Evolution and Impact of Bars over the Last Nine Gyr: Early Results from GEMS

  • Shardha Jogee
  • Fabio D. Barazza
  • Hans-Walter Rix
  • James Davies
  • Inge Heyer
  • Marco Barden
  • Steven V. W. Beckwith
  • Eric F. Bell
  • Andrea Borch
  • John A. R. Caldwell
  • Christopher Conselice
  • Boris Haussler
  • Catherine Heymans
  • Knud Jahnke
  • Johan H. Knapen
  • Seppo Laine
  • Gabriel M. Lubell
  • Bahram Mobasher
  • Daniel H. McIntosh
  • Klaus Meisenheimer
  • Chien Y. Peng
  • Swara Ravindranath
  • Sebastian F. Sanchez
  • Isaac Shlosman
  • Rachel S. Somerville
  • Lutz Wisotzki
  • Christian Wolf
Conference paper
Part of the Astrophysics and Space Science Library book series (ASSL, volume 319)

Abstract

Bars drive the dynamical evolution of disk galaxies by redistributing mass and angular momentum, and they are ubiquitous in present-day spirals. Early studies of the Hubble Deep Field reported a dramatic decline in the rest-frame optical bar fraction f opt to below 5% at redshifts z > 0.7, implying that disks at these epochs are fundamentally different from present-day spirals. The GEMS bar project, based on ~ 10,000 galaxies with HST-based morphologies and accurate redshifts over the range 0.2–1.3, aims at constraining the evolution and impact of bars over the last 9 Gyr. We present early results indicating that f opt remains ~ constant with a lower limit of ~ 30% over z ~ 0.2–1.3, corresponding to lookback times of ~ 2.5–9 Gyr. The bars detected at z > 0.6 are primarily strong with ellipticities of 0.4–0.8. Remarkably, both the bar fraction and range of bar sizes observed at z > 0.6, appear to be comparable to the values measured in the local Universe for bars of corresponding strengths. Implications for bar evolution models are discussed.

Keywords

Galaxy Evolution Bars Dynamics Galaxy Surveys 

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Copyright information

© Springer Science+Business Media New York 2004

Authors and Affiliations

  • Shardha Jogee
    • 1
  • Fabio D. Barazza
    • 1
  • Hans-Walter Rix
    • 2
  • James Davies
    • 1
  • Inge Heyer
    • 1
  • Marco Barden
    • 2
  • Steven V. W. Beckwith
    • 1
  • Eric F. Bell
    • 2
  • Andrea Borch
    • 2
  • John A. R. Caldwell
    • 1
  • Christopher Conselice
    • 3
  • Boris Haussler
    • 2
  • Catherine Heymans
    • 2
  • Knud Jahnke
    • 4
  • Johan H. Knapen
    • 5
  • Seppo Laine
    • 6
  • Gabriel M. Lubell
    • 7
  • Bahram Mobasher
    • 1
  • Daniel H. McIntosh
    • 8
  • Klaus Meisenheimer
    • 2
  • Chien Y. Peng
    • 9
  • Swara Ravindranath
    • 1
  • Sebastian F. Sanchez
    • 4
  • Isaac Shlosman
    • 10
  • Rachel S. Somerville
    • 1
  • Lutz Wisotzki
    • 4
  • Christian Wolf
    • 11
  1. 1.Space Telescope Science InstituteBaltimoreUSA
  2. 2.Max-Planck Institute for AstronomyHeidelbergGermany
  3. 3.Dept. of AstronomyCaltechPasadenaUSA
  4. 4.Astrophysikalisches Institut PotsdamPotsdamGermany
  5. 5.University of HertfordshireHatfield, HertsUK
  6. 6.Spitzer Science CenterCaltechPasadenaUSA
  7. 7.Dept. of Physics and AstronomyVasser CollegePoughkeepsieUSA
  8. 8.University of MassachusettsAmherstUSA
  9. 9.University of ArizonaTucsonUSA
  10. 10.University of KentuckyLexingtonUSA
  11. 11.University of Oxford AstrophysicsOxfordUK

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