恒星振荡和粒化的内禀光度特性。太阳参考值和CoRoT响应函数
Intrinsic photometric characterisation of stellar oscillations and granulation. Solar reference values and CoRoT response functions
摘要：
内容：测量类太阳振荡的振幅和颗粒功率谱密度构成了两个有希望的信息来源，以提高我们的理解和描述的恒星外层对流。然而，不同的仪器，使用不同的技术和不同的带通，给出的测量结果不能直接相互比较或与理论值进行比较。目的：在这项工作中，我们定义了简单的响应函数，以根据使用特定仪器在特定恒星上获得的测光测量结果来推导出固有振荡振幅和粒化功率密度。方法：我们测试这种方法在不同的测光数据集上获得的太阳上的两个不同的仪器在三个不同的带通。结果：我们表明，结果是在良好的协议，我们建立了参考太阳的光度本征值。我们还计算了CoRoT仪器的响应函数的一系列参数代表的主要序列的类太阳能发电机与CoRoT观察。我们表明，这些响应函数可以方便地描述由简单的解析函数的目标恒星的有效温度。
英文摘要：
Context: Measuring amplitudes of solar-like oscillations and the granulation power spectral density constitute two promising sources of information to improve our understanding and description of the convection in outer layers of stars. However, different instruments, using different techniques and different bandpasses, give measurements that cannot be directly compared to each other or to theoretical values. Aims: In this work, we define simple response functions to derive intrinsic oscillation amplitudes and granulation power densities, from photometry measurements obtained with a specific instrument on a specific star. Methods: We test this method on different photometry data sets obtained on the Sun with two different instruments in three different bandpasses. Results: We show that the results are in good agreement and we establish reference intrinsic values for the Sun with photometry. We also compute the response functions of the CoRoT instrument for a range of parameters representative of the Main Sequence solar-like pulsators to be observed with CoRoT. We show that these response functions can be conveniently described by simple analytic functions of the effective temperature of the target star.
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