CCD Photometry of the M87 Jet
CCD Photometry of the M87 Jet
复制标题
M87 Jet 的 CCD 光度测量
DOI：
10.1086/185181
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
P. Biermann
中科院分区：
文献类型：
--
作者：
I. Pérez;J. Gonzalez;L. Colina;P. Biermann
本文给出了用Tuan-Gunn r滤光片和g滤光片对M87喷流进行的CCD测光。从简化和校准的框架中减去了下面恒星发射的准确椭圆模型。残差图像显示了一些以前没有清楚看到的形态特征，如喷流末端的微弱延伸和北侧平行于喷流的微弱红色漫反射发射。R带和g带之间的结的光谱比射电中的更陡峭，一般来说，随着距离原子核的距离变得更陡峭。简要讨论了这一新结果对喷流中粒子加速机制的影响。没有探测到强度比喷流弱300倍的反喷流，这对M87的相对论束流模型构成了更强的约束。参考文献30篇。
CCD photometry of the M87 jet in the Thuan-Gunn r and g filters is presented. Accurate elliptical models of the underlying stellar emission were subtracted from the reduced and calibrated frames. The residual images show a number of morphological features not clearly seen before such as the faint extension at the end of the jet and faint red diffuse emission parallel to the jet on its northern side. The optical spectrum of the knots between the r and g bands is steeper than in the radio and, in general, becomes steeper with distance from the nucleus. The implications of this new result for particle acceleration mechanisms in jets are briefly discussed. The nondetection of a counterjet at an intensity level 300 times fainter than the jet places stronger constraints to relativistic beaming models of M87. 30 references.