Whole Earth Telescope observations of the highest amplitude rapidly oscillating Ap star known: 3 Weeks of observations at the SAAO

我们将对一颗已知的快速振荡的化学奇特恒星进行观测，作为整个地球望远镜活动的一部分。这种类型的恒星在其大气中显示出非常异常的化学特征，这被认为是由于它们非常强的磁场而产生的。当分析这些恒星的亮度时，我们发现它们的亮度每3-21分钟变化一次。这是它们的大气脉动的结果，引起恒星温度的变化，从而产生光输出。为了详细研究这些恒星，需要持续的数据收集，这受到地球昼夜周期的限制。我们的观测将成为全球望远镜运动的一部分，世界各地的许多望远镜观测同一颗恒星，消除昼夜循环的影响。这样，我们就可以更详细地分析这颗恒星，目的是发现为什么这颗恒星会有这样的行为。在所有的roAp恒星中，我们的目标随着时间的推移显示出最剧烈的亮度变化。目前我们还不确定原因，但我们的观察将使我们能够检验许多理论。

We will conduct observations of a known rapidly oscillating chemically peculiar star as part of a whole earth telescope campaign. This type of star shows a very abnormal chemical signature in its atmosphere which is thought to arise as a result of their very strong magnetic fields. When analysing the brightness of these stars, the roAp stars, we see that they change in brightness on time scales of 3-21 minutes. This is a result of their atmospheres pulsating, causing changes in the star's temperature, and thus light output. To study these stars in detail requires continuous data collection, something that is inhibited by the day/night cycle of the Earth. Our observations will form part of a Whole Earth Telescope campaign where many telescopes around the world observe the same star, removing the effect of the day/night cycle. In doing so, we can analyse the star in much better detail with the aim of discovering why the star behaves as it does. Of all the roAp stars, our target shows the most dramatic change in its brightness over time. Currently we are unsure the reason for this, but our observations will allow us to test many theories.