Galaxy zoo: stronger bars facilitate quenching in star-forming galaxies

  title={Galaxy zoo: stronger bars facilitate quenching in star-forming galaxies},
  author={Tobias G{\'e}ron and Rebecca J Smethurst and Chris J. Lintott and Sandor J. Kruk and Karen L. Masters and Brooke D. Simmons and David V. Stark},
  journal={Monthly Notices of the Royal Astronomical Society},
We have used Galaxy Zoo DECaLS (GZD) to study strong and weak bars in disc galaxies. Out of the 314 000 galaxies in GZD, we created a volume-limited sample (0.01 < z < 0.05, Mr < − 18.96) which contains 1867 galaxies with reliable volunteer bar classifications in the ALFALFA footprint. In keeping with previous Galaxy Zoo surveys (such as GZ2), the morphological classifications from GZD agree well with previous morphological surveys. GZD considers galaxies to either have a strong bar (15.5 per… 
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