The Bulletin of The Korean Astronomical Society (천문학회보)

The Korean Astronomical Society (한국천문학회)
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Near-infrared Spectroscopy of Young Stellar Objects around the Supernova Remnant G54.1+0.3

  • Kim, Hyun-Jeong (Department of Physics and Astronomy, Seoul National University) ;
  • Koo, Bon-Chul (Department of Physics and Astronomy, Seoul National University) ;
  • Moon, Dae-Sik (Department of Astronomy and Astrophysics, University of Toronto) ;
  • Lee, Sang-Gak (Department of Physics and Astronomy, Seoul National University)
  • Published : 2010.04.06
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Abstract

We present near-infrared (NIR) spectra of 6 young stellar objects (YSOs) around the supernova remnant G54.1+0.3 obtained with TripleSpec, a slit-based NIR cross-dispersion echelle spectrograph on th 5-m Palomar Hale telescope covering the entire NIR atmospheric window of 1-2.4 micron. These YSOs, whose formation was possibly triggered by the progenitor of G54.1+0.3, show significant mid-infrared (MIR) excess and have been proposed to be late O- and early B-type YSOs based on their spectral energy distribution. Our TripleSpec observations reveal the existence of strong H and He I lines, consistent with the previous interpretation of their spectral types, while the absence of Br-gamma emission line indicates that the YSOs do not have a nearby circumstellar disk. We discuss the relation between these YSOs and G54.1+0.3 based on the TripleSpec data and previous photometric data as well.

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