论文标题
微透明朝向麦哲伦云的视差：对检测效率和可检测性的影响
Parallax in microlensing toward the Magellanic Clouds: effect on detection efficiency and detectability
论文作者
论文摘要
目标。我们研究了视差对寻找很长的时间尺度微透镜事件对麦芽岩云的影响，这是由于过去的男子气概内和Eros中的深度巨大紧凑物体，正在进行的MOA和OGLE以及未来的LSST调查。我们量化了忽略这种影响对经典事件选择过程的影响，并在没有后续观察结果的帮助下量化视差可检测性。我们定义了受视差影响的真实事件与没有视差的最接近事件之间的距离。此距离用于估计由于视差而缺少事件预选的可能性，因为任何以其时间采样和光度表现为特征的调查。我们还定义了另一个距离来量化视差效应的可检测性，以触发互补观测。我们发现，如果标准相当紧张，那么多年时间尺度事件的预选会受到所有调查的视差影响。我们还表明，在LSST调查发现的大多数事件中，应检测到视差，而无需进行后续观察。
Aims. We study the impact of the parallax on the search for very long timescale microlensing events towards the Magellanic Clouds due to dark massive compact objects within the past MACHO and EROS, the ongoing MOA and OGLE, and the future LSST surveys. We quantify the impact of neglecting this effect on the classical event selection process and also quantify the parallax detectability without the help of follow-up observations.Methods. We define a distance between true events affected by parallax and the closest events without parallax. This distance is used to estimate the probability of missing the preselection of events because of parallax, for any survey characterised by its time sampling and photometric performance. We also define another distance to quantify the detectability of the parallax effect, in order to trigger complementary observations.Results. We find that the preselection of years long time scale events is marginally affected by parallax for all surveys, provided the criteria are reasonably tight. We also show that the parallax should be detectable in the majority of the events found by the LSST survey without follow-up observations.
