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2015 年度 実施状況報告書

The FMOS-COSMOS survey of star-forming galaxies at z~1.6 using Subaru/FMOS

研究課題

研究課題/領域番号 26400221
研究機関東京大学

研究代表者

SILVERMAN John  東京大学, カブリ数物連携宇宙研究機構, 特任助教 (90573030)

研究期間 (年度) 2014-04-01 – 2017-03-31
キーワードInterstellar medium / star formation / galaxy evolution
研究実績の概要

Our first science question, “What regulates star formation?” has been the focus of three scientific papers published in FY15 (Silverman et al. 2015a,b; Kartaltepe et al. 2015). The first uses ALMA data to establish that high-z starburst galaxies form stars with high efficiency; this work was published in The Astrophysical Journal Letters and recognized by a press release by ALMA, and NAOJ. The second paper (Silverman et al. 2015b) presents the overall design, observational results, and first release of data products. We provided to the community higher level data products including catalogs of measurements for about 1000 star-forming galaxies. The spectroscopic redshifts are being used to train photometric redshift estimates for both the COSMOS field (Laigle et al. 2015 in press).

Significant progress has been achieved for the final acquisition of data and analysis of observations carried out with the Subaru. JSPS funds were used to support travel to work with collaborators at the COSMOS meeting (Helsinki), IAU General Assembly, Padova, Italy (Host: Dr. Alvio Renzini), and Dr. Emanuele Daddi (CEA-Saclay).

Also, we have submitted a paper to The Astrophysical Journal (Kashino et al.) on the emission line properties including chemical enrichment, ionization state, and gas pressure thus completing the FY15 science goal “II. A study on the ionization state of the ISM in galaxies at z~1.6.”. In addition, significant progress has been made in the analysis of the clustering of star-forming galaxies to address the question “Does the star formation rate depend on environment?”

現在までの達成度 (区分)
現在までの達成度 (区分)

2: おおむね順調に進展している

理由

The level of attainment met in FY15 is best described by category ‘2’. This is due to facts that include the following: (1) three scientific papers have been accepted to leading peer-reviewed journals, (2) additional and final data acquisition with Subaru Telescope has completed the observations to be taken through the second and third Subaru Intensive programs (PI Silverman - S15A-134I; S16A-054I), (3) completion of high-level data products including spectra and catalogs now available to the public, (4) scientific results have been presented at major international meetings, (5) additional VLT observations through CEA-Saclay (PI Stephanie Juneau) have been acquired, and (6) the award of a new ALMA program in Cycle 3.

今後の研究の推進方策

The research plan for FY2016 is the same as proposed for item V “Cold gas content and star formation efficiency of FMOS galaxies with ALMA”. In addition, we plan to investigate the impact of AGN on the Halpha emission line profiles. We also plan to expand upon the science goal “II. A study on the ionization state of the ISM in galaxies at z~1.6” by focusing such studies to the massive galaxies that were previously underrepresented but now have substantial numbers due to our continuing observational campaign that ends in April 2016. For the massive galaxies, we can further elucidate the physical reasons that high redshift galaxies are offset in standard emission line diagrams based on the ratios of [NII]/Halpha and [OIII]/Hbeta. To aid, we have acquired optical spectroscopy with Keck, and new data from VLT/VIMOS, to detect the [OII] emission line that enables us to break the degeneracy between metallicity and ionisation parameter.

  • 研究成果

    (11件)

すべて 2015 その他

すべて 国際共同研究 (3件) 雑誌論文 (3件) (うち国際共著 3件、 査読あり 3件、 謝辞記載あり 1件) 学会発表 (5件) (うち国際学会 4件、 招待講演 3件)

  • [国際共同研究] University of Hawaii/Rochester Institute of Technology(米国)

    • 国名
      米国
    • 外国機関名
      University of Hawaii/Rochester Institute of Technology
  • [国際共同研究] CEA-Saclay(France)

    • 国名
      フランス
    • 外国機関名
      CEA-Saclay
  • [国際共同研究] Astronomical Observatory of Padova(Italy)

    • 国名
      イタリア
    • 外国機関名
      Astronomical Observatory of Padova
  • [雑誌論文] A higher efficiency of converting gas to stars push galaxies at z~1.6 well above the star-forming main sequence2015

    • 著者名/発表者名
      J. D. Silverman, E. Daddi, G. Rodighiero, W. Rujopakarn, M. Sargent, A. Renzini, D. Liu, C. Feruglio, D. Kashino, D. Sanders, J. Kartaltepe, T. Nagao, N. Arimoto, S. Berta, M. Bethermin, A. Koekemoer, D. Lutz, G. Magdis, C. Mancini, M. Onodera, and G. Zamorani
    • 雑誌名

      The Astrophysical Journal Letters

      巻: Volume 812, Number 2 ページ: 23-30

    • DOI

      10.1088/2041-8205/812/2/L23

    • 査読あり / 国際共著
  • [雑誌論文] The FMOS-COSMOS survey of star-forming galaxies at z~1.6 III. Survey design, performance and sample characteristics2015

    • 著者名/発表者名
      J. D. Silverman, D. Kashino, D. Sanders, J. S. Kartaltepe, N. Arimoto, A. Renzini, G. Rodighiero, E. Daddi, J. Zahid, T. Nagao, L. J. Kewley, S. J. Lilly, N. Sugiyama, I. Baronchelli, P. Capak, C. M. Carollo, J. Chu, G. Hasinger, O. Ilbert, S. Juneau, M. Kajisawa, A. M. Koekemoer, K. Kovac, O. Le Fevre, et al.
    • 雑誌名

      The Astrophysical Journal Supplement Series

      巻: Volume 220, Number 1 ページ: 12-36

    • DOI

      10.1088/0067-0049/220/1/12

    • 査読あり / 国際共著 / 謝辞記載あり
  • [雑誌論文] Rest-frame Optical Emission Lines in Far-Infrared Selected Galaxies at z<1.7 from the FMOS-COSMOS Survey2015

    • 著者名/発表者名
      Jeyhan S. Kartaltepe, D. B. Sanders, J. D. Silverman, D. Kashino, J. Chu, H. Zahid, G. Hasinger, L. Kewley, K. Matsuoka, T. Nagao, L. Riguccini, M. Salvato, K. Schawinski, Y. Taniguchi, E. Treister, P. Capak, E. Daddi, and K. Ohta
    • 雑誌名

      The Astrophysical Journal Letters

      巻: Volume 806, Number 2 ページ: 35-41

    • DOI

      10.1088/2041-8205/806/2/L35

    • 査読あり / 国際共著
  • [学会発表] Rest-frame optical emission line properties of high-z galaxies in different environments2015

    • 著者名/発表者名
      John Silverman
    • 学会等名
      TAO SWIMS Team meeting
    • 発表場所
      NAOJ, Mitaka, Japan
    • 年月日
      2015-09-17 – 2015-09-17
    • 招待講演
  • [学会発表] Impact of galaxy mergers and interactions on triggering AGNs2015

    • 著者名/発表者名
      John Silverman
    • 学会等名
      Science Program IAU XXIX General Assembly
    • 発表場所
      Hawaii Convention Center, Honolulu, Hawaii
    • 年月日
      2015-08-06 – 2015-08-06
    • 国際学会
  • [学会発表] A higher efficiency of converting gas to stars in high-z starbursts2015

    • 著者名/発表者名
      John Silverman
    • 学会等名
      Star Formation Workshop 2015
    • 発表場所
      NAOJ, Mitaka, Japan
    • 年月日
      2015-06-29 – 2015-06-29
    • 国際学会 / 招待講演
  • [学会発表] Environmental influences on the growth of supermassive black holes2015

    • 著者名/発表者名
      John Silverman
    • 学会等名
      Let's group. The life cycle of galaxies in their favorite environment
    • 発表場所
      Max Planck for Astrophysics, Garching, Germany
    • 年月日
      2015-06-17 – 2015-06-17
    • 国際学会 / 招待講演
  • [学会発表] FMOS-COSMOS: a status report and ALMA followup2015

    • 著者名/発表者名
      John Silverman
    • 学会等名
      COSMOS meeting 2015
    • 発表場所
      Helsinki, Finland
    • 年月日
      2015-06-14 – 2015-06-14
    • 国際学会

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公開日: 2017-01-06   更新日: 2022-01-27  

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