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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국우주과학회 Journal of Astronomy and Space Sciences Journal of Astronomy and Space Sciences 제35권 제1호
- 발행연도
- 2018.3
- 수록면
- 7 - 18 (12page)
- DOI
- https://doi.org/10.5140/JASS.2018.35.1.7
이용수
초록· 키워드
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We have investigated the intensities and full width at half maximum (FWHM) of the high dispersion spectroscopic N III emission lines of AG Peg, observed with the Hamilton Echelle Spectrograph (HES) in three different epochs at Mt. Hamilton’s Lick Observatory. The earlier theoretical Bowen line study assumed the continuum fluorescence effect, presenting a large discrepancy with the present data. Hence, we analyzed the observed N III lines assuming line fluorescence as the only suitable source: (1) The O III and N III resonance line profiles near λ 374 were decomposed, using the Gaussian function, and the contributions from various O III line components were determined. (2) Based on the theoretical resonant N III intensities, the expected N III Bowen intensities were obtained to fit the observed values. Our study shows that the incoming line photon number ratio must be considered to balance at each N III Bowen line level in the ultraviolet radiation according to the observed lines in the optical zone. We also found that the average FWHM of the N III Bowen lines was about 5 km·s-1 greater than that of the O III Bowen lines, perhaps due to the inherently different kinematic characteristics of their emission zones.
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참고문헌 (23)
참고문헌 신청
Bowen IS / 1934 / The excitation of the permitted O III nebular lines / Publ. Astron. Soc. Pac. 46:146~148
Bowen IS / 1935 / The spectrum and composition of the gaseous nebulae / Astrophys. J. 81:1~16
Eriksson M / 2005 / Bowen excitation of N III lines in symbiotic stars / Astron. Astrophys. 434:397~404
Fang X / 2011 / Very deep spectroscopy of the bright Saturn nebula NGC 7009 - I. Observations and plasma diagnostics / Mon. Not. R. Astron. Soc. 415:181~198
Feklistova T / 1997 / A new atomic line catalogue for planetary nebulae, in the International Astronomical Union book series, Vol. 180, Planetary Nebulae / Springer
Bowen IS / 1935 / The spectrum and composition of the gaseous nebulae / Astrophys. J. 81:1~16
Eriksson M / 2005 / Bowen excitation of N III lines in symbiotic stars / Astron. Astrophys. 434:397~404
Fang X / 2011 / Very deep spectroscopy of the bright Saturn nebula NGC 7009 - I. Observations and plasma diagnostics / Mon. Not. R. Astron. Soc. 415:181~198
Feklistova T / 1997 / A new atomic line catalogue for planetary nebulae, in the International Astronomical Union book series, Vol. 180, Planetary Nebulae / Springer
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