Molecular gas in high redshift star-forming galaxies with ALMA

• Project Area: Why does the Universe accelerate? - Exhaustive study and challenge for the future -
• Project/Area Number: 18H04346
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Research Institution: The University of Tokyo
• Principal Investigator: SILVERMAN John 東京大学, カブリ数物連携宇宙研究機構, 准教授 (90573030)
• Project Period (FY): 2018-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000); Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: submillimeter / star formation / high redshift / starbursts / galaxies / molecular gas / mergers / High-redshift galaxies / ALMA / Starbursts

Outline of Annual Research Achievements

Our effort has focused on the ALPINE large ALMA projects to study the molecular gas and dust properties of 118 typical star-forming galaxies at redshifts of 4 to 6. The data has been fully analyzed, three papers have been published and nine have been submitted for publication. Our main research contribution has been a study led by Seiji Fujimoto and myself to measure the sizes of the CO emission. This paper was submitted in FY2019 and has now been accepted by The Astrophysical Journal in May 2020. This work finds the size of the CO-emitting region to be larger than the stellar light distribution on all mass scales. Furthermore, there are a sizable number of sources with an additional CO component that reaches out to 10 kpc scales. While this was seen in ensemble averages, the frequency of such extended components for individual galaxies had not been previously known. This work places important constraints on the role of both galaxy-wide feedback and possibly the inflow of gas onto galaxies. Additional significant achievements have been the measure of the molecular gas fraction and its relation to the star formation efficiency as reported in Dessauges-Zavadsky, M et al. (submitted), the presence of outflows (Ginolfi et al. 2019) and the identification of a triple merger system at redshift of z = 4.57. Furthermore, studies on the dust properties, far-infrared star formation rate indicators and cosmic star formation rate density have been submitted. As a result, the ALPINE project has reached a high level of maturity over the past year and will continue to do so.

Research Progress Status

令和元年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和元年度が最終年度であるため、記入しない。

Research Products

• [Int'l Joint Research] Geneva Observatory(スイス)
• [Int'l Joint Research] University of Cambridge(英国)
• [Int'l Joint Research] Laboratory of Astrophysics, Marseille/CEA Saclay(フランス)
• [Int'l Joint Research] California Institute of Technology(米国)
• [Int'l Joint Research] CEA-Saclay(フランス)
• [Int'l Joint Research] Laboratoire d' Astrophysique Marseille(フランス)
• [Journal Article] The ALPINE-ALMA [C II] survey: Star-formation-driven outflows and circumgalactic enrichment in the early Universe (2020)
  • Author(s): Ginolfi M.、Jones G. C.、Bethermin M.、Fudamoto Y.、Loiacono F.、Fujimoto S.、Le Fevre O.、Faisst A.、Schaerer D.、Cassata P.、Silverman J. D.、Yan L.、Capak P. et al.
  • Journal Title: Astronomy & Astrophysics Volume: 633 Pages: A90-A90
  • DOI: 10.1051/0004-6361/201936872
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The ALPINE ALMA [C II] Survey: Multiwavelength Ancillary Data and Basic Physical Measurements (2020)
  • Author(s): Faisst A. L.、Schaerer D.、Lemaux B. C.、Oesch P. A.、Fudamoto Y.、Cassata P.、Bethermin M.、Capak P. L.、Le Fevre O.、Silverman J. D.、Yan L. et al.
  • Journal Title: The Astrophysical Journal Supplement Series Volume: 247 Issue: 2 Pages: 61-61
  • DOI: 10.3847/1538-4365/ab7ccd
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The ALPINE-ALMA [CII] Survey: Size of Individual Star-Forming Galaxies at z=4-6 and their Extended Halo Structure (2020)
  • Author(s): Fujimoto S.、Silverman J. D.、 Bethermin, M.、Ginolfi, M.、Jones, G. C.、Le Fevre, O.、Dessauges-Zavadsky, M.、Rujopakarn, W.、Faisst, A. L.、Fudamoto, Y.、Cassata, P.、Morselli, L.、Maiolino, R.、Schaerer, D.、Capak, P.、Yan, L.. et al.
  • Journal Title: The Astrophysical Journal Volume: -
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The ALPINE-ALMA [C II] survey: a triple merger at z = 4.56 (2019)
  • Author(s): Jones G C、Bethermin M、Fudamoto Y、Ginolfi M、Capak P、Cassata P、Faisst A、Le Fevre O、Schaerer D、Silverman J D、Yan L. et al.
  • Journal Title: Monthly Notices of the Royal Astronomical Society: Letters Volume: 491 Issue: 1 Pages: L18-L23
  • DOI: 10.1093/mnrasl/slz154
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The Molecular Gas Content and Fuel Efficiency of Starbursts at z ~ 1.6 with ALMA (2018)
  • Author(s): Silverman J. D.、Rujopakarn W.、Daddi E.、Renzini A.、Rodighiero G.、Liu D.、Puglisi A.、Sargent M.、Mancini C.、Kartaltepe J.、Kashino D.、Koekemoer A.、Arimoto N.、Bethermin M.、Jin S.、Magdis G.、Nagao T.、Onodera M.、Sanders D.、Valentino F.
  • Journal Title: The Astrophysical Journal Volume: 867 Issue: 2 Pages: 92-92
  • DOI: 10.3847/1538-4357/aae25e
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Concurrent Starbursts in Molecular Gas Disks within a Pair of Colliding Galaxies at z = 1.52 (2018)
  • Author(s): Silverman J. D.、Daddi E.、Rujopakarn W.、Renzini A.、Mancini C.、Bournaud F.、Puglisi A.、Rodighiero G.、Liu D.、Sargent M.、Arimoto N.、Bethermin M.、Fensch J.、Hayward C. C.、Kartaltepe J.、Kashino D.、Koekemoer A.、Magdis G.、McCracken H. J.、Nagao T.、Sheth K.、Smolcic V.、Valentino F.
  • Journal Title: The Astrophysical Journal Volume: 868 Issue: 1 Pages: 75-75
  • DOI: 10.3847/1538-4357/aae64b
  • Peer Reviewed / Int'l Joint Research
• [Presentation] High-resolution mapping of molecular gas in starburst galaxies at z~1.6 with ALMA (2019)
  • Author(s): John Silverman
  • Organizer: Annual Society of Japan meeting
• [Presentation] First Identification of 10-kpc Scale [CII] 158um Halos around Star-Forming Galaxies at z=5-7 (2019)
  • Author(s): Seiji Fujimoto
  • Organizer: Subaru Telescope 20th Anniversary
• [Remarks] A2C2S: The ALMA ALPINE [CII] Survey
  • URL: https://cesam.lam.fr/a2c2s/