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The Korean Astronomical Society (한국천문학회)
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A STUDY OF A TIDALLY INTERACTING BCD PAIR: ESO 435-IG20 AND ESO435-IG16

  • KIM, JINHYUB (Department of Astronomy and Yonsei University Observatory, Yonsei University) ;
  • SUNG, EON-CHANG (Korea Astronomy and Space Science Institute) ;
  • CHUNG, AEREE (Department of Astronomy and Yonsei University Observatory, Yonsei University) ;
  • STAVELEY-SMITH, LISTER (International Centre for Radio Astronomy Research, M468, University of Western Australia)
  • Received : 2014.11.30
  • Accepted : 2015.06.30
  • Published : 2015.09.30
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Abstract

We investigate $H\small{I}$ data for a pair of blue compact dwarf galaxies (BCDs), ESO 435-IG20 and ESO 435-IG16, obtained with the Australia Telescope Compact Array. The outer $H\small{I}$ disk is highly disturbed and asymmetric in both galaxies showing a gas tail and/or a broad/extended gas disk on only one side. Based on their low-density surroundings and small projected distance (<80 kpc) at a similar redshift, we conclude that tidal interaction between these two BCDs is responsible for the morphological and kinematical peculiarities in $H\small{I}$. We also investigate their star formation rates using $H{\alpha}$ and UV imaging data to probe their interaction history.

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References

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