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        Galaxy Zoo: CANDELS barred discs and bar fractions

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        Author
        Simmons, Brooke D.
        Melvin, Thomas
        Lintott, Chris J.
        Masters, Karen L.
        Willett, Kyle W.
        Keel, William C.
        Smethurst, R. J.
        Cheung, Edmond
        Nichol, Robert C.
        Schawinski, Kevin
        Rutkowski, Michael
        Kartaltepe, Jeyhan S.
        Bell, Eric F.
        Casteels, Kevin R. V.
        Conselice, Christopher J.
        Almaini, Omar
        Ferguson, Henry C.
        Fortson, Lucy
        Hartley, William
        Kocevski, Dale
        Koekemoer, Anton M.
        McIntosh, Daniel H.
        Mortlock, Alice
        Newman, Jeffrey A.
        Ownsworth, Jamie
        Bamford, Steven P.
        Dahlen, Tomas
        Faber, Sandra M.
        Finkelstein, Steven L.
        Fontana, Adriano
        Galametz, Audrey
        Grogin, N. A.
        Grützbauch, Ruth
        Guo, Yicheng
        Häußler, Boris
        Jek, Kian J.
        Kaviraj, Sugata
        Lucas, Ray A.
        Peth, Michael
        Salvato, Mara
        Wiklind, Tommy
        Wuyts, Stijn
        Attention
        2299/16423
        Abstract
        The formation of bars in disc galaxies is a tracer of the dynamical maturity of the population. Previous studies have found that the incidence of bars in discs decreases from the local Universe to z ~ 1, and by z > 1 simulations predict that bar features in dynamically mature discs should be extremely rare. Here, we report the discovery of strong barred structures in massive disc galaxies at z ~ 1.5 in deep rest-frame optical images from the Cosmic Assembly Near-Infrared Deep Extragalactic Legacy Survey. From within a sample of 876 disc galaxies identified by visual classification in Galaxy Zoo, we identify 123 barred galaxies. Selecting a subsample within the same region of the evolving galaxy luminosity function (brighter than L*), we find that the bar fraction across the redshift range 0.5 ≤ z ≤ 2 (fbar = 10.7+6.3 -3.5 per cent after correcting for incompleteness) does not significantly evolve.We discuss the implications of this discovery in the context of existing simulations and our current understanding of the way disc galaxies have evolved over the last 11 billion years
        Publication date
        2014-12-21
        Published in
        Monthly Notices of the Royal Astronomical Society
        Published version
        https://doi.org/10.1093/mnras/stu1817
        Other links
        http://hdl.handle.net/2299/16423
        Metadata
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