A very bright water vapour maser source in the galaxy NGC3079
A very bright water vapour maser source in the galaxy NGC3079
复制标题
NGC3079星系中非常明亮的水蒸气脉泽源
作者：
A. Haschick;W. Baan
在我们的银河系中，发现22.235080 GHz处的水蒸气的616 - 523跃迁与年轻星星形成区有关1，2。H2O脉泽发射最初是由Churchwellet al.3在外部星系中探测到的。为了扩大范围的检测性能的"星星爆发"星系（星系表现出增强的星星形成从他们的光谱），我们进行了初步调查，在这种类型的星系的H2O脉泽发射，但与负面的结果。在这里，我们报告随后的扩展，这一调查显示连续射电辐射的螺旋星系，这也是一个迹象，星星形成活动。我们在星系NGC3079中探测到迄今为止报道的最明亮的H2O脉泽源，10500L0。OH吸收也在这个星系中检测到，我们认为，微波激射放大的核射电源的可观察到的H2O排放的原因。
The 616–523transition of water vapour at 22.235080 GHz has been found in our Galaxy to be associated with regions of young star formation1,2. H2O maser emission was detected initially in an external galaxy by Churchwellet al.3. To extend the range of detected properties of ‘star burst’ galaxies (galaxies showing an enhanced star formation from their optical spectra) we undertook an initial survey for H2O maser emission in this type of galaxy, but with negative results. Here we report on the subsequent extension of this survey to spiral galaxies displaying continuum radio emission, which is also an indication of star formation activity. We have detected the most luminous H2O maser source yet reported, ∼500L0, in the galaxy NGC3079. OH absorption was also detected in this galaxy and we suggest that maser amplification of the nuclear radio source causes the observable H2O emission.