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  • Béthermin, MatthieuLaboratoire d'Astrophysique de Marseille (author)

The ALMA-ALPINE [CII] survey: Kennicutt-Schmidt relation in four massive main-sequence galaxies at z ~ 4.5

  • Article/chapterEnglish2023

Publisher, publication year, extent ...

  • 2023
  • electronicrdacarrier

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  • LIBRIS-ID:oai:research.chalmers.se:a03164e9-d2a9-4e81-b66e-f3f38714fb0f
  • https://research.chalmers.se/publication/539301URI
  • https://doi.org/10.1051/0004-6361/202348115DOI

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  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • Aims. The Kennicutt-Schmidt (KS) relation between the gas and the star formation rate (SFR) surface density (Σgas - ΣSFR) is essential to understand star formation processes in galaxies. To date, it has been measured up to z ~ 2.5 in main-sequence galaxies. In this Letter our aim is to put constraints at z ~ 4.5 using a sample of four massive main-sequence galaxies observed by ALMA at high resolution. Methods. We obtained ~0.3″-resolution [CII] and continuum maps of our objects, which we then converted into gas and obscured SFR surface density maps. In addition, we produced unobscured SFR surface density maps by convolving Hubble ancillary data in the rest-frame UV. We then derived the average ΣSFR in various Σgas bins, and estimated the uncertainties using a Monte Carlo sampling. Results. Our galaxy sample follows the KS relation measured in main-sequence galaxies at lower redshift, and is slightly lower than the predictions from simulations. Our data points probe the high end both in terms of Σgas and ΣSFR, and gas depletion timescales (285-843 Myr) remain similar to z ~ 2 objects. However, three of our objects are clearly morphologically disturbed, and we could have expected shorter gas depletion timescales (≲100 Myr) similar to merger-driven starbursts at lower redshifts. This suggests that the mechanisms triggering starbursts at high redshift may be different than in the low- and intermediate-z Universe.

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Added entries (persons, corporate bodies, meetings, titles ...)

  • Accard, C. (author)
  • Guillaume, C. (author)
  • Dessauges-Zavadsky, M.Université de Genève,University of Geneva (author)
  • Ibar, E.Universidad de Valparaíso,University of Valparaíso (author)
  • Cassata, P.Università Degli Studi di Padova,University of Padua,Istituto nazionale di astrofisica (INAF) (author)
  • Devereaux, T.Università Degli Studi di Padova,University of Padua,Istituto nazionale di astrofisica (INAF) (author)
  • Faisst, A.California Institute of Technology (Caltech) (author)
  • Freundlich, J. (author)
  • Jones, G. C.University Of Oxford (author)
  • Kraljic, K. (author)
  • Algera, H.National Astronomical Observatory of Japan,Hiroshima University (author)
  • Amorín, R. O.Consejo Nacional de Investigaciones Cientificas y Tecnicas,Universidad de La Serena,University of La Serena (author)
  • Bardelli, S.Istituto nazionale di astrofisica (INAF) (author)
  • Boquien, M. (author)
  • Buat, V.Laboratoire d'Astrophysique de Marseille (author)
  • Donghia, E.University of Wisconsin Madison (author)
  • Dubois, Y.Institut d 'Astrophysique de Paris (author)
  • Ferrara, AndreaScuola Normale Superiore di Pisa (author)
  • Fudamoto, YoshinobuChiba University (author)
  • Ginolfi, M.Osservatorio Astrofisico di Arcetri,Arcetri Astrophysical Observatory,Universita degli Studi di Firenze,University of Florence (author)
  • Guillard, P.Institut d 'Astrophysique de Paris (author)
  • Giavalisco, M.University of Massachusetts (author)
  • Gruppioni, C.Istituto nazionale di astrofisica (INAF) (author)
  • Gururajan, G.Istituto nazionale di astrofisica (INAF),Universita di Bologna,University of Bologna (author)
  • Hathi, N.Space Telescope Science Institute (STScI) (author)
  • Hayward, Christopher C.Flatiron Institute (author)
  • Koekemoer, Anton M.Space Telescope Science Institute (STScI) (author)
  • Lemaux, Brian C.University of California,Gemini Observatory North (author)
  • Magdis, Georgios E.Niels Bohr Institute,Danmarks Tekniske Universitet,Technical University of Denmark (author)
  • Molina Tobar, Juan Andrés,1991Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)juanan (author)
  • Narayanan, D.University of Florida (author)
  • Mayer, L.Universität Zürich,University of Zürich (author)
  • Pozzi, F.Istituto nazionale di astrofisica (INAF) (author)
  • Rizzo, F.Niels Bohr Institute (author)
  • Romano, M.Istituto nazionale di astrofisica (INAF) (author)
  • Tasca, L.Laboratoire d'Astrophysique de Marseille (author)
  • Theule, PatriceLaboratoire d'Astrophysique de Marseille (author)
  • Vergani, D.Istituto nazionale di astrofisica (INAF) (author)
  • Vallini, L.Istituto nazionale di astrofisica (INAF) (author)
  • Zamorani, G.Istituto nazionale di astrofisica (INAF) (author)
  • Zanella, A.Istituto nazionale di astrofisica (INAF) (author)
  • Zucca, E.Istituto nazionale di astrofisica (INAF) (author)
  • Laboratoire d'Astrophysique de MarseilleUniversité de Genève (creator_code:org_t)

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  • In:Astronomy and Astrophysics6800004-63611432-0746

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