星周包层微透镜的偏振和SED
Polarization and SEDs from Microlensing of Circumstellar Envelopes
摘要：
微透镜巡天已被证明是非常富有成效的，为天体物理学的许多领域提供了有价值的数据产品，从亚恒星候选者的日食光变曲线到恒星大气的临边变暗。我们报告了一个程序的建模观测量从微透镜的拱星信封，特别是那些红巨星是最有可能表现出有限的源效应。我们将总结如何偏振光变曲线可以用来推断包络特性的工作，并将描述最近建模的时间依赖的光谱能量分布（SED）的尘埃风微透镜。最令人兴奋的发展之一是使用拉帕尔马的RINGO偏振计在合适的光源中测量微透镜的可变偏振的可能性。同样令人感兴趣的是，如果斯皮策有一个“温暖”的循环，使用IRAC数据探测沙尘风的可能性是合适的来源。
英文摘要：
Microlensing surveys have proven to be tremendously fruitful in providing valuable data products for many fields of astrophysics, from eclipse lightcurves for substellar candidates to limb darkening in stellar atmospheres. We report on a program of modeling observables from microlensing of circumstellar envelopes, particularly those of red giant stars that are the most likely to show finite source effects. We will summarize work for how polarization light curves can be used to infer envelope properties and will describe recent modeling of the time dependent spectral energy distributions (SEDs) for microlensing of dusty winds. One of the most exciting developments is the possibility of measuring variable polarization from microlensing in a suitable source using the RINGO polarimeter at La Palma. Also quite interesting is the possibility of probing a dusty wind using IRAC data for a suitable source in the event that Spitzer has a ``warm'' cycle.
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