所属学科： 宇宙、星系、恒星及太阳
开始日期： 2014-05-25
结束日期： 2014-05-29
所在国家： 葡萄牙
所在城市： 葡萄牙
具体地点： Lisbon, Portugal
主办单位： 国际天文学联合会
联系人： Alan Heavens
E-MAIL： a.heavens@imperial.ac.uk
会议网站： http://www.iau.org/science/events/1090/
会议背景介绍：
During the past 20 years recent years there has been a resumption of a dialogue between astronomers and statisticians, led by the Penn State conferences organized by Professors Jogesh Babu and Eric Feigelson. This dialogue has been fruitful and has been the origin of a new discipline that can be called Astrostatistics. The main tools for comparing theoretical results with observations in astronomy are statistical. However, the development of huge astronomical databases presents challenges of scale, and has initiated an active use of newly-developed statistical techniques in astronomy, notable examples being sparsity and compressed sensing. The meeting is especially timely from the point of view of cosmological surveys, where the size makes application of a fully Bayesian analysis computationally extremely demanding, especially in the realm of model selection. As examples, in the field of the microwave background, Planck's resolution leads to a dataset whose size is so large that analysis even at the two-point level is non-trivial, and at higher-order extremely challenging; Pan-STARRS1 will have a complete survey of 3pi steradians of petabyte size; the Dark Energy Survey and the VST KiDS surveys will be well underway and offering similar difficulties of analysis, and the cosmological community will be preparing for LSST and for Euclid, a survey of a large fraction of the sky at a resolution close to that of the Hubble Space Telescope. Wide-field spectroscopic cosmology surveys of will be contemplating surveys of over 10 million objects with a spectral resolution of 5000, and the SKA precursors will be grappling with data challenges which currently are unsolved. These examples also highlight the big current role and even bigger future role of archival data in astrophysics research, and the meeting offers an opportunity to show-case techniques and methodologies that will need to be used by the wider community to use these archival data. There have not yet been any IAU symposia devoted to Astrostatistics; such a symposium, with a special scientific focus on cosmological inference, is timely and of great interest.
Astrostatistics (sub)organizations within the ISI and IAU have been very active in the recent years. The International Statistical Institute, (roughly) the counterpart of the IAU, started an Astrostatistics Committee in 2009 under the leadership of statistician Joseph Hilbe. Now being reorganized as an independent International Astrostatistics Association, it has over 160 members from both the astronomical and statistical communities. They organized astrostatistics sessions at the 58th ISI Congress in August 2011 in Dublin. At the Beijing General Assembly, the IAU formed a sister organization, the Working Group in Astrostatisitcs and Astroinformatics, to reside under Commission 5 in Division B.
Each session will have at least one keynote speaker, and half of the talks will be contributed. The cross-disciplinary nature of the symposium is reflected in the inclusion of speakers from the statistics community in the suggested list.
征文范围及要求：
Topics
Cosmic microwave background
Weak lensing
Large-scale structure
High redshift supernovae
Mapping high-z 21-cm radiation
Lyman-alpha forest
Astronomical discovery from overwhelmingly large datasets
Statistical methods used in astronomical data analysis (including new developments coming from fertile cross-interactions in astrostatistics). A preliminary list of these methods is included below:
Bayesian methods, model selection
Multivariate classification,clustering
Sparsity: wavelets, compressive sampling, 2D/3D data representations
Machine learning for large multivariate datasets: Kernel regression, Support Vector Machine, neural networks, supervised learning
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