Ionized gas and radio emission in the barred Seyfert galaxy NGC 5728
Ionized gas and radio emission in the barred Seyfert galaxy NGC 5728
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塞弗特星系 NGC 5728 中的电离气体和射电发射
DOI：
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发表时间：
1988
期刊：
影响因子：
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通讯作者：
A. Turtle
中科院分区：
文献类型：
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作者：
R. Schommer;N. Caldwell;A. Wilson;J. Baldwin;M. Phillips;T. Williams;A. Turtle
本文报告了 NGC 5728 的广泛新光学和射电观测，重点关注中部地区。简要讨论了揭示微弱旋臂细节的深层照片。提供了宽带 UBV CCD 图像，用于检查组成条状和中心环的恒星群的颜色。讨论了从 H-alpha 发射线中成像光谱测量获得的速度场和发射图。描述了覆盖核区域电离气体的常规长缝光谱。提供了 NGC 5728 中心区域无线电发射的详细地图。这些综合数据为气体流入核区提供了大量证据，以响应棒的非轴对称重力势。还考虑了这种现象与 NGC 5728 的 Seyfert 性质的可能关系。 48 参考文献。
This paper reports extensive new optical and radio observations of NGC 5728, emphasizing the central regions. Deep photographs revealing detail in the faint spiral arms are briefly discussed. Broad-band UBV CCD images obtained to examine the colors of the stellar populations that comprise the bar and central ring are presented. The velocity field and emission maps obtained from imaging spectroscopic measurements in the H-alpha emission line are discussed. Conventional long-slit spectra covering the ionized gas in the nuclear region are described. Detailed maps of the radio emission in the central regions of NGC 5728 are presented. These combined data provide considerable evidence for the inflow of gas into the nuclear region, in response to the nonaxisymmetric gravitational potential of the bar. The possible relation of this phenomenon to the Seyfert nature of NGC 5728 is also considered. 48 references.