自己組織化状態空間モデルによる宇宙マイクロ波背景放射前景放射分離法の研究

• Project Area: The Physical Origin of the Universe viewed through the Cosmic Background Radiation - from Cosmological Inflation to Dark Ages -
• Project/Area Number: 24111707
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: Nagoya University
• Principal Investigator: 竹内 努 名古屋大学, 理学(系)研究科(研究院), 准教授 (90436072)
• Project Period (FY): 2012-04-01 – 2014-03-31
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000); Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
• Keywords: 理論天文学 / 宇宙背景放射 / 前景放射 / 赤外銀河 / 電波銀河 / 状態空間モデル

Research Abstract

現代宇宙論はビッグバン宇宙論の骨子をほぼ確立し, ビッグバンに先行する急激な膨張期であるインフレーションの検証へと向かっている. インフレーション理論は第一原理から完全に決定することは難しく, 宇宙マイクロ波背景放射(CMB)の偏光のBモード成分を精密
に解析することによって初めてシナリオを絞り込むことができる. しかし, 現実的には銀河系や系外銀河などのCMBの前景放射が重なるため, CMBゆらぎの抽出は極めて困難である. CMBゆらぎの観測は飛躍的進歩を遂げたが, 観測精度の向上, 特に偏光ゆらぎの精密化
に伴って, CMBと前景成分を分離するための本質的に新しい統計的解析方法が必要になってきている. これが領域A04のメインテーマである。
本研究では、これまで天文学分野ではほとんど用いられていなかった自己組織化状態空間モデルという統計的方法を発展させ、Planck衛星のデータをCMBのゆらぎ、銀河系外前景放射、銀河系前景放射、ノイズの4成分に分解し、CMBゆらぎを精密に解析することで初期宇宙の情報を抽出する方法を構築する。前年度はまずこの状態空間モデルで用いる前景放射の各成分の統計的性質を明らかにするため、独立成分分析(ICA)を用いた成分分離法を確立し、分子輝線成分、連続波成分のパワースペクトルを求めた。この成果は学術論文として公表済みである。この統計的性質を仮定することで、状態空間の決定ができる。前年度末にPlanckのデータが公表され、本年度にかけて関連論文も出版されているが、現時点では前景放射の様々な不確定要素が決定していない状態である。このため、H25年度は不定性を含んだ状態で統計的推定を行う自由度を残した解析コードを準備した。新しい観測的制限がつき次第完成できる。
当初の目的は達成したと考えているが、新しい銀河系星間物質観測をインプットとし、Planck, BICEP2など次世代データへの応用を引き続き試みていく。

Current Status of Research Progress

Reason

25年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

25年度が最終年度であるため、記入しない。

Research Products

• [Journal Article] CO Component Estimation Based on the Independent Component Analysis (2014)
  • Author(s): Ichiki, Kiyotomo; Kaji, Ryohei; Yamamoto, Hiroaki; Takeuchi, Tsutomu T.; Fukui, Yasuo
  • Journal Title: The Astrophysical Journal Volume: 780 Issue: 1 Pages: 13-13
  • DOI: 10.1088/0004-637x/780/1/13
  • Peer Reviewed
• [Journal Article] Properties of star forming galaxies in AKARI Deep Field-South (2014)
  • Author(s): Małek, K.; Pollo, A.; Takeuchi, T. T.; Buat, V.; Burgarella, D.; Malkan, M.; Giovannoli, E.; Kurek, A.; Matsuura, S.
  • Journal Title: Astronomy & Astrophysics Volume: 562 Pages: A15-A15
  • DOI: 10.1051/0004-6361/201321665
  • Peer Reviewed / Open Access
• [Journal Article] Gas-to-dust mass ratios in local galaxies over a 2 dex metallicity range (2014)
  • Author(s): Rémy-Ruyer, A.; Madden, S. C.; Galliano, F.; Galametz, M.; Takeuchi, T. T.; Asano, R. S.; Zhukovska, S.; Lebouteiller, V.; Cormier, D.; Jones, A.; Bocchio, M.; Baes, M.; Bendo, G. J.; Boquien, M.; Boselli, A.; DeLooze, I.; Doublier-Pritchard, V.; Hughes, T.; Karczewski, O. Ł.; Spinoglio, L.
  • Journal Title: Astronomy & Astrophysics Volume: 563 Pages: A31-A31
  • DOI: 10.1051/0004-6361/201322803
  • Peer Reviewed
• [Journal Article] Dusty Universe viewed by AKARI far infrared detector (2013)
  • Author(s): Malek, K., et al.
  • Journal Title: Earth, Planets and Space Volume: 65 Issue: 10 Pages: 1101-1108
  • DOI: 10.5047/eps.2013.06.005
  • Peer Reviewed
• [Journal Article] Clustering of far-infrared galaxies in the AKARI All-Sky Survey North (2013)
  • Author(s): Pollo, A., Takeuchi, T. T., Solarz, A., Rybka, P., Suzuki, T. L., P&ecedil;piak, A., and Oyabu, S.
  • Journal Title: Earth, Planets, and Space Volume: 65 Issue: 10 Pages: 1109-1116
  • DOI: 10.5047/eps.2013.06.004
  • Peer Reviewed / Open Access
• [Journal Article] What determines the grain size distribution in galaxies? (2013)
  • Author(s): 浅野良輔
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: (印刷中)(in press) Issue: 1 Pages: 637-652
  • DOI: 10.1093/mnras/stt506
  • Peer Reviewed
• [Journal Article] Infrared Composition of Large Magellanic Cloud (2013)
  • Author(s): Siudek, M.
  • Journal Title: Earth, Planets Space Volume: 65 Pages: 229-271
  • Peer Reviewed
• [Journal Article] Clustering of Far-Infrared Galaxies in the AKARI All-Sky Survey (2013)
  • Author(s): Pollo, A.
  • Journal Title: Earth, Planets Space Volume: 65 Pages: 273-279
  • Peer Reviewed
• [Journal Article] Dust formation history of galaxies: A critical role of metallicity for the dust mass growth by accreting materials in the interstellar medium (2013)
  • Author(s): Asano, R. S.
  • Journal Title: Earth, Planets, Space Volume: 65 Pages: 213-222
  • Peer Reviewed
• [Journal Article] Far-Ultraviolet and Far-Infrared Bivariate Luminosity Function of Galaxies: Complex Relation between Stellar and Dust Emission (2013)
  • Author(s): Takeuchi, T. T.
  • Journal Title: Earth, Planets, Space Volume: 65 Pages: 281-290
  • Peer Reviewed
• [Journal Article] Star formation and dust extinction properties of local galaxies as seen from AKARI and GALEX (2013)
  • Author(s): Sakurai, A.
  • Journal Title: Earth, Planets Space Volume: 65 Pages: 203-211
  • Peer Reviewed
• [Journal Article] Overview of the North Ecliptic Pole Deep Multi-Wavelength Survey NEP-DEEP (2012)
  • Author(s): Matsuhara, H.
  • Journal Title: Publications of the Korean Astronomical Society Volume: 27 Pages: 123-125
  • Peer Reviewed
• [Journal Article] Infrared Spectral Energy Distribution of Galaxies in the Akari all Sky Survey: Correlations with Galaxy Properties and Their Physical Origin (2012)
  • Author(s): Makiya, R.
  • Journal Title: Publications of the Korean Astronomical Society Volume: 27 Pages: 325-326
  • Peer Reviewed
• [Journal Article] Infrared Composition of the Large Magellanic Cloud (2012)
  • Author(s): Siudek, M.
  • Journal Title: Publications of the Korean Astronomical Society Volume: 27 Pages: 223-224
  • Peer Reviewed
• [Journal Article] Radio Emission from AKARI Galaxies (2012)
  • Author(s): Pepiak, A.
  • Journal Title: Publications of the Korean Astronomical Society Volume: 27 Pages: 339-341
  • Peer Reviewed
• [Journal Article] Classification Schemes and Properties of Infrared Galaxies (2012)
  • Author(s): Rybka, P.
  • Journal Title: Publications of the Korean Astronomical Society Volume: 27 Pages: 293-294
  • Peer Reviewed
• [Journal Article] Multicolor Star-Galaxy Separation from the NIR and MIR Akari Data (2012)
  • Author(s): Solarz, A.
  • Journal Title: Publications of the Korean Astronomical Society Volume: 27 Pages: 151-152
  • Peer Reviewed
• [Journal Article] Angular Clustering of Fir-Selected Galaxies in the Akari All-Sky Survey (2012)
  • Author(s): Pollo, A.
  • Journal Title: Publications of the Korean Astronomical Society Volume: 27 Pages: 343-344
  • Peer Reviewed
• [Journal Article] Reexamination of the Infrared Excess-Ultraviolet Slope Relation of Local Galaxies (2012)
  • Author(s): Takeuchi, T. T.
  • Journal Title: The Astrophysical Journal Volume: 755 Pages: 144-144
  • Peer Reviewed
• [Journal Article] Akari-Sdss Surveys: Spectral Energy Distributions of Nearby Galaxies (2012)
  • Author(s): Buat, V.
  • Journal Title: Publications of the Korean Astronomical Society Volume: 27 Pages: 317-317
  • Peer Reviewed
• [Presentation] Clustering of 24 um selected galaxies in the AKARI NEP Deep Field (2014)
  • Author(s): A. Solarz, A. Pollo, T.T. Takeuchi
  • Organizer: Winter School; Cosmology with Wide-Field Surveys Saas Fee
  • Place of Presentation: Engelberg, Switzerland
• [Presentation] The Starburst-AGN Connection in Luminous and Ultraluminous Infrared Galaxies (2014)
  • Author(s): S. Fiorenza,T. T. Takeuchi, K. Malek, C. Liu
  • Organizer: American Astronomical Society, AAS Meeting #223,
  • Place of Presentation: New York, USA
• [Presentation] The Infrared Excess-UV spectral Slope Relation of Galaxies at 0 < z < 3 (2014)
  • Author(s): T. T. Takeuchi, A. T. Kawakita, K. Malek, T. L. Suzuki, A. K. Inoue, V. Buat, D. Burgarella, S. Noll
  • Organizer: The impact of galactic structure on star formation
  • Place of Presentation: Sapporo, Japan
• [Presentation] The spatially resolved star formation and as seen by multiwavelength observations (2014)
  • Author(s): N. Teruya, T. T. Takeuchi
  • Organizer: The impact of galactic structure on star formation
  • Place of Presentation: Sapporo, Japan
• [Presentation] 遠赤外線セレクト銀河の空間分布のパワースペクトル解析 (2014)
  • Author(s): 鈴木智子, 竹内努, Agnieszka Pollo, 大藪進喜
  • Organizer: 日本天文学会2014春季年会
  • Place of Presentation: 三鷹
• [Presentation] Topics on HI in the Context of Galaxy Evolution: Baryonic Tully Fisher Relation and its Extension (2013)
  • Author(s): Takeuchi, T. T.
  • Organizer: 銀河進化と遠方宇宙
  • Place of Presentation: コープイン京都
  • Year and Date: 2013-02-20
• [Presentation] Properties of FIR-bright ADF-S galaxies (2013)
  • Author(s): K. Małek, A. Pollo, T. T. Takeuchi, V. Buat, D. Burgarella, E. Giovannoli, M. Malkan, and A. Kurek
  • Organizer: A Panchromatic View of Galaxy Evolution
  • Place of Presentation: Paphos, Cyprus
• [Presentation] Ultra Luminous Infrared Galaxies in the AKARI deep fields (2013)
  • Author(s): A. Pollo, T. T. Takeuchi, V. Buat, D. Burgarella, E. Giovannoli, M. Malkan, and A. Kurek
  • Organizer: The 6th meeting on Cosmic Dust
  • Place of Presentation: Kobe, Japan
• [Presentation] The Infrared Excess-UV spectral Slope Relation of Galaxies and its Evolution at 0 < z < 3 (2013)
  • Author(s): T. T. Takeuchi
  • Organizer: The Life Cycle of Dust in the Universe: Observations, Theory, and Laboratory Experiments
  • Place of Presentation: Taipei, Taiwan
• [Presentation] The Infrared Excess-UV spectral Slope Relation of Galaxies at 0 < z < 3 (2013)
  • Author(s): T. T. Takeuchi, A. T. Kawakita, K. Malek, T. L. Suzuki, A. K. Inoue, V. Buat, D. Burgarella, S. Noll
  • Organizer: The 6th meeting on Cosmic Dust
  • Place of Presentation: Kobe, Japan
• [Presentation] Constructing the Spectral Energy Distribution Model of Galaxies Considering Dust Extinction and Re-emission (2013)
  • Author(s): A. T. Kawakita, T. T. Takeuchi
  • Organizer: The Life Cycle of Dust in the Universe: Observations, Theory, and Laboratory Experiments
  • Place of Presentation: Taipei, Taiwan
• [Presentation] Baryonic Tully-Fisher relation and star formation rate (2013)
  • Author(s): M. I. N. Kobayashi, T. T. Takeuchi
  • Organizer: The Life Cycle of Dust in the Universe: Observations, Theory, and Laboratory Experiments
  • Place of Presentation: Taipei, Taiwan
• [Presentation] AKARI全天カタログを用いた銀河分布のパワースペクトル解析 (2013)
  • Author(s): 鈴木智子, 竹内努, Agnieszka Pollo, 大藪進喜
  • Organizer: 日本天文学会2013秋季年会
  • Place of Presentation: 仙台
• [Presentation] The angular power spectrum analysis of far-infrared galaxies detected by AKARI (2013)
  • Author(s): T. L. Suzuki, T. T. Takeuchi, A. Pollo, S. Oyabu
  • Organizer: A Panchromatic View of Galaxy Evolution
  • Place of Presentation: Paphos, Cyprus
• [Presentation] How do the extinction curves in galaxies evolve? (2013)
  • Author(s): R. Asano, T. Takeuchi, H. Hirashita and T. Nozawa
  • Organizer: The Life Cycle of Dust in the Universe: Observations, Theory, and Laboratory Experiments
  • Place of Presentation: Taipei, Taiwan
• [Presentation] Star formation and dust extinction in major mergers from ultraviolet and infrared data (2012)
  • Author(s): Yuan F. T.
  • Organizer: The 5th meeting on Cosmic Dust
  • Place of Presentation: Center for Planetary Science
  • Year and Date: 2012-08-06
• [Presentation] Evolution of grain size distribution of galaxies (2012)
  • Author(s): Asano, R. S.
  • Organizer: The 5th meeting on Cosmic Dust
  • Place of Presentation: Center for Planetary Science
  • Year and Date: 2012-08-06
• [Presentation] Dust SED model of very young galaxies with AGB dust (2012)
  • Author(s): Takeuchi, T. T.
  • Organizer: The 5th meeting on Cosmic Dust
  • Place of Presentation: Center for Planetary Science
  • Year and Date: 2012-08-06
• [Presentation] The Self-Organizing State Space Model Approach for the CMB Foreground Subtraction (2012)
  • Author(s): Takeuchi, T. T.
  • Organizer: 宇宙創成の物理
  • Place of Presentation: KEK
  • Year and Date: 2012-07-11
  • Invited
• [Presentation] Investigation for new methods for the foreground removal of the CMB (2012)
  • Author(s): Takeuchi, T. T.
  • Organizer: 宇宙創成の物理
  • Place of Presentation: KEK
  • Year and Date: 2012-07-11
• [Presentation] Clustering in the AKARI NEP field (2012)
  • Author(s): Solarz, A.
  • Organizer: Multiawvelength surveys: a vintage decade
  • Place of Presentation: Hunter Valley, Australia
  • Year and Date: 2012-06-04
• [Book] 銀河-その構造と進化- (2013)
  • Author(s): 竹内 努
  • Total Pages: 397
  • Publisher: 日本評論社