Journal of Astronomy and Space Sciences

  • 제15권1호
  • /
  • Pages.27-38
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  • 1998
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  • 2093-5587(pISSN)
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  • 2093-1409(eISSN)
한국우주과학회 (The Korean Space Science Society)
권호 표지

ON THE EXTRACTION OF OPTICAL ROTATION CURVES FOR SPIRAL GALAXIES

  • 발행 : 1998.06.01
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⟨ 이전 논문 다음 논문 ⟩

초록

We discussed four different methods - the single, double and triple Gaussian fits, and the intensity weighted centroid fit - which extract rotation curves from several emis-sion lines(i.e. [OII], $H{\beta}$, [OIII], and $H{\alpha}$) of spiral galaxies. Spatial extents and the shapes of rotation curves derived through various methods applying to each emission lines of a sample galaxy UGC 11635 are all in a good agreement with one another. Linewidths of $H{\beta}$ and $H{\alpha}$ measure from rotation profiles are in a good agreement with $H{\alpha}$ linewidth of Courteau (1992). however, linewidths of [OII] seems to be much broader than $H{\alpha}$, and the profile of [OIII] does not follow the profile of $H{\alpha}$.

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참고문헌

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