Astrophysical Studies of Gravitational Lenses, Faint Galaxies, Quasars and Cosmical Magnetic Fields

天体物理学对引力透镜、暗星系、类星体和宇宙磁场的研究。布兰福德正在进行四个相关项目：1。他正在对引力透镜的个别情况进行建模。现在有超过30个强引力透镜的例子，其中背景源的多个透镜主要是由一个介入星系的透镜效应形成的。他正在验证这样一个假设，即当椭圆星系位于一个小星系群中时，观测到的透镜效应发生率最高。他正在分析高度完备的铅笔束巡天，以确定观察到的星系的性质与它们的环境之间的关系。3. 他正在开发一种解释宽吸收线类星体的新模型，该模型将这些天体，以及延伸开来，将很大一部分正常的、无无线电的类星体与以超临界速率提供气体的黑洞联系起来。他正在研究一种可能性，即与重联点相关的慢速和快速磁流体动力学冲击波在诸如射电喷流、日冕和吸积盘等各种环境中的相对论性粒子加速中都起着重要作用。

Astrophysical studies of gravitational lenses, faint galaxies, quasars and cosmical magnetic fieldsRoger BlandfordDr. Blandford is conducting four related projects: 1. He is modeling individual cases of gravitational lenses. There are now over thirty examples of strong gravitational lenses in which multiple lenses of a background source are formed primarily by the lensing effect of an intervening galaxy. He is testing the hypothesis that the highest incidence of observed lensing arises when an elliptical galaxy resides in a small group.2. He is analyzing pencil beam surveys of high completeness to determine how the properties of observed galaxies are related to their environments. 3. He is developing a new model for the interpretation of broad absorption line quasars that associates these objects and, by extension, a large fraction of normal, radio-quiet quasars with black holes that are being supplied with gas at a super-critical rate.4. He is examining the possibility that both the slow and the fast magnetohydrodynamic shock waves associated with reconnection sites have an important role in relativistic particle acceleration in environments as diverse as radio jets, the solar corona and accretion disks.