾 透 愛媛大学, 宇宙進化研究センター, 教授 (00508450)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 光学赤外線天文学 / 電波天文学 / 宇宙物理 / 銀河進化

Outline of Annual Research Achievements

平成27年度には、塵に深く覆われ激しい星形成活動を起こしていると考えられる銀河種族のひとつ、Dust Obscured Galaxies (DOGs) に着目して研究を進めた。この DOGs は厚い塵のため可視光では極めて暗いが赤外線で明るいという特性がある。そこで、中間赤外線で全天観測を行った NASA の WISE 宇宙望遠鏡による測光データと、可視光で極めて高感度かつ広域をサーベイしつつあるすばる望遠鏡の Hyper Suprime Cam (HSC) で取得された可視光測光データを組合せ、約10平方度の天域に対して当該天体を捜索した。その結果、48個の DOGs を新たに発見することに成功した。このサンプルと過去の研究結果を比較する事で、DOGs の光度関数が銀河によく見られる Schechter 型ではなく、double power-law 型の関数で表現できることが初めて分かった。これは、DOGs の赤外線放射のエネルギー源として巨大ブラックホール活動が効いているというアイデアを支持するものである(Toba, Nagao, et al., 2015)。この結果は HSC サーベイの初期成果として国立天文台からプレスリリースされた (http://subarutelescope.org/Pressrelease/2015/08/26/)。また、こうした DOGs のうち更に極端に赤外線光度が大きなものを探査するため、Sloan Digital Sky Survey (SDSS) の可視光測光データと前述の WISE 中間赤外線データを組合せ、実際に極端に光度の高いものを選択することに成功した (Toba & Nagao 2016)。こうして選択した DOGs の分光特性から物理化学状態を研究するため、アルマ望遠鏡や岡山天体物理観測所に観測提案を行い、岡山観測所では実際に近赤外線分光観測を実施してスペクトルを取得した (現在データ解析中)。

Research Progress Status

27年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

27年度が最終年度であるため、記入しない。

Causes of Carryover

27年度が最終年度であるため、記入しない。

Expenditure Plan for Carryover Budget

27年度が最終年度であるため、記入しない。

Research Products

• [Int'l Joint Research] プリンストン大学(米国)
  • Country Name: U.S.A.
  • Counterpart Institution: プリンストン大学
• [Int'l Joint Research] 台湾中央研究院/台湾清華大学(台湾)
  • Country Name: その他の国・地域
  • Counterpart Institution: 台湾中央研究院/台湾清華大学
• [Int'l Joint Research] ケンブリッジ大学(英国)
  • Country Name: UNITED KINGDOM
  • Counterpart Institution: ケンブリッジ大学
• [Int'l Joint Research] フィレンツェ大学/アルチェトリ天文台(イタリア)
  • Country Name: ITALY
  • Counterpart Institution: フィレンツェ大学/アルチェトリ天文台
• [Journal Article] Is there any evidence that ionized outflows quench star formation in type 1 quasars at z<1? (2016)
  • Author(s): Balmaverde, B.; Marconi, A.; Brusa, M.; Carniani, S.; Cresci, G.; Lusso, E.; Maiolino, R.; Mannucci, F.; Nagao, T.
  • Journal Title: Astronomy & Astrophysics Volume: 585 Pages: id.A148
  • DOI: 10.1051/0004-6361/201526694
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Near-infrared spectroscopy of quasars at z~3 and estimates of their supermassive black hole masses (2016)
  • Author(s): Saito, Yuriko; Imanishi, Masatoshi; Minowa, Yosuke; Morokuma, Tomoki; Kawaguchi, Toshihiro; Sameshima, Hiroaki; Minezaki, Takeo; Oi, Nagisa; Nagao, Tohru; Kawatatu, Nozomu; Matsuoka, Kenta
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 68 Pages: id.1
  • DOI: 10.1093/pasj/psv102
  • Peer Reviewed
• [Journal Article] Rapidly Rising Transients from the Subaru Hyper Suprime-Cam Transient Survey (2016)
  • Author(s): Tanaka, Masaomi; Tominaga, Nozomu; Morokuma, Tomoki; Yasuda, Naoki; Furusawa, Hisanori; Baklanov, Petr V.; Blinnikov, Sergei I.; Moriya, Takashi J.; Doi, Mamoru; Jiang, Ji-an; Kato, Takahiro; Kikuchi, Yuki; Kuncarayakti, Hanindyo; Nagao, Tohru; Nomoto, Ken'ichi; Taniguchi, Yuki
  • Journal Title: The Astrophysical Journal Volume: 819 Pages: id.5
  • DOI: 10.3847/0004-637X/819/1/5
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Morphological Properties of Lyα Emitters at Redshift 4.86 in the Cosmos Field: Clumpy Star Formation or Merger? (2016)
  • Author(s): Kobayashi, Masakazu A. R.; Murata, Katsuhiro L.; Koekemoer, Anton M.; Murayama, Takashi; Taniguchi, Yoshiaki; Kajisawa, Masaru; Shioya, Yasuhiro; Scoville, Nick Z.; Nagao, Tohru; Capak, Peter L.
  • Journal Title: The Astrophysical Journal Volume: 819 Pages: id.25
  • DOI: 10.3847/0004-637X/819/1/25
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Search for Hyperluminous Infrared Dust-obscured Galaxies Selected with WISE and SDSS (2016)
  • Author(s): Toba, Y.; Nagao, T.
  • Journal Title: The Astrophysical Journal Volume: 820 Pages: id.46
  • DOI: 10.3847/0004-637X/820/1/46
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Rest-frame Optical Emission Lines in Far-infrared-selected Galaxies at z<1.7 from the FMOS-COSMOS Survey (2015)
  • Author(s): Kartaltepe, J. S.; Sanders, D. B.; Silverman, J. D.; Kashino, D.; Chu, J.; Zahid, H.; Hasinger, G.; Kewley, L.; Matsuoka, K.; Nagao, T.; Riguccini, L.; Salvato, M.; Schawinski, K.; Taniguchi, Y.; Treister, E.; Capak, P.; Daddi, E.; Ohta, K.
  • Journal Title: The Astrophysical Journal Letters Volume: 806 Pages: id.L35
  • DOI: 10.1088/2041-8205/806/2/L35
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The ALMA Patchy Deep Survey: a blind search for [C II] emitters at z~4.5 (2015)
  • Author(s): Matsuda, Y.; Nagao, T.; Iono, D.; Hatsukade, B.; Kohno, K.; Tamura, Y.; Yamaguchi, Y.; Shimizu, I.
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 451 Pages: 1141-1145
  • DOI: 10.1093/mnras/stv1044
  • Peer Reviewed
• [Journal Article] Ionised outflows in z~2.4 quasar host galaxies (2015)
  • Author(s): Carniani, S.; Marconi, A.; Maiolino, R.; Balmaverde, B.; Brusa, M.; Cano-Diaz, M.; Cicone, C.; Comastri, A.; Cresci, G.; Fiore, F.; Feruglio, C.; La Franca, F.; Mainieri, V.; Mannucci, F.; Nagao, T.; Netzer, H.; Piconcelli, E.; Risaliti, G.; Schneider, R.; Shemmer, O.
  • Journal Title: Astronomy & Astrophysics Volume: 580 Pages: id.A102
  • DOI: 10.1051/0004-6361/201526557
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The Quasar-LBG Two-point Angular Cross-correlation Function at z~4 in the COSMOS Field (2015)
  • Author(s): Ikeda, H.; Nagao, T.; Taniguchi, Y.; Matsuoka, K.; Kajisawa, M.; Akiyama, M.; Miyaji, T.; Kashikawa, N.; Morokuma, T.; Shioya, Y.; Enoki, M.; Capak, P.; Koekemoer, A. M.; Masters, D.; Salvato, M.; Sanders, D. B.; Schinnerer, E.; Scoville, N. Z.
  • Journal Title: The Astrophysical Journal Volume: 809 Pages: id.138
  • DOI: 10.1088/0004-637X/809/2/138
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Discovery of Massive, Mostly Star Formation Quenched Galaxies with Extremely Large Lyα Equivalent Widths at z~3 (2015)
  • Author(s): Taniguchi, Y.; Kajisawa, M.; Kobayashi, M. A. R.; Nagao, T.; Shioya, Y.; Scoville, N. Z.; Sanders, D. B.; Capak, P. L.; Koekemoer, A. M.; Toft, S.; McCracken, H. J.; Le Fevre, O.; Tasca, L.; Sheth, K.; Renzini, A.; Lilly, S.; Carollo, M.; Kovac, K.; Ilbert, O.; Schinnerer, E.; Fu, H.; et al.
  • Journal Title: The Astrophysical Journal Letters Volume: 809 Pages: id.L7
  • DOI: 10.1088/2041-8205/809/1/L7
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] The FMOS-COSMOS Survey of Star-forming Galaxies at z~1.6. III. Survey Design, Performance, and Sample Characteristics (2015)
  • Author(s): Silverman, J. D.; Kashino, D.; Sanders, D.; Kartaltepe, J. S.; Arimoto, N.; Renzini, A.; Rodighiero, G.; Daddi, E.; Zahid, J.; Nagao, T.; Kewley, L. J.; Lilly, S. J.; Sugiyama, N.; Baronchelli, I.; Capak, P.; Carollo, C. M.; Chu, J.; Hasinger, G.; Ilbert, O.; Juneau, S.; et al.
  • Journal Title: The Astrophysical Journal Supplement Series Volume: 220 Pages: id.12
  • DOI: 10.1088/0067-0049/220/1/12
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The MAGNUM survey: positive feedback in the nuclear region of NGC 5643 suggested by MUSE (2015)
  • Author(s): Cresci, G.; Marconi, A.; Zibetti, S.; Risaliti, G.; Carniani, S.; Mannucci, F.; Gallazzi, A.; Maiolino, R.; Balmaverde, B.; Brusa, M.; Capetti, A.; Cicone, C.; Feruglio, C.; Bland-Hawthorn, J.; Nagao, T.; Oliva, E.; Salvato, M.; Sani, E.; Tozzi, P.; Urrutia, T.; Venturi, G.
  • Journal Title: Astronomy & Astrophysics Volume: 582 Pages: id.A63
  • DOI: 10.1051/0004-6361/201526581
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] A Higher Efficiency of Converting Gas to Stars Pushes Galaxies at z~1.6 Well Above the Star-forming Main Sequence (2015)
  • Author(s): Silverman, J. D.; Daddi, E.; Rodighiero, G.; Rujopakarn, W.; Sargent, M.; Renzini, A.; Liu, D.; Feruglio, C.; Kashino, D.; Sanders, D.; Kartaltepe, J.; Nagao, T.; Arimoto, N.; Berta, S.; Bethermin, M.; Koekemoer, A.; Lutz, D.; Magdis, G.; Mancini, C.; Onodera, M.; Zamorani, G.
  • Journal Title: The Astrophysical Journal Letters Volume: 812 Pages: id.L23
  • DOI: 10.1088/2041-8205/812/2/L23
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Physical conditions of the interstellar medium in star-forming galaxies at z~1.5 (2015)
  • Author(s): Hayashi, Masao; Ly, Chun; Shimasaku, Kazuhiro; Motohara, Kentaro; Malkan, Matthew A.; Nagao, Tohru; Kashikawa, Nobunari; Goto, Ryosuke; Naito, Yoshiaki
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 67 Pages: id.80
  • DOI: 10.1093/pasj/psv041
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Hyper-luminous dust-obscured galaxies discovered by the Hyper Suprime-Cam on Subaru and WISE (2015)
  • Author(s): Toba, Y.; Nagao, T.; Strauss, M. A.; Aoki, K.; Goto, T.; Imanishi, M.; Kawaguchi, T.; Terashima, Y.; Ueda, Y.; Bosch, J.; Bundy, K.; Doi, Y.; Inami, H.; Komiyama, Y.; Lupton, R. H.; Matsuhara, H.; Matsuoka, Y.; Miyazaki, S.; Morokuma, T.; Nakata, F.; Oi, N.; Onoue, M.; Oyabu, S.; Price, P.l; Tait, P. J.; et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 67 Pages: id.86
  • DOI: 10.1093/pasj/psv057
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Rest-frame UV Single-epoch Black Hole Mass Estimates of Low-luminosity AGNs at Intermediate Redshifts (2015)
  • Author(s): Karouzos, Marios; Woo, Jong-Hak; Matsuoka, Kenta; Kochanek, Christopher S.; Onken, Christopher A.; Kollmeier, Juna A.; Park, Dawoo; Nagao, Tohru; Kim, Sang Chul
  • Journal Title: The Astrophysical Journal Volume: 815 Pages: id.128
  • DOI: 10.1088/0004-637X/815/2/128
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The Subaru COSMOS 20: Subaru optical imaging of the HST COSMOS field with 20 filters (2015)
  • Author(s): Taniguchi, Y.; Kajisawa, M.; Kobayashi, M. A. R.; Shioya, Y.; Nagao, T.; Capak, P. L.; Aussel, H.; Ichikawa, A.; Murayama, T.; Scoville, N. Z.; Ilbert, O.; Salvato, M.; Sanders, D. B.; Mobasher, B.; Miyazaki, S.; Komiyama, Y.; Le Fevre, O.; Tasca, L.; Lilly, S.; et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 67 Pages: id.104
  • DOI: 10.1093/pasj/psv106
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] HSCサーベイの現状と SWANS アップデート (2016)
  • Author(s): 長尾透
  • Organizer: SWANS理論班検討会
  • Place of Presentation: 東京理科大学長万部キャンパス（北海道長万部町）
  • Year and Date: 2016-03-25 – 2016-03-26
• [Presentation] Subaru Wide-Field AGN Survey with HSC (2016)
  • Author(s): Nagao, T.
  • Organizer: International Conference "From Stellar Evolution to Galaxy Formation"
  • Place of Presentation: 八ヶ岳高原ロッジ（長野県南牧村）
  • Year and Date: 2016-03-07 – 2016-03-09
  • Int'l Joint Research / Invited
• [Presentation] Synergetic studies with Subaru and SPICA (2016)
  • Author(s): Nagao, T.
  • Organizer: Subaru Users' Meeting FY2015
  • Place of Presentation: KKRホテル熱海（静岡県熱海市）
  • Year and Date: 2016-01-19 – 2016-01-21
  • Int'l Joint Research
• [Presentation] Statistical Properties of Dust Obscured Galaxies discovered by HSC, VIKING, and WISE (2016)
  • Author(s): Toba, Y., Nagao, T., Strauss, M., Aoki, K., Goto, T., Imanishi, M., Kawguchi, T., Terashima, Y., Ueda, Y., the HSC-DOGs team
  • Organizer: Subaru Users' Meeting FY2015
  • Place of Presentation: KKRホテル熱海（静岡県熱海市）
  • Year and Date: 2016-01-19 – 2016-01-21
  • Int'l Joint Research
• [Presentation] Spectroscopic search for low-metallicity AGNs through optical emission-line diagnostics (2016)
  • Author(s): Kawasaki, K., Nagao, T., Yoshiki, T., Terao, K.
  • Organizer: Subaru Users' Meeting FY2015
  • Place of Presentation: KKRホテル熱海（静岡県熱海市）
  • Year and Date: 2016-01-19 – 2016-01-21
  • Int'l Joint Research
• [Presentation] Clustering properties of IR-bright DOGs discovered by HSC, VIKING, and WISE (2016)
  • Author(s): Toba, Y., Nagao, T., Kajisawa, M., Matsuoka, Y.,
  • Organizer: HSC collaboration meeting 2016
  • Place of Presentation: 台湾中央研究院（台北、台湾）
  • Year and Date: 2016-01-12 – 2016-01-15
  • Int'l Joint Research
• [Presentation] Optical views of dense gas clouds at the circumnuclear region in AGNs (2015)
  • Author(s): 長尾透
  • Organizer: 国立天文台ALMAワークショップ「AGN銀河の中心1kpc→1pcスケールでの 質量降着機構の理解に向けて」
  • Place of Presentation: 国立天文台三鷹（東京都三鷹市）
  • Year and Date: 2015-12-21 – 2015-12-22
  • Invited
• [Presentation] Progress report and future plan of studies on Dust Obscured Galaxies (2015)
  • Author(s): Toba, Y., Nagao, T., Strauss, M. A., Aoki, K., Goto, T., Imanishi, M., Kawaguchi, T., Terashima, Y., Ueda, Y., and the HSC-DOGs team
  • Organizer: 国立天文台研究集会 "Understanding the evolution of quasars: Collaboration between theoretical models and initial HSC survey"
  • Place of Presentation: 鹿児島大学（鹿児島県鹿児島市）
  • Year and Date: 2015-12-01 – 2015-12-03
  • Int'l Joint Research
• [Presentation] PFS search for low-metallicity AGNs (2015)
  • Author(s): 長尾透
  • Organizer: PFS戦略枠観測AGN探査検討会
  • Place of Presentation: 国立天文台三鷹（東京都三鷹市）
  • Year and Date: 2015-10-27 – 2015-10-27
• [Presentation] Subaru Wide-Field AGN Survey: HSC-AGN and PFS-AGN (2015)
  • Author(s): 長尾透
  • Organizer: SWANS理論班検討会
  • Place of Presentation: 東北大学（宮城県仙台市）
  • Year and Date: 2015-09-28 – 2015-09-29
• [Presentation] WISE と SDSS を併用した Extreme IR Luminous Dust Obscured Galaxies 探査 (2015)
  • Author(s): 鳥羽儀樹, 長尾透
  • Organizer: 日本天文学会2015年秋季年会
  • Place of Presentation: 甲南大学（兵庫県神戸市）
  • Year and Date: 2015-09-09 – 2015-09-11
• [Presentation] 可視光輝線診断による低金属量 AGN 探査 (2015)
  • Author(s): 川崎光太, 長尾透, 鳥羽儀樹
  • Organizer: 日本天文学会2015年秋季年会
  • Place of Presentation: 甲南大学（兵庫県神戸市）
  • Year and Date: 2015-09-09 – 2015-09-11
• [Presentation] Subaru-Keck Synergetic AGN Studies (2015)
  • Author(s): Nagao, T.
  • Organizer: Subaru-Keck Synergy Workshop
  • Place of Presentation: 東北大学（宮城県仙台市）
  • Year and Date: 2015-09-01 – 2015-09-02
  • Int'l Joint Research
• [Presentation] Hyper-luminous Dust Obscured Galaxies discovered by the Hyper Suprime-Cam on Subaru and WISE (2015)
  • Author(s): Toba, Y., Nagao, T., Strauss, M. A., Aoki, K., Goto, T., Imanishi, M., Kawaguchi, T., Terashima, Y., Ueda, Y., the HSC-DOGs team
  • Organizer: HSC collaboration meeting 2015
  • Place of Presentation: Princeton University（プリンストン、USA）
  • Year and Date: 2015-07-27 – 2015-07-29
  • Int'l Joint Research
• [Presentation] Subaru Wide-Field AGN Surveys (SWANS) (2015)
  • Author(s): Nagao, T.
  • Organizer: East-Asia AGN Workshop 2015
  • Place of Presentation: Sheraton Changchun Jingyuetan Hotel（長春、中国）
  • Year and Date: 2015-07-14 – 2015-07-16
  • Int'l Joint Research
• [Presentation] Hyper-luminous Dust Obscured Galaxies discovered by the Hyper Suprime-Cam on Subaru and WISE (2015)
  • Author(s): Toba, Y., Nagao, T., Strauss, M. A., Aoki, K., Goto, T., Imanishi, M., Kawaguchi, T., Terashima, Y., Ueda, Y., the HSC-DOGs team
  • Organizer: East-Asia AGN Workshop 2015
  • Place of Presentation: Sheraton Changchun Jingyuetan Hotel（長春、中国）
  • Year and Date: 2015-07-14 – 2015-07-16
  • Int'l Joint Research
• [Presentation] PFSによる輝線診断で切り拓く銀河と活動銀河核のサイエンス (2015)
  • Author(s): 長尾透
  • Organizer: すばるPFSによるサイエンス検討会
  • Place of Presentation: 国立天文台三鷹（東京都三鷹市）
  • Year and Date: 2015-07-09 – 2015-07-11
  • Invited
• [Presentation] Fine-structure Lines for Studying the Evolution of Galaxies and SMBHs at High-redshift (2015)
  • Author(s): Nagao, T.
  • Organizer: Far-infrared Fine-structure Line Workshop
  • Place of Presentation: Max Planck Institute for Astronomy（ハイデルベルク、ドイツ）
  • Year and Date: 2015-06-08 – 2015-06-11
  • Int'l Joint Research / Invited
• [Presentation] Low-metallicity Active Galactic Nuclei: Expectations for the PFS Survey (2015)
  • Author(s): 長尾透
  • Organizer: 活動銀河核ワークショップ2015「すばるPFSの登場に向けて」
  • Place of Presentation: 国立天文台三鷹（東京都三鷹市）
  • Year and Date: 2015-05-18 – 2015-05-19
• [Presentation] Diagnosing the Inter-stellar Matter in Active Galactic Nuclei (2015)
  • Author(s): 長尾透
  • Organizer: GALSHOP「系外ISM研究会」
  • Place of Presentation: 国立天文台三鷹（東京都三鷹市）
  • Year and Date: 2015-05-11 – 2015-05-12
• [Funded Workshop] 国際研究会「Understanding Evolution of Quasars: Collaboration between Theoretical Models and Initial HSC Survey Data」 (2015)
  • Place of Presentation: 鹿児島大学
  • Year and Date: 2015-12-01 – 2015-12-03
• [Funded Workshop] 国際研究会「East-Asia AGN Workshop 2015」 (2015)
  • Place of Presentation: Changchun, China
  • Year and Date: 2015-07-14 – 2015-07-16