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Molecular gas content in typical L* galaxies at z ∼ 1.5 − 3

Dessauges-Zavadsky, Miroslava ; Zamojski, Michel ; Schaerer, Daniel ; Combes, Françoise ; Egami, Eiichi ; Swinbank, A. Mark ; Richard, Johan ; Sklias, Panos ; Rawle, Tim D. ; Kneib, Jean-Paul ; Boone, Frédéric ; Blain, Andrew

In: Proceedings of the International Astronomical Union, 2014, vol. 10, no. S309, p. 285-286

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    Titre
    • Molecular gas content in typical L* galaxies at z ∼ 1.5 − 3
    Auteur
    • Dessauges-Zavadsky, Miroslava. Observatoire de Genève, Université de Genève, 51 Ch. des Maillettes, 1290 Versoix, Switzerland email: miroslava.dessauges@unige.ch
    • Zamojski, Michel. Observatoire de Genève, Université de Genève, 51 Ch. des Maillettes, 1290 Versoix, Switzerland email: miroslava.dessauges@unige.ch
    • Schaerer, Daniel. Observatoire de Genève, Université de Genève, 51 Ch. des Maillettes, 1290 Versoix, Switzerland email: miroslava.dessauges@unige.ch
    • Combes, Françoise. Observatoire de Paris, LERMA, 61 Avenue de l'Observatoire, 75014 Paris, France
    • Egami, Eiichi. Steward Observatory, University of Arizona 933 North Cherry Avenue, Tucson, AZ 85721, USA
    • Swinbank, A. Mark. Institute for Computational Cosmology, Durham University, South Road, Durham DH1 3LE, UK
    • Richard, Johan. CRAL, Observatoire de Lyon, Université Lyon 1, 9 Avenue Ch. André, 69561 Saint Genis Laval Cedex, France
    • Sklias, Panos. Observatoire de Genève, Université de Genève, 51 Ch. des Maillettes, 1290 Versoix, Switzerland email: miroslava.dessauges@unige.ch
    • Rawle, Tim D.. ESAC, ESA, PO Box 78, Villanueva de la Canada, 28691 Madrid, Spain
    • Kneib, Jean-Paul. Laboratoire d'Astrophysique, Ecole Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, 1290 Versoix, Switzerland
    • Boone, Frédéric. CNRS, IRAP, 14 Avenue E. Belin, 31400 Toulouse, France
    • Blain, Andrew. Department of Physics & Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UK
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Proceedings of the International Astronomical Union, 2014, vol. 10, no. S309, p. 285-286. Cambridge University Press
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:304681
    Summary
    To extend the molecular gas measurements to typical L* star-forming galaxies (SFGs) at z ∼ 1.5 − 3, we have observed CO emission for five strongly-lensed galaxies selected from the Herschel Lensing Survey. The combined sample of our L* SFGs with CO-detected SFGs at z >1 from the literature shows a large spread in star formation efficiency (SFE). We find that this spread in SFE is due to variations of several physical parameters, primarily the specific star formation rate, but also stellar mass and redshift. An increase of the molecular gas fraction (f gas) is observed from z ∼ 0.2 to z ∼ 1.2, followed by a quasi non-evolution toward higher redshifts, as found in earlier studies. We provide the first measure of f gas of z >1 SFGs at the low-stellar mass end between 109.4 < M∗/M⊙ < 109.9, which shows a clear f gas upturn