Galaxy Zoo: the dependence of the star formation-stellar mass relation on spiral disk morphology

Kyle W. Willett, Kevin Schawinski, Brooke D. Simmons, Karen L. Masters, Ramin A. Skibba, Sugata Kaviraj, Thomas Melvin, O. Ivy Wong, Robert C. Nichol, Edmond Cheung, Chris J. Lintott, Lucy Fortson

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Abstract

We measure the stellar mass-star formation rate relation in star-forming disk galaxies at z 1. Of the galaxies lying significantly above the M-SFR relation in the local Universe, more than 50% are mergers. We interpret this as evidence that the spiral arms, which are imperfect reflections of the galaxy's current gravitational potential, are either fully independent of the various quenching mechanisms or are completely overwhelmed by the combination of outflows and feedback. The arrangement of the star formation can be changed, but the system as a whole regulates itself even in the presence of strong dynamical forcing.
Original languageEnglish
Pages (from-to)820-827
JournalMonthly Notices of the Royal Astronomical Society
Volume449
Issue number1
Early online date19 Mar 2015
DOIs
Publication statusPublished - 1 May 2015

Keywords

  • astro-ph.GA
  • RCUK
  • STFC
  • ST/M001156/1

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