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系外行星与宿主恒星的光强对比度相差悬殊,通常在10-6~10-10量级,且两者角距离多在一个角秒以内,对应仪器几个衍射限(λ/D),这需要星冕仪充分发挥作用才能够直接获取系外行星的图像,进而打开行星大气光谱的研究窗口。在地基天文观测中,超级自适应光学系统(简称ExAO)能够将波像差校正到极限,从而保证星冕仪对恒星光抑制作用发挥到极致,包括对大气扰动引入的动态波像差的实时校正(频率高达上千赫兹)和系...
We measured the clustering of galaxies around damped absorbers, all at a redshift of approximately three. For this purpose, we used wide-field images that covered a total area of one square degree. We...
In this thesis I develop Bayesian approach to model galaxy surface brightness and apply it to a bulge-disc decomposition analysis of galaxies in near-infrared band, from Two Micron All Sky Survey (2MA...
Data gaps are ubiquitous in spectral irradiance data, and yet, little effort has been put into finding robust methods for filling them. We introduce a data-adaptive and nonparametric method that allow...
Known bright S stars, recognized as such by their enhanced s-process abundances and C/O ratio, are typically members of the asymptotic giant branch (AGB) or the red giant branch (RGB). Few modern digi...
We present results of deep integral field spectroscopy observations using high resolution optical (4150-7200 A) VIMOS VLT spectra, of NGC 4696, the dominant galaxy in the Centaurus cluster (Abell 3526...
OSIRIS (Optical System for Imaging and low Resolution Integrated Spectroscopy) is the first light instrument of the Gran Telescopio Canarias (GTC). It provides a flexible and competitive tunable filte...
In this study, we present photometric and spectroscopic variations of the extremely small mass ratio ($q\simeq 0.1$) late-type contact binary system \astrobj{V1191 Cyg}. The parameters for the hot and...
压缩成像是压缩传感理论的一个重要应用领域.本文将确定性测量引入压缩成像,提出一种确定性相位掩膜可压缩双透镜成像方法.模拟实验结果表明,新的成像方法可以在显著地降低物理实现成本的同时,有效地捕获图像信息来重建原始图像.此方法改变了经典的模拟-数字转换的光学成像思路,减少模数转换开销,并有利于图像的传输和存储,可以为照相机的设计提供若干理论、计算和技术支撑.
uvby β Photoelectric Photometry of NGC 7063。
Elmer imaging:characterization and perfomance results from the pre-shipping acceptance tests。
Status of the Canarias infrared camera experiment (CIRCE) 。
Measurement of Double Stars with a CCD Camera:Two Methods。
Frida:diffraction limited imaging and integral field spectroscopy with gtc。
CCD-Based Astrometric Measurement of Photographic Plates。

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