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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...
The clustering of galaxies around damped absorbers
Clustering damping Galaxy Wide-angle image The redshift slices. Bayesian metering redshift technology
2014/12/9
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...
Bayesian Anatomy of Galaxy Structure
Bayesian Statistics Galaxy Markov chain Monte Carlo Morphology
2014/12/9
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...
A method for filling gaps in solar irradiance and in solar proxy data
method filling gaps solar irradiance solar proxy
2011/10/13
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...
Galactic S Stars: Investigations of Color, Motion, and Spectral Features
Galactic S Stars: Investigations Motion Spectral Features
2011/10/12
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...
A deep spectroscopic study of the filamentary nebulosity in NGC4696, the brightest cluster galaxy in the Centaurus cluster
galaxies: clusters: individual: Centaurus - galaxies: cooling fl ows - galaxies:individual: NGC 4696
2011/10/12
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...
Wavelength calibration for OSIRIS/GTC* tunable filters
Wavelength calibration OSIRIS/GTC* tunable filters
2011/10/12
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...
Marginally low mass ratio close binary system V1191 Cyg
Marginally ratio close binary V1191 Cyg
2011/9/27
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
Elmer imaging pre-shipping acceptance tests characterization
2009/7/1
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
diffraction limited gtc field spectroscopy
2009/6/25
Frida：diffraction limited imaging and integral field spectroscopy with gtc。
CCD-Based Astrometric Measurement of Photographic Plates
Photographic Plates Astrometric Measurement
2009/6/16
CCD-Based Astrometric Measurement of Photographic Plates。