천문학회보 (The Bulletin of The Korean Astronomical Society)

한국천문학회 (The Korean Astronomical Society)
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Searching for LSB Dwarf Satellite Galaxies Around Nearby Galaxies in IMSNG Data

  • Lim, Gu (Center of the Exploration of the Origin of the Universe, Department of Physics & Astronomy, Seoul National University) ;
  • Im, Myungshin (Center of the Exploration of the Origin of the Universe, Department of Physics & Astronomy, Seoul National University) ;
  • Kim, Jisu (School of Space Research and Institute of Natural Sciences, Kyung Hee University) ;
  • Lee, Jeong Hwan (Astronomy Program, Department of Physics & Astronomy, Seoul National University) ;
  • Choi, Changsu (Center of the Exploration of the Origin of the Universe, Department of Physics & Astronomy, Seoul National University) ;
  • Ehgamberdiev, S. (Ulugh Beg Astronomical Institute, Uzbek Academy of Sciences) ;
  • Burkhonov, O. (Ulugh Beg Astronomical Institute, Uzbek Academy of Sciences) ;
  • Mirzaqulov, D. (Ulugh Beg Astronomical Institute, Uzbek Academy of Sciences)
  • 발행 : 2019.04.10
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초록

Low surface brightness (LSB) dwarf galaxies hold a key to resolve the small-scale problems of Lambda Cold Dark Matter (LCDM) paradigm such as missing satellites problem. Many recent studies found LSB dwarf galaxies around massive galaxies beyond Local Group up to 10Mpc. Motivated by this, we can increase the number of them by searching for LSB dwarf galaxies around galaxies up to 40Mpc. We use stacked deep (${\mu}_R{\sim}26.2mag\;arcsec^{-2}$) optical B, R-band images taken from Maidanak 1.5m telescope, one of facilities of Intensive Monitoring Survey of Nearby Galaxies (IMSNG) which monitored nearby galaxies in a day cadence from 2014 to 2016. Extended LSB sources in ambient regions of 16 nearby galaxies are selected using central surface brightness and total R magnitude criteria. After that, 24 LSB dwarf candidates are selected with visual inspection. To identify if the candidates are satellites or not, we are trying to compare the number density of LSB dwarf candidates around massive galaxies with those in Canada-France-Hawaii-Telescope Legacy Survey (CFHTLS) wide fields which have no dominant massive galaxies for control sample.

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