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Future Extremely Large Telescopes will adopt segmented primary mirrors with several hundreds of segments. Cophasing of the segments together is essential to reach high wavefront quality. The phasing sensor must be able to maintain very high…

天体物理仪器与方法 · 物理学 2015-05-27 Arthur Vigan , Kjetil Dohlen , Silvio Mazzanti

Abridged: The golden age of astrophysics is upon us with both grand discoveries (extra-solar planets, dark matter, dark energy) and precision cosmology. Fundamental understanding of the working of stars and galaxies is within reach, thanks…

An array of large observational programs using ground-based and space-borne telescopes is planned in the next decade. The forthcoming wide-field sky surveys are expected to deliver a sheer volume of data exceeding an exabyte. Processing the…

天体物理仪器与方法 · 物理学 2023-05-26 Kana Moriwaki , Takahiro Nishimichi , Naoki Yoshida

Observational cosmology provides us with a large number of high precision data which are used to derive models trying to reproduce ``on the mean'' our observable patch of the Universe. Most of these attempts are achieved in the framework of…

天体物理学 · 物理学 2011-11-10 Marie-Noëlle Célérier

The frequency of giant arcs - highly distorted and strongly gravitationally lensed background galaxies - is a powerful test for cosmological models. Previous comparisons of arc statistics for the currently favored concordance cosmological…

天体物理学 · 物理学 2009-11-07 Joachim Wambsganss , Paul Bode , Jeremiah P. Ostriker

Assuming that the cosmological principle holds, Maartens, Ellis and Stoeger (MES) recently constructed a detailed scheme linking anisotropies in the cosmic background radiation (CMB) with anisotropies and inhomogeneities in the large scale…

天体物理学 · 物理学 2008-12-01 William Stoeger , Marcelo Araujo , Tim Gebbie

Modern Multimessenger Astronomy is a powerful instrument for performing cosmological crucial tests of the Standard Cosmological Model in the wide redshift interval up to $z \sim 10$. This is principally important for discussion related to…

宇宙学与河外天体物理 · 物理学 2020-09-25 S. I. Shirokov , I. V. Sokolov , V. V. Vlasyuk , L. Amati , V. V. Sokolov , Yu. V. Baryshev

This paper presents a joint blinding and deblinding strategy for inference of physical laws from astronomical data. The strategy allows for up to three blinding stages, where the data may be blinded, the computations of theoretical physics…

宇宙学与河外天体物理 · 物理学 2020-01-15 Elena Sellentin

Astronomical images provide information about the great variety of cosmic objects in the Universe. Due to the large volumes of data, the presence of innumerable bright point sources as well as noise within the frame and the spatial gap…

计算机视觉与模式识别 · 计算机科学 2023-08-03 Samia Sultana , Shyla Afroge

It is generally accepted that certain astronomical and cosmological observations can be explained by invoking the concepts of Dark Matter and Dark Energy (DM/DE). Applying straightforward extensions of the Standard Model to DM/DE, results…

仪器与探测器 · 物理学 2016-10-05 James R. Boyce , Andrei Afanasev , Oliver Keith Baker , Michelle Shinn

Using the 2MASS Photometric Redshift catalogue we perform a number of statistical tests aimed at detecting possible departures from statistical homogeneity and isotropy in the large-scale structure of the Universe. Making use of the angular…

宇宙学与河外天体物理 · 物理学 2015-06-23 David Alonso , Ana Isabel Salvador , Francisco Javier Sánchez , Maciej Bilicki , Juan García-Bellido , Eusebio Sánchez

In this paper, we explore how the forthcoming generation of large-scale radio continuum surveys, with the inclusion of some degree of redshift information, can constrain cosmological parameters. By cross-matching these radio surveys with…

宇宙学与河外天体物理 · 物理学 2015-03-20 Stefano Camera , Mário G. Santos , David J. Bacon , Matt J. Jarvis , Kim McAlpine , Ray P. Norris , Alvise Raccanelli , Huub Röttgering

Photometric redshift estimation is an indispensable tool of precision cosmology. One problem that plagues the use of this tool in the era of large-scale sky surveys is that the bright galaxies that are selected for spectroscopic observation…

天体物理仪器与方法 · 物理学 2017-07-18 Peter E. Freeman , Rafael Izbicki , Ann B. Lee

The cosmological principle is fundamental to the standard cosmological model. It assumes that the Universe is homogeneous and isotropic on very large scales. As the basic assumption, it must stand the test of various observations. In this…

宇宙学与河外天体物理 · 物理学 2023-11-13 J. P. Hu , Y. Y. Wang , J. Hu , F. Y. Wang

The cosmological peculiar velocity field (deviations from the pure Hubble flow) of matter carries significant information on dark energy, dark matter and the underlying theory of gravity on large scales. Peculiar motions of galaxies…

宇宙学与河外天体物理 · 物理学 2013-01-17 Adi Nusser , Enzo Branchini , Martin Feix

The sky-averaged Compton-$y$ distortion in the cosmic microwave background (CMB) energy spectrum, $\langle y \rangle$, provides information about energy injection in the Universe occurring at $z \lesssim 5\times10^{4}$. It is primarily…

宇宙学与河外天体物理 · 物理学 2025-08-07 Alina Sabyr , Giulio Fabbian , J. Colin Hill , Federico Bianchini

For more that seventy years, the measurements of fluxes of galaxies at different wavelengths and derived colours have been used to estimate their corresponding cosmological distances. From the fields of galaxy and AGN evolution to precision…

星系天体物理 · 物理学 2018-06-06 Mara Salvato , Olivier Ilbert , Ben Hoyle

The imaging and spectroscopy of habitable worlds will require large-aperture space-based telescopes, to increase the collecting area and the angular resolution. These large telescopes will necessarily use segmented primaries to fit in a…

The characterization of the optical properties of the atmosphere in the near UV, in particular the tropospheric aerosol stratification, clouds optical depth and spatial distribution are common in the field of atmospheric physics, due to…

天体物理仪器与方法 · 物理学 2014-03-25 M. Buscemi , C. Cassardo , M. Cilmo , M. Coco , S. Ferrarese , F. Guarino , A. S. Tonachini , L. Valore , L. Wiencke

New observations of high-redshift objects are crucial for the improvement of the standard $\Lambda$CDM cosmological model and our understanding of the Universe. One of the main directions of modern observational cosmology is the analysis of…

宇宙学与河外天体物理 · 物理学 2020-11-24 Maxim Nikonov , Mikhail Chekal , Stanislav Shirokov , Andrey Baryshev , Vladimir Gorokhov