The Bulletin of The Korean Astronomical Society (천문학회보)

The Korean Astronomical Society (한국천문학회)
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Radiative Transfer Modeling of EC 53: An Episodically Accreting Class I Young Stellar Object

  • Baek, Giseon (School of Space Research and Institute of Natural Sciences, Kyung Hee University) ;
  • MacFarlane, Benjamin A. (Jeremiah Horrocks Institute for Mathematics, Physics and Astronomy, University of Central Lancashire) ;
  • Lee, Jeong-Eun (School of Space Research and Institute of Natural Sciences, Kyung Hee University) ;
  • Stamatellos, Dimitris (Jeremiah Horrocks Institute for Mathematics, Physics and Astronomy, University of Central Lancashire) ;
  • Herczeg, Gregory (Kavli Institute for Astronomy and Astrophysics, Peking University) ;
  • Johnstone, Doug (NRC Herzberg Astronomy and Astrophysics) ;
  • Chen, Huei-Ru Vivien (Department of Physics and Institute of Astronomy, National Tsing Hua University) ;
  • Kang, Sung-Ju (Korea Astronomy and Space Science Institute)
  • Published : 2019.04.10
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Abstract

We present 2-dimensional continuum radiative transfer modeling for EC53. EC 53 is a Class I YSO, which was brightened at $850{\mu}m$ by a factor of 1.5. This luminosity variation was revealed by the JCMT Transient Survey. The increase in brightness is likely related to the enhanced accretion. We aim to investigate how much increase of protostellar luminosity causes the observed brightness increase at $850{\mu}m$. Thus we modeled the SED of EC 53 both in the quiescence and (small scale) outburst phases, with and without the external heating from the interstellar radiation field (ISRF). We found that the internal protostellar luminosity should increase more to fit the observed flux enhancement if the ISRF is considered in the model.

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