宇宙進化を決定づける赤外線銀河のガス・ダストと星形成メカニズムの解明

2023 Fiscal Year Annual Research Report

• Project/Area Number: 19K23462
• Research Institution: Hiroshima University
• Principal Investigator: 稲見 華恵 広島大学, 宇宙科学センター, 助教 (20841943)
• Project Period (FY): 2019-08-30 – 2024-03-31
• Keywords: 銀河進化 / 銀河形成 / 赤外線 / 星形成 / 星間ガス / 星間ダスト

Outline of Annual Research Achievements

本年度は、ALMA望遠鏡だけでなくジェームズ・ウェッブ宇宙望遠鏡のデータも揃い、遠方宇宙および近傍宇宙の双方で赤外線銀河でのガスとダストの研究を推進することが出来た。
遠方銀河の赤外線銀河については、主にALMAを用い、銀河がもつダストの質量・温度を求め、星形成への制限をつけることが出来た。特に、本研究のターゲットとなった銀河は宇宙誕生から10億年程度の初期銀河であるが、これまで発見された遠方銀河のダスト温度よりも低温のダストを持つことを発見した。また、この銀河がもつ酸素ガスと炭素ガスからの輝線の光度比を調べたところ、これまでに発見された遠方銀河よりもガスの電離度が低かった。ダスト温度と合わせて考慮すると、宇宙誕生まもなくの銀河であるにも関わらず、それなりに進化した銀河が既に存在していたことが分かり、興味深い結果となった。
一方で、近傍赤外線銀河については、主にジェームズ・ウェッブ宇宙望遠鏡を使い、空間および波長方向を含む3次元データ補正を完了することが出来た。当初はパイプラインにバグがあったり、キャリブレーションが正確でなかったりしたが、パイプラインの改良により問題も解決した。本研究で観測した領域は、衝突銀河の衝突面でガスとダストが複雑に絡み合う場所であるために解析が困難な部分もあるが、スペクトル線を同定し、ガスの運動を反映した輝線フィットが順調に進んだ。特に、水素分子輝線を指標に銀河のエネルギー源からのアウトフローを探索し、それが星形成または巨大ブラックホールに起因するのかを調査した。

Research Products

• [Int'l Joint Research] California Institute of Technology/National Radio Astronomy Observatory/Space Telescope Science Institute(米国)
  • Country Name: U.S.A.
  • Counterpart Institution: California Institute of Technology/National Radio Astronomy Observatory/Space Telescope Science Institute
  • # of Other Institutions: 10
• [Int'l Joint Research] University of Crete(ギリシャ)
  • Country Name: GREECE
  • Counterpart Institution: University of Crete
• [Int'l Joint Research] ASTRO 3D/Monash University(オーストラリア)
  • Country Name: AUSTRALIA
  • Counterpart Institution: ASTRO 3D/Monash University
• [Int'l Joint Research] Leiden University(オランダ)
  • Country Name: NETHERLANDS
  • Counterpart Institution: Leiden University
• [Int'l Joint Research] Universitat de Barcelona(スペイン)
  • Country Name: SPAIN
  • Counterpart Institution: Universitat de Barcelona
• [Int'l Joint Research]
  • # of Other Countries: 2
• [Journal Article] Metal and dust evolution in ALMA REBELS galaxies: insights for future JWST observations (2024)
  • Author(s): Palla, De Looze, Relano, van der Giessen, Dayal, Ferrara, Schneider, Graziani, Algera, Aravena, Bowler, Hygate, Inami, van Leeuwen, Bouwens, Hodge, Smit, Stefanon, and van der Werf
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 528 Pages: 2407-2427
  • DOI: 10.1093/mnras/stae160
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The ALMA Reionization Era Bright Emission Line Survey: The molecular gas content of galaxies at z 7 (2024)
  • Author(s): Aravena, Heintz, Dessauges-Zavadsky, Oesch, Algera, Bouwens, da Cunha, Dayal, De Looze, Ferrara, Fudamoto, Gonzalez, Graziani, Hygate, Inami, Pallottini, Schneider, Schouws, Sommovigo, Topping, van der Werf, and Palla
  • Journal Title: Astronomy and Astrophysics Volume: 682 Pages: A24
  • DOI: 10.1051/0004-6361/202347281
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Cold dust and low [O III]/[C II] ratios: an evolved star-forming population at redshift 7 (2024)
  • Author(s): Algera, Inami, Sommovigo, Fudamoto, Schneider, Graziani, Dayal, Bouwens, Aravena, da Cunha, Ferrara, Hygate, van Leeuwen, De Looze, Palla, Pallottini, Smit, Stefanon, Topping, and van der Werf
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 527 Pages: 6867-6887
  • DOI: 10.1093/mnras/stad3111
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The ALMA REBELS survey: obscured star formation in massive Lyman-break galaxies at z= 4-8 revealed by the IRX-beta and M_star relations (2024)
  • Author(s): Bowler, Inami, Sommovigo, Smit, Algera, Aravena, Barrufet, Bouwens, da Cunha, Cullen, Dayal, De Looze, Dunlop, Fudamoto, Mauerhofer, McLure, Stefanon, Schneider, Ferrara, Graziani, Hodge, Nanayakkara, Palla, Schouws, Stark, and van der Werf
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 527 Pages: 5808-5828
  • DOI: 10.1093/mnras/stad3578
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] GOALS-JWST: Small Neutral Grains and Enhanced 3.3 um PAH Emission in the Seyfert Galaxy NGC 7469 (2023)
  • Author(s): Lai, Armus, Bianchin, Diaz-Santos, Linden, Privon, Inami, U, Bohn, Evans, Larson, Hensley, Smith, Malkan, Song, Stierwalt, van der Werf, McKinney, Aalto, Buiten, Rich, Charmandaris, Appleton, Barcos-Munoz, Boker, Finnerty, Kader, Law, Medling, Brown, Hayward, Howell, Iwasawa, Kemper, Marshall, Mazzarella, et al.
  • Journal Title: The Astrophysical Journal Volume: 957 Pages: L26
  • DOI: 10.3847/2041-8213/ad0387
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] JWST/NIRSpec Measurements of Extremely Low Metallicities in High Equivalent Width Ly-alpha Emitters (2023)
  • Author(s): Maseda, Lewis, Matthee, Hennawi, Boogaard, Feltre, Nanayakkara, Bacon, Barger, Brinchmann, Franx, Hashimoto, Inami, Kusakabe, Leclercq, Rowland, Taylor, Tremonti, Urrutia, Schaye, Simmonds, and Vitte
  • Journal Title: The Astrophysical Journal Volume: 956 Pages: 11
  • DOI: 10.3847/1538-4357/acf12b
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The IR Compactness of Dusty Galaxies Sets Star Formation and Dust Properties at z~0-2 (2023)
  • Author(s): McKinney, Pope, Kirkpatrick, Armus, Diaz-Santos, Gomez-Guijarro, Franco, Elbaz, Hayward, Inami, Popping, and Xiao
  • Journal Title: The Astrophysical Journal Volume: 955 Pages: 136
  • DOI: 10.3847/1538-4357/ace25c
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The ALMA REBELS Survey: discovery of a massive, highly star-forming, and morphologically complex ULIRG at z = 7.31 (2023)
  • Author(s): Hygate, Hodge, da Cunha, Rybak, Schouws, Inami, Stefanon, Graziani, Schneider, Dayal, Bouwens, Smit, Bowler, Endsley, Gonzalez, Oesch, Stark, Algera, Aravena, Barrufet, Ferrara, Fudamoto, Hilhorst, De Looze, Nanayakkara, Pallottini, Riechers, Sommovigo, Topping, and van der Werf
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 524 Pages: 1775-1795
  • DOI: 10.1093/mnras/stad1212
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The ALMA REBELS Survey: the first infrared luminosity function measurement at z~7 (2023)
  • Author(s): Barrufet, Oesch, Bouwens, Inami, Sommovigo, Algera, da Cunha, Aravena, Dayal, Ferrara, Fudamoto, Gonzalez, Graziani, Hygate, de Looze, Nanayakkara, Pallottini, Schneider, Stefanon, Topping, and van der Werf
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 522 Pages: 3926-3934
  • DOI: 10.1093/mnras/stad1259
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] GOODS-ALMA 2.0: Last gigayear star formation histories of the so-called starbursts within the main sequence (2023)
  • Author(s): Ciesla, Gomez-Guijarro, Buat, Elbaz, Jin, Bethermin, Daddi, Franco, Inami, Magdis, Magnelli, and Xiao
  • Journal Title: Astronomy and Astrophysics Volume: 672 Pages: A191
  • DOI: 10.1051/0004-6361/202245376
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The hidden side of cosmic star formation at z > 3. Bridging optically dark and Lyman-break galaxies with GOODS-ALMA (2023)
  • Author(s): Xiao, Elbaz, Gomez-Guijarro, Leroy, Bing, Daddi, Magnelli, Franco, Zhou, Dickinson, Wang, Rujopakarn, Magdis, Treister, Inami, Demarco, Sargent, Shu, Kartaltepe, Alexander, Bethermin, Bournaud, Ciesla, Ferguson, Finkelstein, Giavalisco, Gu, Iono, Juneau, Lagache, Leiton, Messias, Motohara, Mullaney, Nagar, et al.
  • Journal Title: Astronomy and Astrophysics Volume: 672 Pages: A18
  • DOI: 10.1051/0004-6361/202245100
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] Far-IR missions: panel discussion (2024)
  • Author(s): Hanae Inami
  • Organizer: Probing the Universe from far-infrared to millimeter wavelengths: future facilities and their synergies
  • Int'l Joint Research / Invited
• [Presentation] 赤外線観測を用いた銀河研究とTAOへの期待 (2024)
  • Author(s): 稲見華恵
  • Organizer: 日本天文学会 2024年春季学会
  • Invited
• [Presentation] Gas and Dust in Distant Galaxies Seen by ALMA (2023)
  • Author(s): Hanae Inami
  • Organizer: ALMA at 10 years: Past, Present, and Future
  • Int'l Joint Research / Invited
• [Presentation] FIR-Probe/PRIMAで期待されるサイエンス: 日本からのインプット (2023)
  • Author(s): 稲見華恵, 長尾透, 尾中敬, 橋本拓也, 武内勇司
  • Organizer: 光学赤外線天文連絡会シンポジウム
• [Presentation] Deficit of Fine Structure Line Emission and the Gas Heating Efficiency (2023)
  • Author(s): Hanae Inami
  • Organizer: Fine Structure Line Workshop
• [Presentation] AGN and its impact in the ISM in a local LIRG, NGC7469 (2023)
  • Author(s): Hanae Inami
  • Organizer: AGN x ALMA Mini Workshop
  • Int'l Joint Research
• [Presentation] ISM conditions of (dusty) star-forming galaxies at high redshift (2023)
  • Author(s): Hanae Inami
  • Organizer: PRIMA 2023 Community Workshop
  • Int'l Joint Research