The MUSEHubbleUltra Deep Field Survey

Astronomy and Astrophysics, vol. 654, pp. A49

Abstract

We investigate the specific angular momentum (sAM)j(<r) profiles of intermediate redshift (0.4 < z < 1.4) star-forming galaxies (SFGs) in the relatively unexplored regime of low masses (down toM⋆ ∼ 108 M⊙) and small sizes (down toRe ∼ 1.5 kpc), and we characterize the sAM scaling relation (i.e., Fall relation) and its redshift evolution. We have developed a 3D methodology to constrain sAM profiles of the star-forming gas using a forward modeling approach with GAlPAK3Dthat incorporates the effects of beam smearing, yielding the intrinsic morpho-kinematic properties even with limited spatial resolution data. Using mock observations from the TNG50 simulation, we find that our 3D methodology robustly recovers the star formation rate (SFR)-weightedj̃⋆(<r) profiles down to a low effective signal-to-noise ratio of ⪆3. We applied our methodology blindly to a sample of 494 [O II]-selected SFGs in the MUSE Ultra Deep Field (UDF) 9 arcmin2mosaic data, covering the unexplored 8 < logM⋆/M⊙< 9 mass range. We find that the (SFR-weighted) sAM relation followsj̃⋆∝M⋆αwith an indexαvarying fromα = 0.3 toα = 0.5, from logM⋆/M⊙= 8 to logM⋆/M⊙= 10.5. The UDF sample supports a redshift evolutionj̃⋆∝(1+z)a, witha= −0.27−0.56+0.42which is consistent with the (1 + z)−0.5expectation from a universe in expansion. The scatter of the sAM sequence is a strong function of the dynamical state with logj|M⋆∝ 0.65−0.08+0.06× log(Vmax/σ), whereσis the velocity dispersion at 2Re. In TNG50, SFGs also form aj̃⋆−M⋆−(V/σ) plane, but it correlates more with galaxy size than with morphological parameters. Our results suggest that SFGs might experience a dynamical transformation, and lose their sAM, before their morphological transformation to becoming passive via either merging or secular evolution.

Authors 17

1. N. Bouché

   Lyon 1 Université · École Normale Supérieure de Lyon · Centre National de la Recherche Scientifique · Centre de Recherche Astrophysique de Lyon

   Affiliation as printed

   Univ Lyon, Univ Lyon1, ENS de Lyon, CNRS, Centre de Recherche Astrophysique de Lyon (CRAL) UMR5574, 69230 Saint-Genis-Laval, France

2. Shy Genel

   Flatiron Institute · Columbia University

   Affiliation as printed

   Center for Computational Astrophysics, Flatiron Institute, 162 Fifth Avenue, New York, NY 10010, USA

   Columbia Astrophysics Laboratory, Columbia University, 550 West 120th Street, New York, NY 10027, USA

3. Alisson Pellissier

   Centre National de la Recherche Scientifique · Université Toulouse III - Paul Sabatier · Université Côte d'Azur · Lagrange Laboratory · Observatoire de la Côte d’Azur · Institut de Recherche en Astrophysique et Planétologie · Université de Toulouse

   Affiliation as printed

   Institut de Recherche en Astrophysique et Planétologie (IRAP), Université de Toulouse, CNRS, UPS, 31400 Toulouse, France

   Laboratoire Lagrange, Université Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Blvd de l’Observatoire, 06304 Nice cedex 4, France

   Laboratoire Lagrange, Université Côte d'Azur, Observatoire de la Côte d'Azur, CNRS, Blvd de l'Observatoire, 06304 Nice cedex 4, France

4. C. Dubois

   Centre National de la Recherche Scientifique · Université Toulouse III - Paul Sabatier · Institut de Recherche en Astrophysique et Planétologie · Université de Toulouse

   Affiliation as printed

   Institut de Recherche en Astrophysique et Planétologie (IRAP), Université de Toulouse, CNRS, UPS, 31400 Toulouse, France

5. T. Contini

   Centre National de la Recherche Scientifique · Université Toulouse III - Paul Sabatier · Institut de Recherche en Astrophysique et Planétologie · Université de Toulouse

   Affiliation as printed

   Institut de Recherche en Astrophysique et Planétologie (IRAP), Université de Toulouse, CNRS, UPS, 31400 Toulouse, France

6. B. Épinat

   Centre National de la Recherche Scientifique · Aix-Marseille Université

   Affiliation as printed

   Aix Marseille Univ, CNRS, CNES, LAM, Marseille, France

7. Annalisa Pillepich

   Max Planck Institute for Astronomy

   Affiliation as printed

   Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany

8. Davor Krajnović

   Leibniz Institute for Astrophysics Potsdam

   Affiliation as printed

   Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, 14482 Postdam, Germany

9. Dylan Nelson

   Heidelberg University

   Affiliation as printed

   Universität Heidelberg, Zentrum für Astronomie, Institut für theoretische Astrophysik, Albert-Ueberle-Str. 2, 69120 Heidelberg, Germany

10. Valentina Abril-Melgarejo

    Centre National de la Recherche Scientifique · Aix-Marseille Université

    Affiliation as printed

    Aix Marseille Univ, CNRS, CNES, LAM, Marseille, France

11. Johan Richard

    Lyon 1 Université · École Normale Supérieure de Lyon · Centre National de la Recherche Scientifique · Centre de Recherche Astrophysique de Lyon

    Affiliation as printed

    Univ Lyon, Univ Lyon1, ENS de Lyon, CNRS, Centre de Recherche Astrophysique de Lyon (CRAL) UMR5574, 69230 Saint-Genis-Laval, France

12. Leindert Boogaard Aachen Leiden Observatory

    Leiden University · Max Planck Institute for Astronomy · Leiden Observatory

    Affiliation as printed

    Leiden Observatory, Leiden University, PO Box 9513, 2300 RA Leiden, The Netherlands

    Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany

13. Michael V. Maseda Aachen Leiden Observatory

    Leiden University · University of Wisconsin–Madison · Leiden Observatory

    Affiliation as printed

    Department of Astronomy, University of Wisconsin-Madison, 475 N. Charter Street, Madison, WI 53706, USA

    Leiden Observatory, Leiden University, PO Box 9513, 2300 RA Leiden, The Netherlands

14. Wilfried Mercier

    Centre National de la Recherche Scientifique · Université Toulouse III - Paul Sabatier · Institut de Recherche en Astrophysique et Planétologie · Université de Toulouse

    Affiliation as printed

    Institut de Recherche en Astrophysique et Planétologie (IRAP), Université de Toulouse, CNRS, UPS, 31400 Toulouse, France

15. Roland M. Bacon

    Lyon 1 Université · École Normale Supérieure de Lyon · Centre National de la Recherche Scientifique · Centre de Recherche Astrophysique de Lyon

    Affiliation as printed

    Univ Lyon, Univ Lyon1, ENS de Lyon, CNRS, Centre de Recherche Astrophysique de Lyon (CRAL) UMR5574, 69230 Saint-Genis-Laval, France

16. Matthias Steinmetz

    Leibniz Institute for Astrophysics Potsdam

    Affiliation as printed

    Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, 14482 Postdam, Germany

17. Mark Vogelsberger

    Massachusetts Institute of Technology

    Affiliation as printed

    Department of Physics, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA