Xu D. W.. Is There a Link Between Emission-Line Widths and X-Ray Continuum Slopes in Narrow Line Seyfert 1 Galaxies?[J]. Publications of the Yunnan Observatory, 1999, (S1): 314-317.
Citation:
Xu D. W.. Is There a Link Between Emission-Line Widths and X-Ray Continuum Slopes in Narrow Line Seyfert 1 Galaxies?[J]. Publications of the Yunnan Observatory, 1999, (S1): 314-317.
Xu D. W.. Is There a Link Between Emission-Line Widths and X-Ray Continuum Slopes in Narrow Line Seyfert 1 Galaxies?[J]. Publications of the Yunnan Observatory, 1999, (S1): 314-317.
Citation:
Xu D. W.. Is There a Link Between Emission-Line Widths and X-Ray Continuum Slopes in Narrow Line Seyfert 1 Galaxies?[J]. Publications of the Yunnan Observatory, 1999, (S1): 314-317.
Is There a Link Between Emission-Line Widths and X-Ray Continuum Slopes in Narrow Line Seyfert 1 Galaxies?
We present the discovery of 18 narrow line Seyfert 1 galaxies (NLS1).The optical spect rashow the Balmer lines only slightly broader than the forbidden lines and contain strong Fe Ⅱ emission.No particularly soft X-ray spectral slopes can be seen compared to a normal Seyfert 1 galaxies sample.
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