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While machine learning (ML) has shown increasing effectiveness in optimizing materials properties under known physics, its application in challenging conventional wisdom and discovering new physics still remains challenging due to its…

介观与纳米尺度物理 · 物理学 2020-12-17 Prabudhya Roy Chowdhury , Xiulin Ruan

We present predicted Sunyaev-Zeldovich (SZ) properties of known X-ray clusters of galaxies for which gas temperature measurements are available. The reference sample was compiled from the BAX database for X-ray clusters. The…

宇宙学与河外天体物理 · 物理学 2015-05-14 Luis Ferramacho , Alain Blanchard

We propose a method of searching for radio sources exhibiting the Sunyaev-Zeldovich effect in the multi-frequency emission maps from the Planck mission data using a convolutional neural network. A catalog for recognizing radio sources is…

宇宙学与河外天体物理 · 物理学 2021-04-22 O. V. Verkhodanov , A. P. Topchieva , A. D. Oronovskaya , S. A. Bazrov , D. A. Shorin

We use high-resolution hydrodynamic re-simulations to investigate the properties of the thermal Sunyaev-Zel'dovich (SZ) effect from galaxy clusters. We compare results obtained using different physical models for the intracluster medium…

天体物理学 · 物理学 2009-06-23 A. Bonaldi , G. Tormen , K. Dolag , L. Moscardini

The Sunyaev-Zel'dovich (SZ) effect of galaxy clusters is characterized by three parameters: Compton parameter, electron temperature and cluster peculiar velocity. In the present study we consider the problem of extracting these parameters…

天体物理学 · 物理学 2009-11-07 Nabila Aghanim , Steen H. Hansen , Sergio Pastor , Dmitry V. Semikoz

We present a statistical strategy for the efficient determination of the cluster luminosity function from the Sunyaev-Zel'dovich (SZ) effects survey. To determine the cluster luminosity function from the noise contaminated SZ map, we first…

天体物理学 · 物理学 2009-11-07 Jounghun Lee

Thermal Sunyaev-Zel'dovich effect is one of the recent probes of cosmology and large scale structures. We update constraints on cosmological parameters from galaxy clusters observed by the Planck satellite in a first attempt to combine…

宇宙学与河外天体物理 · 物理学 2018-06-06 Laura Salvati , Marian Douspis , Nabila Aghanim

Machine learning techniques are increasingly being applied in high-energy nuclear physics data analysis thanks to their outstanding performance. One key challenge in such applications is the construction of training samples that can…

核实验 · 物理学 2025-11-14 Yan Wang , Rangrong Ma , Kaifeng Shen , Zebo Tang , Wangmei Zha

We use simulated maps to investigate the ability of high resolution, low noise surveys of the CMB to create catalogues of Clusters of galaxies by detecting the characteristic signature imprinted by the Sunyaev Zeldovich effect. We compute…

天体物理学 · 物理学 2009-08-18 Chris Vale , Martin White

The fluctuations in the Cosmic Microwave Background (CMB) intensity due to the Sunyaev-Zeldovich (SZ) effect are the sum of a thermal and a kinetic contribution. Separating the two components to measure the peculiar velocity of galaxy…

天体物理学 · 物理学 2009-11-10 A. Diaferio , S. Borgani , L. Moscardini , G. Murante , K. Dolag , V. Springel , G. Tormen , L. Tornatore , P. Tozzi

The advent of high-resolution imaging of galaxy clusters using the Sunyaev-Zel'dovich Effect (SZE) provides a unique probe of the astrophysics of the intracluster medium (ICM) out to high redshifts. To investigate the effects of cluster…

宇宙学与河外天体物理 · 物理学 2015-06-15 John J. Ruan , Thomas R. Quinn , Arif Babul

We present a parameterized model of the intra-cluster medium that is suitable for jointly analysing pointed observations of the Sunyaev-Zel'dovich (SZ) effect and X-ray emission in galaxy clusters. The model is based on assumptions of…

宇宙学与河外天体物理 · 物理学 2015-05-19 J. R. Allison , A. C. Taylor , M. E. Jones , S. Rawlings , S. T. Kay

The Sunyaev-Zel'dovich (hereafter SZ) effect is a promising tool to derive the gas temperature of galaxy clusters. The approximation of a spherically symmetric gas distribution is usually used to determine the temperature structure of…

宇宙学与河外天体物理 · 物理学 2015-05-27 D. A. Prokhorov , Y. Dubois , S. Nagataki , T. Akahori , K. Yoshikawa

We develop a model for the power spectrum of unresolved clusters of galaxies arising from the thermal Sunyaev-Zeldovich (tSZ) effect. The model is based on a'universal' gas pressure profile constrained by X-ray observations and includes a…

宇宙学与河外天体物理 · 物理学 2015-05-28 George Efstathiou , Marina Migliaccio

We propose a dedicated analysis approach for indirect Dark Matter searches with Imaging Air Cherenkov Telescopes. By using the full likelihood analysis, we take complete advantage of the distinct features expected in the gamma ray spectrum…

高能天体物理现象 · 物理学 2012-10-19 Jelena Aleksic , Javier Rico , Manel Martinez

The thermal Sunyaev-Zeldovich (SZ) effect serves as a direct potential probe of the energetic outflows from quasars that are responsible for heating the intergalactic medium. In this work, we use the GIZMO meshless finite mass hydrodynamic…

宇宙学与河外天体物理 · 物理学 2023-06-26 Avinanda Chakraborty , Suchetana Chatterjee , Mark Lacy , Soumya Roy , Samrat Roy , Rudrani Kar Chowdhury

We present the first detection of the thermal Sunyaev-Zel'dovich (tSZ) effect from a cluster of galaxies performed with a KIDs (Kinetic Inductance Detectors) based instrument. The tSZ effect is a distortion of the black body CMB (Cosmic…

The Sunyaev Zel'dovich (SZ) effect from galaxy clusters is one of the most powerful cosmological tools for investigating the large-scale Universe. The big advantage of the SZ effect is its redshift independence, which is not the case for…

宇宙学与河外天体物理 · 物理学 2015-05-20 A. Conte , M. De Petris , B. Comis , L. Lamagna , S. De Gregori

Residual foreground contamination in cosmic microwave background (CMB) maps, such as the residual contamination from thermal Sunyaev-Zeldovich (SZ) effect in the direction of galaxy clusters, can bias the cross-correlation measurements…

宇宙学与河外天体物理 · 物理学 2018-07-11 Tianyue Chen , Mathieu Remazeilles , Clive Dickinson