Journal of The Korean Astronomical Society (천문학회지)

The Korean Astronomical Society (한국천문학회)
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CO J=2-1 LINE OBSERVATIONS TOWARD THE SUPERNOVA REMNANT G54.1+0.3

  • Lee, Jung-Won (Korea Astronomy and Space Science Institute) ;
  • Koo, Bon-Chul (Department of Physics and Astronomy, Seoul National University) ;
  • Lee, Jeong-Eun (Department of Astronomy and Space Science, Kyung Hee University)
  • Received : 2012.08.03
  • Accepted : 2012.09.08
  • Published : 2012.10.31
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Abstract

We present $^{12}CO$ J = 2-1 line observations of G54.1+0.3, a composite supernova remnant with a mid-infrared (MIR) loop surrounding the central pulsar wind nebula (PWN). We map an area of $12^{\prime}{\times}9^{\prime}$ around the PWN and its associated MIR loop. We confirm two velocity components that have been proposed to be possibly interacting with the PWN/MIR-loop; the +53 km $s^{-1}$ cloud, which appears in contact with the eastern boundary of the PWN and the +23 km $s^{-1}$ cloud, which has CO emission coincident with the MIR loop. However, we have not found a direct evidence for the interaction in either of these clouds. Instead, we detected an 5'-long arc-like cloud at +15-+23 km $s^{-1}$ with a systematic velocity gradient of ~3 km $s^{-1}$ $arcmin^{-1}$ and broad-line emitting CO gas with widths (FWHM) of ${\leq}7km\;s^{-1}$ in the western interior of the supernova remnant. We discuss their association with the supernova remnant.

Keywords

Acknowledgement

Supported by : National Research Foundation of Korea (NRF)

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